Re: [Emc-users] BLDC Hal component
On 02/01/2015 08:36 AM, andy pugh wrote: > On 1 February 2015 at 16:25, Kirk Wallace wrote: >> However, they are >> inflexible in their application, and must be specifically "tuned" to >> meet the drive system requirements > > I wonder what that means, and if it is even true? > I know very little about resolvers, but I think it means that resolvers are analog so one needs to determine what the 100% and 0% signal values are, and values in between (to deal with linearity) to convert to data. Encoder signals are ether on or off and directly usable for data. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BLDC Hal component
... snip >>> I think that the servos + resolvers will work a fair bit better than >>> steppers. I was rather upset when I found that my ebay bargain servos >>> had resolvers, but now I am something of a fan of the devices. >> I have to agree, if they are used correctly with good electronics to >> drive them, they are very good and they last. ... snip For most cases, my vote is with encoders, but if the resolvers are installed and working that's a plus for resolvers. I didn't have an option at the time I converted my lathe: http://www.wallacecompany.com/cnc_lathe/HNC/6-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/ http://www.heidenhain.us/enews/stories_0411/AUmain.php -- "SUMMARY Resolvers provide absolute position information and are capable of operating in relatively high temperature and shock environments because they are similar in construction to the motor itself. However, they are inflexible in their application, and must be specifically "tuned" to meet the drive system requirements. Encoders on the other hand, can be absolute or incremental, simplify the design task, are more accurate, allow for a wider dynamic range and are more flexible should changes be necessary in the future." -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Fourth Axis
I'm trying to get up to speed on what a mill fourth axis presentation should be in the LinuxCNC backplot (Gremlin). Currently, any rotation of the A axis either rotates the tool centered on the control point, or rotates the tool around the control point and then around the machine X origin. I have some notes here: http://www.wallacecompany.com/machine_shop/LinuxCNC/fourth_axis/ I would like to get links showing other systems that may be doing this properly or better. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hardinge CHNC
On 01/26/2015 08:23 AM, Kirk Wallace wrote: > On 01/22/2015 01:56 PM, Kirk Wallace wrote: >> In case someone on the East coast (USA) might be interested: >> http://www.ebay.com/itm/121549533052 >> > > It didn't sell. > > Shoot, It's worth that much to me just for the A2-5 headstock. > Here is another: http://www.ebay.com/itm/151567143433 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hardinge CHNC
On 01/22/2015 01:56 PM, Kirk Wallace wrote: > In case someone on the East coast (USA) might be interested: > http://www.ebay.com/itm/121549533052 > It didn't sell. Shoot, It's worth that much to me just for the A2-5 headstock. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hardinge CHNC
On 01/24/2015 11:08 AM, r...@superiorroll.com wrote: > How much were they asking for it? Where is it at, and what control does it > currently have on it? > > Rick http://www.ebay.com/itm/121549533052 $1.5k at present, with 1.5 days left. Avon, Massachusetts, United States General Numeric: http://i.ebayimg.com/00/s/MTYwMFgxMjAw/z/IYoAAOSwnDZUCH9o/$_57.JPG My HNC was moved a half a block on a medium sized fork lift, so I'd guess it's maybe 2,500 to 3,500 lbs. http://www.wallacecompany.com/cnc_lathe/HNC/3-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] DC Supply
Thinking aloud... I have been playing with an MA860H stepper drive which seems to work well enough for my mill. http://wallacecompany.com/ma860h/ http://www.wallacecompany.com/machine_shop/Shizuoka/ I have an Antek toroidal transformer that is feeding 75 VAC to the drive. The drive has an input limit of 80 VAC or 110 VDC. Although, to feed three drives, I'll need a bigger transformer to supply 15 Amps or more. I can use a 60Hz big iron transformer, but these are big, heavy and expensive to purchase and ship. I could use multiple toroids, but these are expensive. Then I got to thinking. What about a buck converter to convert mains (120 or 240 VAC) to mains DC to high Hz AC to let's say 90 VDC? Or more simply, pump the useful part of the mains AC into a large capacitor in a way that maintains the DC voltage I need? This sounds a little like an SCR circuit, such as a light dimmer, universal motor speed controller, or SCR DC welder. This might be a way to leverage a cheap second hand commodity device to a specialty purpose. (But keeping in mind that common converters don't like their outputs switched.) So, what are some ways of feeding roughly 90 VDC or 70 VAC at 15 Amps to motor drives from 240 VAC mains? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linux Program for Wiring Diagrams
On 01/23/2015 09:40 PM, Evan Foss wrote: > I use geda. > > http://www.geda-project.org/ > I use gEDA too. I tried Eagle, but the making of devices is just _too_ difficult compared to gEDA. Too bad Eagle has become the standard, much like Windows. I also use Inkscape for documenting system layouts. Making and labeling blocks is easy, but the connection routing at my skill level is just running lines, so there is no intelligence behind the connections. There is also a LinuxCNC extension to Inkscape for generating g-code: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?InkscapeHowto http://www.cnc-club.ru/forum/viewtopic.php?f=33&t=35&start=420 gEDA has an extension for HAL: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?HalSchematicsUsingGschem -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Hardinge CHNC
In case someone on the East coast (USA) might be interested: http://www.ebay.com/itm/121549533052 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Fwd: Re: MA860H Stepper Driver
Original Message Subject: Re: [Emc-users] MA860H Stepper Driver Date: Mon, 19 Jan 2015 10:20:54 -0800 From: Kirk Wallace To: emc-users@lists.sourceforge.net In case anyone might be interested, I have pictures of the driver board here: http://wallacecompany.com/ma860h/ On 01/15/2015 06:40 PM, Kirk Wallace wrote: > I just received one of these (2.5 weeks from China) as a possible > replacement for my unipolar driver that keeps blowing out transistors: > http://www.ebay.com/itm/331393094727 > > The original drivers run at 45V and 8 amps, with NEMA42 motors with 2.5 > Ohms per coil. The new driver can run at somewhere around 100V and 7.2 > amps and the motor is wired for 5 Ohms bipolar. I did a brief test at > 50V and a setting of 5 amps (1/4 stepping), with the sample stepper > config, and so far so good. The original drivers make the motors sing, > but this one is silent (except for the steps). There are no specs on the > signal timing, so I'll need to play with this, as well as try the > maximum amp setting at 7.2, and upping the voltage to 100V. I may need > to get more to do Y and Z. > > If anyone has used these drivers with NEMA42 motors and has any addition > information or advise, please let me know. > > One thing that comes to mind. I looks like there is no overload > protection, such as a power input fuse or breaker. It would seem prudent > to add a fuse. > -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Manual Mill Setup Question
On 01/17/2015 04:11 PM, Chris Radek wrote: > On Sat, Jan 17, 2015 at 11:06:20PM +, Andy Pugh wrote: >> >> In that case you would also need a mux2 controlled by the same >> signal to switch the feedback between encoder position and >> commanded position for each axis. Though that would lose the DRO >> so perhaps it would be better to change the F-error limits. > > I think you guys are thinking of this exactly backwards. If I > understand right, you want to move the table manually while the > spindle is running. You've gone down the path of wanting to trick > linuxcnc into being in "machine on" mode even though the amps are > disabled, so you can tell it to turn on the spindle. > > But the better solution is to leave linuxcnc in "machine off" mode, > which disables the amps and gives you a working DRO, and more > importantly, the position tracks so when you go back to "machine on" > you don't get a nasty position jump or any other weirdness. > > So the problem remaining is that linuxcnc won't turn on the spindle > in this mode. Right, so poke the button on the VFD that makes it > come on, or install a (real actual) switch. > > Chris Am I missing something? Whats wrong with a stand alone DRO/VFD gladeVCP app that does nothing but display the position and interface to the VFD? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Manual Mill Setup Question
On 01/17/2015 12:52 PM, Andy Pugh wrote: > > > >> On 17 Jan 2015, at 17:34, Mark Johnsen wrote: >> >> What I think I want in axis is a button to manually enable or disable the >> servos when in 'machine enable' mode. Is there such a button, or do I need >> to add via a python widget? > > How about disabling the servos with the "mist coolant" output? > You would need to invest it in Hal then and2 it with amp-enable. ... snip I think you will get a following error when an axis is moved. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Manual Mill Setup Question
On 01/17/2015 09:42 AM, Pete Matos wrote: > Mark, There is a servo enable button but it basically enables the > whole system. Not sure why anyone would want to have manual control > when a CNC mill is pretty much like a manual mill with accurate DRO's > and power feeds on all axes when in operation. ... snip I think mark may have cranks on his mill that he wants to use in manual mode. A setup that just reads the axis encoders and controls the VFD might be the goal. This may be close: http://www.wallacecompany.com/machine_shop/EMC2/dro_vfd/ (older) http://www.wallacecompany.com/machine_shop/LinuxCNC/gvcpDRO/ (newer but w/o VFD) I'm with Pete on using the e-stop only for e-stop features. Taking AXIS out of e-stop should allow you to turn the machine on and allow enabling enabling hardware. I haven't played with this, but on my mill the PC is powered separately so I can turn it on any time. The e-stop turns the mains relay which turns on and enables the rest of the machine. I think this is blowing out my old stepper drivers because as they are powering up they are also enabling causing an unstable state. It may be better to have the e-stop button enable the power button (which AXIS does already), the power button should power up the machine, then allow enabling or invoke an enable sequence. A post-gui hal file may be needed for this. http://linuxcnc.org/docs/html/config/ini_config.html#_hal_section_a_id_sub_hal_section_a Thinking out loud. LinuxCNC is part of the e-stop system. It should act like an e-stop button if it detects a fault, or it should detect an e-stop so it can stop motion. LinuxCNC should not be a centralized e-stop controller, but a peer to any other e-stop source such as an e-stop button, or VFD or other. For example, if a VFD detects a fault it should activate its fault relay which is connected to the e-stop loop. LinuxCNC will see the e-stop signal and react appropriately. Now I just need to take the time out to try to put it into practice. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MA860H Stepper Driver
On 01/16/2015 06:48 AM, Dave Cole wrote: > That looks identical to this Leadshine item. > > 151414015351 The pin out is different so the PCB is different for some reason. > Leadshine has a good reputation for stepper drivers. They also make a > 120 VAC input stepper driver with 8+ amps of output. I found the DM1182 and DM2282 but they are significantly more expensive. The MA860H was cheap enough to to try out and not feel too bad if it didn't work out. The DMs have some nifty features which would be fun to play with, someday. > > If you have the time to wait you can get some bargains directly from > China suppliers. > > Dave When I ordered my drive I knew how long it might take to ship, but 2.5 weeks is still a long time to wait. > > > On 1/15/2015 9:40 PM, Kirk Wallace wrote: >> I just received one of these (2.5 weeks from China) as a possible >> replacement for my unipolar driver that keeps blowing out transistors: >> http://www.ebay.com/itm/331393094727 ... snip -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MA860H Stepper Driver
On 01/16/2015 08:52 AM, Kirk Wallace wrote: > On 01/15/2015 11:32 PM, Marius Liebenberg wrote: ... snip >> I did break one drive when I unplugged the motor while the drive was >> still under power. > > There was some chatter on the CNCzone/Tormach forum recently about > unplugging a fourth axis and killing the driver. Some people said they > do it all the time, which sees hard to believe. It came to mind that it > would be nice to have the connector latch interlocked with the drive > power so the drive is turned off well before the connector breaks output > contact. > Another issue that came up was that the motor connector (green 6 pin) had an affinity for burning up due to a resistive contact either at the screw clamp for the wire or at the pin and socket. One user replaced the connector with soldering wires directly to the board. Others used contact grease and or ferrules on the wire ends. http://www.digikey.com/product-highlights/us/en/weidmuller-wire-end-ferrules/3775 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] MA860H Stepper Driver
On 01/15/2015 11:32 PM, Marius Liebenberg wrote: ... snip > I use similar drives all the time and I put 110vdc on a 80vdc drive > the other week. The cover shows 80VAC max. which would be (80 * 1.4 =) 112VDC max. and shows 110VDC max on the cover. > I thought that the drives was cooked but when I tested it with the > correct voltage it was fine. It seems that hey have an input current > and voltage sensing circuit and will not damage easily. I took the cover off to see inside. I need to take some close up pictures to document the various bits. > Most of these drive originate from the same factory and my exerience > with them has been very good. Some of them does have a fuse on the > pcb. I looked for a fuse but didn't find one, although giving it more thought a fuse these days might look like a SMT resistor. I'll have to look closer. > I did break one drive when I unplugged the motor while the drive was > still under power. There was some chatter on the CNCzone/Tormach forum recently about unplugging a fourth axis and killing the driver. Some people said they do it all the time, which sees hard to believe. It came to mind that it would be nice to have the connector latch interlocked with the drive power so the drive is turned off well before the connector breaks output contact. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] MA860H Stepper Driver
I just received one of these (2.5 weeks from China) as a possible replacement for my unipolar driver that keeps blowing out transistors: http://www.ebay.com/itm/331393094727 The original drivers run at 45V and 8 amps, with NEMA42 motors with 2.5 Ohms per coil. The new driver can run at somewhere around 100V and 7.2 amps and the motor is wired for 5 Ohms bipolar. I did a brief test at 50V and a setting of 5 amps (1/4 stepping), with the sample stepper config, and so far so good. The original drivers make the motors sing, but this one is silent (except for the steps). There are no specs on the signal timing, so I'll need to play with this, as well as try the maximum amp setting at 7.2, and upping the voltage to 100V. I may need to get more to do Y and Z. If anyone has used these drivers with NEMA42 motors and has any addition information or advise, please let me know. One thing that comes to mind. I looks like there is no overload protection, such as a power input fuse or breaker. It would seem prudent to add a fuse. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3 phase washing machine motor
On 01/09/2015 09:56 AM, andy pugh wrote: > On 9 January 2015 at 17:48, Kirk Wallace wrote: > >> Oops, I missed the exclusive nature of the link. I really wished that >> people would _not_ use "free" services. > > The pictures are on Picasa, but Google auto-redirect to Google+ if you > have a Google account. The files are still available on Picasa, but it > takes a bit of URL-wrangling to get there. > https://picasaweb.google.com/108164504656404380542/CNCUnsorted?noredirect=1#6047572913175439346 > > (note the manually-inserted "noredirect=1") > Sorry for my comments Andy. This shows how frustrating it can be to protect oneself even when being fairly paranoid. I suppose any Google search links to my self-hosted pages have the same problem. Whatever happened to "Don't be evil". -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3 phase washing machine motor
On 01/09/2015 07:07 AM, Robert Ash wrote: > Not much good for myself not being a "Googlian" Have to register for access > to "Plus" stuff, not gonna happen Oops, I missed the exclusive nature of the link. I really wished that people would _not_ use "free" services. They certainly are not free to the user or those around them. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3 phase washing machine motor
On 12/24/2014 04:53 PM, Gregg Eshelman wrote: > On 12/24/2014 11:42 AM, Robert Ash wrote: >> I have a good relationship with a salvage man here and would like >> to see an image of this motor. I may have missed it if posted >> before. If I can recognize it I can pull one for my own education. >> I get treadmill motors with drives as well as other drive train >> parts from him very reasonably. Here is my version: http://www.wallacecompany.com/machine_shop/wash_motor/wash_motor_side.jpg http://www.wallacecompany.com/machine_shop/wash_motor/wash_motor_plate.jpg > My brain is still going *doink* over the concept of a 17,000 RPM > motor in a washing machine. The motor and gearbox would need to have > some major acoustic engineering to not drive all the cats and dogs > crazy. I assume there is a long belt that goes all the way around the drum for a washer or dryer and there is no gearbox. My motor ran very quietly on the bench. I have cut the arms off and turned the stubs down to the motor's OD, so it looks like a proper motor now. I just need to figure out what to use it on. Andy's version is here: https://plus.google.com/photos/108164504656404380542?pid=5832689638364145858&oid=108164504656404380542 https://plus.google.com/photos/108164504656404380542/albums/5747722155741347649/6047572913175439346?pid=6047572913175439346&oid=108164504656404380542 I saw this while I was there: https://plus.google.com/photos/108164504656404380542/albums/5951817748876519665 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Modbus
On 12/18/2014 03:53 AM, 77dab wrote: > Hi all, > I have on my hand some mitsubishi VFD with 550w winches. > I would like to try to move them using LinuxCNC. > the thing is not meant to be Real time, and I've read the modbus module > lives in User space and it's not RT. > So, my question: > Since it isn't RT, can I drive the rs485 thru a USB->rs485 converter, > using a laptop? > > Thanks, Davide. In my opinion, USB has a lot of Windowy Plug-N-Playey Consumery fluffy overhead that doesn't help with machine control. My guess is that a regular serial port would be much better. Other than that, I have no opinion. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Using washing machine motor
On 12/18/2014 09:22 PM, richsh...@comcast.net wrote: > Our Sears washing machine got replaced and I got the motor. Says 820W > 3 phase, 195V, 320 hz, 17,000 rpm. Anyone messed with one of these > with a vfd or a vector drive? It's tiny, seems to be well built, > shame to put it in the bin without seeing what can be done with it. > -- Does it look like this one? If so, I think it would make a fine spindle motor. I've only run this one with a VFD on the bench, but I can't see why it wouldn't work well. http://www.wallacecompany.com/machine_shop/wash_motor/wash_motor_side.jpg http://www.wallacecompany.com/machine_shop/wash_motor/wash_motor_plate.jpg -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe/turning CAM solutions
On 12/13/2014 08:25 AM, Marius Liebenberg wrote: > Tom > You only really need a CAM package for parts that are contoured. I.E. > not regular OD, Face, Id and such. For the standard stuff I use NGCGUI > and LatheMacro. Both of these are found under the example configs. > > For the contour stuff I use Cambam. The lathe module is not very strong > and does not cut ID curves. It does the job for me though. All the other > things can be done with the two options I mentioned. I use both of them > all the time. The Lathemacro tool from Andy Pugh is very good for > cutting tapers and radii. That reminds that QCAD and dxf2gcode can be used to create lathe tool paths: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_LinuxCNC_G-Code_Generators#Dxf2gcode_import_a_2D_DXF_file_and_produce_G_code As well as Inkscape: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?InkscapeHowto http://www.linuxcnc.org/emc2/index.php/english/forum/31-cad-cam/1650-gcodetools-inkscapes-cam-extension See links under "Using LinuxCNC": http://wiki.linuxcnc.org/cgi-bin/wiki.pl http://hackaday.com/2013/10/12/cnc-software-toolchain-using-only-open-source-software-2/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 4 axis simulation
On 12/08/2014 04:04 PM, andy pugh wrote: > On 8 December 2014 at 23:27, linden wrote: >> Yes just the flash screen no error > > That's rather unusual. > > dmesg might give some clue, but I wouldn't bet on it. > > Try starting LinuxCNC from the terminal (just open a terminal and type > "linuxcnc", you might get a bit more output. > You might try looking at DEBUG in the EMC section of the documents here: http://linuxcnc.org/docs/html/config/ini_config.html#sub:EMC-section I found this at the mentioned link: // factored out from emcglb.h so subsystems not requiring the // emcglb.h defines may include them as well #define EMC_DEBUG_CONFIG0x0002 #define EMC_DEBUG_VERSIONS 0x0008 #define EMC_DEBUG_TASK_ISSUE0x0010 #define EMC_DEBUG_NML 0x0040 #define EMC_DEBUG_MOTION_TIME 0x0080 #define EMC_DEBUG_INTERP0x0100 #define EMC_DEBUG_RCS 0x0200 #define EMC_DEBUG_INTERP_LIST 0x0800 #define EMC_DEBUG_IOCONTROL 0x1000 #define EMC_DEBUG_OWORD 0x2000 #define EMC_DEBUG_REMAP 0x4000 #define EMC_DEBUG_PYTHON0x8000 #define EMC_DEBUG_NAMEDPARAM0x0001 #define EMC_DEBUG_GDBONSIGNAL 0x0002 #define EMC_DEBUG_PYTHON_TASK 0x0004 // not interpreted by EMC. #define EMC_DEBUG_USER1 0x1000 #define EMC_DEBUG_USER2 0x2000 #define EMC_DEBUG_UNCONDITIONAL 0x4000 // always logged #define EMC_DEBUG_ALL 0x7FFF /* it's an int for %i to work */ // debug prefix flags #define LOG_TIME 1 #define LOG_PROCESSID 2 #define LOG_FILENAME 4 // and line -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Cameras
Just a reminder, in my experience, auto focus and exposure can be a problem. Vision software often works by comparing changes in pixels between one frame and the next, or differences in pixels within the same frame. One should look for a camera that doesn't have auto focus or has a manual setting for zoom, focus, exposure, color balance or anything else that might be done automatically. That way the vision software can better distinguish what has changed and what has not. Don't forget to provide consistent lighting too. Also, most webcams use a wide angle lens with lots of distortion. It's better to have a camera with a C or S mount, so one can mount a lens that is appropriate for the application (maybe a telecentric lens). So a camera made for machine vision would be best, or one made for astro-photography or microscopy. Adding or removing filters may be appropriate. It depends on what kind of light is useful for the application (monochrome, narrow wavelength, polarized). Astro-photography cameras often have the normal IR filter removed, so is another reason to look at this class of camera for machine vision. Basically speaking, common consumer cameras are generally not very good for machine vision. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] WJ200 driver on 2.6
On 12/02/2014 06:25 PM, Jeremy Jones wrote: > Kirk, thanks for the help. > > I assumed that Modbus was a more capable way of communicating with the VFD. > Maybe that assumption is wrong and now technology has moved past it. If > it's not going to be be any more accurate or provide any more feedback from > the VFD to lcnc then maybe it's pointless. I was going to leave it till > later but then I noticed that the newer version had support for it. I just > thought there were extra benefits there that weren't available with just > the I/O of the Mesa board (which would be a heck of a lot easier). I looked at the manual: http://www.hitachi-america.us/supportingdocs/forbus/inverters/Support/WJ200_Instruction_NT325X.pdf and saw that there is no shortage of available registers. Starting with B-24, one can see that there are more than few registers (all the way to B-48) available for configuring, monitoring and running the VFD, so Modbus offers a lot of capability. You certainly can effectively run the VFD with the control terminals, but if you want more, Modbus or the USB port are options. It should not be too difficult to expand the existing wj200_vfd component to support any of the registers listed. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] WJ200 driver on 2.6
On 12/02/2014 02:56 PM, Jeremy Jones wrote: > Ok. The code looked similar but I figured it had nothing to do with what I > need to do. I'll sit down later and figure it all out when I have time. Giving it a brief look, you just put: "loadusr wj200_vfd" in your .hal file. Or to play with a bare bones setup, from a terminal window, invoke halrun. Then at the prompt "loadusr wj200_vfd". For me, I got a permission error, which means you need access rights to the serial port. I typed "quit", then tried again with "sudo halrun", then the loadusr bit. After that you can type "show" to see all the pins and such available from the wj200_vfd component. From here you can create a thread, add the component to the thread and start it. Use setp to set pins or parameters. Looking in the comp source, it looks like the serial port settings are hard coded to: ... /* modbus connection settings*/ char *device = "/dev/ttyS0"; int baud = 9600; char parity = 'N'; int data_bits = 8; int stop_bits = 1; modbus_t *ctx; ... So you will need to put an RS-485 adapter on your serial port 0 and run the two wires to your VFD's SP (Serial Positive) and SN (Serial Negative) terminals. Then make sure the VFD serial port parameters match the settings above. If the serial communications is working, you should be able to enable and other pins from your halrun session, or set up you .hal file to make the pin connections to LinuxCNC/AXIS pins. If needed, the serial port can be checked using minicom and a jumper on serial port pin 2 and 3. Set minicom for software handshake. Then anything you type should echo back to your terminal display. That's what comes to mind so far. You probably need to run down the permission issue to run the component as a normal user. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gs2_vfd Hal component
On 11/30/2014 11:15 PM, Mark Johnsen wrote: > Sebastian (and others) - thanks for the reply. I have a little voice in my > head since the Houston LinuxCNC Fest, "Update manuals where you can..." > :-) > > I'll make sure I get the cable pinout included in the manuals as I googled > a 9-pin dsub serial port to determine if pin 2 or 3 is the Tx or Rx, only > to find out after the fact that guessing would have been just as good as > the google images of 9-pin dsubs have no consistency. Some images show pin > 2 as Tx, some show pin 2 as Rx. That's no help... For an RS-232 connection (with software handshake selected), there are only three wires used; Rx, Tx, and ground. The VFD manual shows the pin-out on the VFD side. There are plenty of sources for PC serial port pin-outs. You can unplug the VFD side and jumper the Rx and Tx pins to loop the signal back. Minicom can be used to send data and check for its echo.RS-485 gets more complecated, but can also be on a 9-pin D-sub. Modbus gets more complicated because you won't get a response until the link is working (there is a broadcast packet that can be handy). There are sniffers you can use to help troubleshoot, maybe WireShark? It has been a while since I have played with this, so I'm a bit rusty. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tired of spending the entire day at the troubleshooting bench?
On 12/01/2014 04:51 AM, Mark Wendt wrote: On Mon, Dec 1, 2014 at 7:47 AM, andy pugh wrote: On 1 December 2014 at 11:41, Marius Liebenberg wrote: Damn that is neat. Now I have to spend all day interpreting an enormous data file of test results :-) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto There's a perl script for that. ;-) Mark HAL can do it too. I wrote a GladeVCP application and HAL component that automatically tests a control board. The component invokes a sequence of commands and checks for a response. You press start and it goes through the tests. If the response LEDs are all green at the end, then the board passes. There is also a manual mode for trouble shooting. The board goes on a partial bed-o-nails to make changing boards a little easier. (The attached screen shot is of the Glade layout, so looks a little funky) -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gs2_vfd Hal component
On 11/30/2014 08:46 PM, Mark Johnsen wrote: > Darn it. Operator error. I didn't have the P9.02 set to 03 like I > thought... Changed that and the gs2_vfd component loaded in halrun. > Cool... Now I can play with it and see what else I can mix up... Sorry to > bother you all. I'm glad you got it going. Please, let us know how you are progressing. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe spindle bearing problems
On 11/29/2014 04:01 PM, Gene Heskett wrote: On Saturday 29 November 2014 14:23:01 Stuart Stevenson did opine And Gene did reply: seals create a lot of heat That is a problem I have never had unless the seal was bone dry, in which case it will quickly self-destruct anyway. Wet seals that are properly sized don't get hot. Nor do they wear out for the equ of 200k miles. If that is a problem, then the Christian Science oiling method isn't working, and I'd rig it like Andy has pix of at a link in a recent previous msg. The drilled holes I would aim to enter behind the bearing but inside the seal, so both the seal stays wet, and the bearings get slowly flushed. My guess is that seals on slow speed and small diameter shafts work well, but maybe not for high speed spindles and large diameter lathe spindles. The Timken manual: http://timken.com/en-us/products/Documents/Super-Precision-Bearings-for-Machine-Tool-Applications-Catalog.pdf shows an example spindle with oil slingers, one on the outer side to keep the coolant and dirt out, and one on the inside to keep the oil in. Attached is a slightly embellished figure. and an excerpt: ... HOUSING SEALS A labyrinth combination of slinger and end cover provides a highly effective seal against the intrusion of foreign matter. This seal is suggested for use over a wide range of speeds. For slower-speed applications, a combination of slinger and a commercial contact- type seal is usually employed. Slingers should be machined all over to assure true-running. Their diameters should be concentric with the bore. The outside diameter of the slinger is often tapered to throw off cutting compounds, coolants, etc., from the point at which such liquids may enter the spindle. A drip or run-off groove adjacent to the open lip of the end cover is highly desirable and practical. The axial clearances of the internal faces between slinger and end cover should be about 1.600 mm (0.0629 in.). The fi rst radial clearance opening on any design through which liquid may pass should be made very close, about 0.089 mm (0.0035 in.) on a side. The inner radial clearances should be between 0.380 mm (0.0149 in.) and 0.190 mm (0.0075 in.). ... -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Notes on PWM and FETs
On 11/29/2014 12:29 AM, Karlsson & Wang wrote: > I would reccomend a book in power electronics I read "Power > Electronics: Converters, Applications, and Design" at the university. > The most important part to understand is the loss calculation, then > you know why you need a good gate driver. Thank you for the book recommendation. I have found a lot of good information trolling through manufacturer's documents and various websites. This started as just trying to scratch an itch -- bare bones FET and motor, but I tend to get drawn in while making progress. Diode reverse recovery is > also important. I assume you already know why you need an isolated > power supply to the high side driver? Oh yes, but I kind of resent having to wiggle the high side to keep the driver charged. I'm tending to think, since a tiny AVR is so cheap, I could add one to maintain the high side supply, and maybe do other things since it is there. I like the idea of being able to go right up to 100% duty without giving it a thought. Another thing the AVR could do is monitor the current sensor. It seems that monitoring current is important for driver protection as well as possibly motor protection and torque control -- but, what current? Peak current seems important to prevent blowing out components. Average current is needed for motor load and driver over-heating. I guess I'll find out as I go. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Notes on PWM and FETs
On 11/28/2014 12:15 PM, Sven Wesley wrote: ... snip > Would it work better with an IRZL44N? It's popular in the Arduino community > for its logic level input. > http://www.edaboard.com/thread245565.html > http://forum.arduino.cc/index.php?topic=11565.0 > > I use it in a home made engine ECU to PWM a fuel gate and it works very > well. The IRLZ34 is what I had in by parts box. In looking at the specs, both parts look similar. I did try using a 5 Volt signal from the parallel port pin to a series resistor to the gate, and it worked fine. It just ran warmer than the other methods I tried. I'm hoping to try running the motor at full voltage, 90 Volts, but I'll need to order new FETS and diodes for that. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Notes on PWM and FETs
On 11/28/2014 09:29 AM, Kirk Wallace wrote: > Here is the start of my notes on playing with PWM and FETS. > > http://www.wallacecompany.com/machine_shop/LinuxCNC/pwm_fet/pwm_fet.html > I posted my second circuit at the link above. JK, I used your comment about using the gate resistor to adjust the gate speed. A small spike can be seen on the rising edge of the gate voltage, so I replaced the 22 Ohm resistor with a 68 Ohm and the rising edge now has a nice square corner. On the current sense trace, there seems to be a spike and ringing decay at the on and off events. The gain on that channel is turned up pretty high so I don't think the spike is large, but I could be wrong. The ramp will rise up just out of view at about 5 Amps average on the motor supply meter. I have to use a rag on the pulley when I try to load the motor and I can only slow it down a bit. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Notes on PWM and FETs
On 11/28/2014 10:17 AM, John Kasunich wrote: > May I make a suggestion? I post my work in order to get feedback. Thank you very much for your help. My next step, which I have yet to post, added a TC4422 after the opto-isolator. That is what is in the next scope picture. The FET ran with barely a hint of heating while under a load (one hand on the FET the other trying to stall the motor, not recommended, do _not_ do as I do, folks). The HCPL3150 looks like it combines the bits I have. I'll have to get some on order. The circuit only drives the motor in one direction and has no speed regulation, so isn't all that useful, but fun so far. I would like to work more on sensorless speed regulation, but my KBIC board already does this very well, and now that I'm not blowing out FETs anymore, I'd like to move on to BLDC motors. One nice thing about this setup is that someone with a decent electronic parts bin can touch some important bits of LinuxCNC in short order. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Notes on PWM and FETs
Here is the start of my notes on playing with PWM and FETS. http://www.wallacecompany.com/machine_shop/LinuxCNC/pwm_fet/pwm_fet.html -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe spindle bearing problems
On 11/28/2014 07:59 AM, andy pugh wrote: > On 28 November 2014 at 15:50, Kirk Wallace > wrote: >> In my opinion, grease should not be a first choice. Oil can lubricate >> just as well or better, and carries away heat and dirt > > Oil will fall out. These bearings are mounted in the faces of an > open-fronted box, and there are no seals as such either. > Sounds like a faulty design to me. I found the links I was thinking about earlier: http://timken.com/en-us/products/Documents/Super-Precision-Bearings-for-Machine-Tool-Applications-Catalog.pdf http://timken.com/en-us/products/Documents/Timken-Engineering-Manual.pdf http://timken.com/en-us/products/Pages/Catalogs.aspx -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe spindle bearing problems
On 11/28/2014 03:38 AM, Marius Liebenberg wrote: > Hi Robert > Thanks for the grease tip. I would have fitted normal wheel bearing > grease. I will see if I can find what you suggested over here or at > least something similar. In my opinion, grease should not be a first choice. Oil can lubricate just as well or better, and carries away heat and dirt. Grease holds heat and dirt requiring the bearing to be beefed up to compensate for the increased heat and wear. Timken, Torrington, Fafnir, whatever, used to have a very good design guide online, with a section for machine tool applications. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe spindle bearing problems
On 11/27/2014 09:18 AM, Pete Matos wrote: > Never heard of that lathe. Does it have an oil bath in the headstock like a > lot of lathes? Good luck man> Peace > > Pete I found on my lathe that the back gear is used as an oil slinger. The problem is that I don't use the back gear much, so the gearbox doesn't get oiled. I added a pump: http://www.wallacecompany.com/cnc_lathe/00053-1a.jpg http://www.wallacecompany.com/cnc_lathe/00054-1a.jpg -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC communication problem then motor start
On 11/27/2014 08:32 AM, Karlsson & Wang wrote: > A small value capacitor decrease the problem so I guess the > commutation spikes are the problem but driving a capacitive load is > not good. > > Nicklas Karlsson (My general view on noise) One should not expect to simply run a wire from a signal source to an input in a machine environment and expect it to just work. Machines tend to be electrically and magnetically noisy, and signal inputs tend to have very high impedance. It's like the cable is a bottle and wind is a noise source. Wind going over the end of a bottle will create a sound which can drown out any sound you need to hear. To fix this one can reduce the noise and/or increase the sound level of the signal. I found that AC line filters on VFDs or any switching power supply is pretty much required. I had spindle encoder noise on the far side of my lathe which was cleared up using AC mains filters on the VFD power inputs and ferrite beads on the motor leads, thus reducing the noise source. Sometimes an AM radio or oscilloscope probe can be used to scan for noise sources, but I usually just add the filters anyway. After reducing noise sources, the susceptibility for the bottle or rather cable to be affected by noise can be addressed. Shielding is the most obvious approach, but more often, line conditioning is the real issue. A bottle will make sound due to a pressure wave, starting from the top of the bottle and travels down to the bottom and bounces back. A wire will do the same thing, and the source of the reflected wave could be the signal itself as well as noise. One way to stop the pressure wave from reflecting is to put a hole in the bottom, changing the bottle's bottom from high impedance to low. There are many ways to configure a wire to handle a signal, generally through termination and filtering. Much of this has been worked out already, so the methods for handling the type of cable being used should be studied and put into practice. Another way to deal with noise is to boost the signal above the noise level. That is why RS-232, RS-422/485 run with a much higher voltage than USB, SPI or I2C. RS-422/485 use two wires, one with a positive signal, the other with a negative version of the signal. Noise affects both wires the same way, but the difference stays the same, so the noise is ignored. So for each signal: What is the nature of the signal? (driver and input) What is the nature of the wire? (impedance, configuration, termination, filtering) What is the nature of the noise environment? (suppression, shielding) What method best addresses the above? (which industrial standard) -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] NASA's 3D Printer
http://www.nasa.gov/content/international-space-station-s-3-d-printer/#.VHYN4dewfiE What, no bust of Yoda? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BLDC Comp
On 11/26/2014 08:51 AM, andy pugh wrote: > On 26 November 2014 at 16:38, Kirk Wallace > wrote: >> is there an option that tells bldc to output the pwm >> directly? > > No. > > I did consider adding a base-thread function that did phase-locked PWM > but decided that the frequency would tend to be impractically low. > > The Mesa cards have a 3-phase PWM module which is ideal, though. > I'm thinking more in terms of what I can do using my parts bins and junk pile. I have an IRAMS on hand, and HAL. I just need to fill in the bits in between. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] BLDC Comp
I'm playing with trying to run a 3P induction motor with bldc.comp. I set cfg=n which seems to just output three sine float values. I'm assuming that I could run these into three pwm comps then out to a set of half bridges, or is there an option that tells bldc to output the pwm directly? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Motor Resolvers
On 11/22/2014 12:49 PM, el cringo wrote: > Hi, > i just added pdfs for the current hw version. The eagle files are for > version 6.5.0. We once tried KiCad but we are a lot better with eagle. Thank you. I looked at your pdfs. I also installed the latest LinuxCNC ( 2.6 with Wheezy) on a PC and loaded Eagle 7, so I can open Eagle files now. It took a while to figure out Git Hub (I normally use Bitbucket) and downloaded your files. There really isn't that much magic in the hardware, except maybe the current feedback/limit bit. It seems the magic is in the software. I'm looking forward to watching your progress. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Motor Resolvers
On 11/22/2014 05:11 AM, Marius Liebenberg wrote: > Sounds like you are moving in the right direction with this project. I > for one will be watching with keen interest. > If you need any assistance with pcb layouts or testing, let me know and > I will gladly assist. > > On 2014-11-22 05:10, el cringo wrote: >> Hi, >> i am working with Rene on this project. >> For the next hardware version we are planning to support resolvers >> (3-8Vpp ref, 1-12Vpp sin/cos) and encoders/gms (ttl / 1Vpp / 11µA) with >> a single interface. ... snip I was hoping to get up to speed with this project: https://github.com/rene-dev/stmbl But I need to use Ubuntu 10.04 on my PC (for development) and it looks like the Eagle files are only compatible with the latest Eagle version which doesn't load on 10.04. It would be better for a broader audience if there were a doc directory with photos and PDF or open source versions of the schematics. Personally, I would not use Eagle but rather an open source program such as gEDA or KiCAD. In the past there have been other motor driver projects that have come and gone. It would be nice to gather any links covering DIY drivers on the wiki. I started a page a few years back: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Bridges_-_Half%2C_Full%2C_Three_Phase which has been added to, but could use some updating. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Motor Resolvers
On 11/20/2014 09:25 AM, andy pugh wrote: ... snip > Yes, a more powerful MCU would be better, and it so happens that Mesa > and Pico sell exactly that all ready to go. > > Why will nobody believe me when I say that my experiment was rubbish? > Because Arduinos are so cute. I seem to recall, to get fast PWM, I had to use Timer1 and not use the Arduino PWM library. I wonder if the resolver decoder might be improved in a similar fashion? I haven't had the time to study Andy's code, but it may already be optimized. There are many new AVRs (and ARMs) that have plenty of higher resolution timers. Maybe there are too many options. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Motor Resolvers
On 11/18/2014 10:45 AM, Ben Potter wrote: ... snip > I have a couple of Andy's boards left. I had noise issues with them that is > more than likely how I was using them. As such I ended up picking up a > commercial drive for the motor I was using. > KW: If you want them, I'd be happy to send them on. Thank you Ben, I'm in California, so they might not be worth shipping that far. I'm planning to play in HAL on a PC and on breadboards for now. I'm also still trying to fix my stepper drive. It looks like the current limit circuit is bad and I'm still blowing out power transistors when I power up. I need to rig up a board on my bench and scope out what's going on. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Motor Resolvers
On 11/18/2014 08:43 AM, andy pugh wrote: > On 18 November 2014 16:31, Kirk Wallace wrote: >> Andy, it has been a few years since this page changed: >> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ResolverToQuadratureConverter >> >> How well is this working? I'm looking at getting some BLDC motors with >> resolvers for commutation. > > I am no longer using the Arduino, it was an interesting experiment > but the Mesa 7i49 works a lot better. > I have little doubt about the 7i49 working better, but it has six channels and I may need a single motor or stand alone solution. I will have screw encoders for table position, so I just need commutation sensors. I haven't fully researched the problem yet, but if an Arduino or more likely an AVR solution is possible at $15 - $25 per motor, it might be worth getting the motors. Another option is to add Hall sensors and not use the resolver, or just not get the motors. The more I think about it, adding Halls seems to be the way to go. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Motor Resolvers
Andy, it has been a few years since this page changed: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ResolverToQuadratureConverter How well is this working? I'm looking at getting some BLDC motors with resolvers for commutation. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Question re using magnetics for work holding
On 11/12/2014 07:52 AM, Todd Zuercher wrote: ... snip > > Not sure how they turn them on/off. Some sort of cam system that > separates the magnets from the conductive surface internally. ... snip I believe the magnetic bases like this: http://littlemachineshop.com/Products/Images/480/480.1593.jpg contain two magnets. One is a cylindrical magnet in the center of the base with an attached handle. The other surrounds the center magnet. When you turn the handle to Off, the two fields are phased at 180 degrees (magnetically not geometrically) and cancel each other. The On position aligns the fields and combines the magnetic force. A magnetic release brake is similar except an electro-magnet is used to cancel the field from the permanent magnets: https://www.cst.com/Applications/Article/Magnetostatic-Simulation-Of-A-Magnetic-Brake There are a lot of options for manipulating magnetic fields. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Off Topic: Shop Lighting
This looks interesting, but I have no idea how well these dimmable T8 LEDs work. http://www.ebay.com/itm/121227773225 another option is to use a bunch of E26 screw base bulbs which are getting fairly cheap these days. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A beginners question about E-Stop and Charge Pumps
While following this thread, I found these links: http://madpenguin.ca/blog/2012/02/16/an-emergency-stop-circuit-with-emc2/ the above has a brocken link to here: http://www.hs-compliance.com/uploaded/documents/THE%20EMERGENCY%20STOP%20-%202012%20ver%202.0.pdf For spindles, Warner makes a magnetic release brake which brakes when power is cut: http://www.altraliterature.com/pdfs/FB%20Series-Permanent%20Magnet%20Brakes.pdf These fail to a safe condition. eBay can be a good source. A little less fail-safe is braking an AC motor with a DC current: http://www.homemetalshopclub.org/news/sep01/sep01.html http://www.electrical4u.com/induction-motor-braking/ There should be a version for router motors. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Unable to get Nvidia Graphic Card working with nvidia drivers .
On 11/07/2014 10:30 AM, Eric Keller wrote: > Vesa worked fine. The open source Nvidia drivers were not good for > latency. You may wish to go with an interface that doesn't use 3d. I > believe that the problem with the Nvidia system is that they want a > specific kernel layout and it doesn't work with the RTAI kernel, but I > can't be sure (Thinking more this may not affect boot problems, but anyway...) I have a very limited understanding of this, but here is my take on it. I think many LinuxCNC video issues are due to OpenGL, which is used for the Gremlin backplot application. OpenGL is supposed to be a more direct interface to the video hardware. It is a library of functions that allow talking to the video hardware to create shapes and shading. Unfortunately, the manufacturers control the hardware, and they don't usually like to share their ... well anything but your money. So, we have to live with their closed drivers that don't cater to Linux, or try dodgy reverse engineered open drivers, or bypass the issue. For LinuxCNC there are two options for OpenGL. The common one is: libgl1-mesa-glx which is an API that talks to video hardware (BTW it's a different Mesa). The other is: libgl1-mesa-swx11 which is a software only version that doesn't talk to video hardware and is also much slower. One can try running GLXgears and if it crashes, switch to the swx11 version. To see which version is active, open Synaptic, type "libgl1" into the Quick Search box, and see which libgl1 from above has the green box next to it. If you decide to change your active libgl1, Mark the inactive version and Apply. You should get a message indicating that some files will be uninstalled. This is because each version is mutually exclusive. Make note of the files you unloaded in case you have trouble putting things back the way they where. Hopefully, someone that knows better will correct any above misinformation. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] New refit
On 11/06/2014 03:06 PM, Marshland Engineering wrote: > A bit off topic but I would like to get this correct before I start. > > I have bought a ZAY7045 mill > http://czdm45.trustexporter.com/product/detail/286/533904.htm > > I have also bought > Ametek MCG DMC-6D Brush Type PWM Servo Drive Amplifier 6amp 80vdc > and > Ametek Nema23 PM Brushed DC Servo Motor w/ 5000 line Encoder 60vdc > from Ebay > > I'm probably going to buy these ball screws. Pitch 5 mm. > > http://www.aliexpress.com/item/Free-shipping-Rolled-1605-Ball-screws-L450-950-1000mm-C7-Anti-Backlash-Rolled-Ballscrew-3pcs-ballnut/1192542434.html > > My thoughts for a rapid are 10 m/min. This gives me a gear ratio of around 2:5 > > The motors are approx 400w Continuous and 60oz/inches. My brain is bit rusty > and there are so many incorrect formula on the web, I can't seem to get the > calcs correct to see if these are powerful enough. All my cals show very low > power levels. Shooting from the hip, I would tend to go ahead and install the ballscrews, then mount a temporary pulley to a screw, wind a short rope on it, hang a weight on the rope, then see what motion you get. Add weight until you get what you want. You might consider adding a load to simulate cutting loads and/or heavy workpieces. The torque you need can be calculated with: torque = weight * pulley radius Then go shopping for motors and drivers, oops, too late :) Or, select a pulley ratio that provides the needed torque, and live with the rapid you wind up with. Just a thought. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizouka Mill
On 10/31/2014 03:36 PM, Gene Heskett wrote: ...snip > That could be an SOA failure, where a bug spends too much time in the > transition between on and off and punches thru. > > TBT, most darlingtons are too slow, particularly for power drivers, to be > suitable for such usage, and I would expect a relatively high failure > rate. > > Servo, or steppers? > > Cheers, Gene Heskett > NEMA42 steppers at 45V and 8 amps. The PWM sounds like it is in the audio range or pretty close. These drives have worked pretty well for the handful of years that I have had the machine, plus it is around thirty years old. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Shizouka Mill
On 10/31/2014 09:53 AM, Kirk Wallace wrote: > In case anyone might be interested, I mentioned on IRC some issues I had > with a blown out unipolar drive: BTW, the tool arm also stopped working. I thought the 4-way valve here was the problem: http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_valve-1a.png Looks just like: http://www.ebay.com/itm/like/151454741685 But it turns out the cylinder seals were so bad that it could not hold enough pressure to move. The valve is where the cylinder normally vents, so I thought the valve was the problem. http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_cylinder-1a.jpg Allenair still provides cylinder kits, so I have one on order. The valve o-rings are generic, so I replaced those, but the u-rings are special and I haven't find any. The x-ring is generic, but I didn't want to order a set of 100. The x and u-rings seemed in decent shape, so I put them back in. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Shizouka Mill
In case anyone might be interested, I mentioned on IRC some issues I had with a blown out unipolar drive: http://www.wallacecompany.com/machine_shop/Shizuoka/1-1a.jpg http://www.wallacecompany.com/machine_shop/Shizuoka/Bandit_Stepper_Driver.png http://www.wallacecompany.com/machine_shop/Shizuoka/Shiz_TIP36-1a.jpg (Darlington = two xstrs on one mini pcb, TIP36C PNP pair on high side for PWM current control on AA and BB, TIP35C NPN pair on low side for motor coil stepping on A1, A2, B1, and B2) I got the last of the parts yesterday and installed them to the Y drive and it works fine now. Unfortunately, the Z drive went out while testing. This time I knew what to look for and had spares, so I repaired the Z drive in short order. I hope there isn't another issue causing these drives to go out. It seems that a transistor shorts out, taking the other high or low side transistor out, then the fuse. On the other hand, if there was an overload from the motor, I suspect just the fuse would blow. (BTW, TIP35/6 = 25A, Fuse = 12A Fast Blow) In looking at how Darlington transistors work, I'm surprised that two of the same transistors are used for the first and second stage (hFE = 1600). I suppose transistors are cheap enough that there are no savings in using a smaller transistor for the first stage. If another transistor blows out, I may try a modern single module Darlington like these: http://www.digikey.com/product-detail/en/2SD2083/2SD2083-ND/3661817 http://www.digikey.com/product-detail/en/2SB1383/2SB1383-ND/3929429 (hFE = 2000, one high side, one low side) Although, I really don't want to put much more effort into these old drives. Plus the circuit traces are pulling up when I remove the old parts. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] The Warm Glow of Mach 3
On 10/30/2014 06:09 PM, dave wrote: ... snip > Well, Russian built rocket engines incinerated more than a few Russian > cosmonauts. > Apparently, when they work they work well...and when they fail . > opps! At least we were not launching people. ;-) Going back to traditional rockets with a crew capsule on top restored a tried and true escape system. I think if a crew had been on the Wallops rocket, the escape system would have kicked in and the crew would only have suffered the indignity of being ungracefully plucked from the ocean. I certainly would rather be on top of the rocket than close by on the ground. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe conversion with Mesa 5i25 / 7i76
http://theroadtothehorizon.net/photo/Google%20-%20don%27t%20be%20evil.jpg On 10/30/2014 09:24 AM, Dave Cole wrote: > Google is like the Borg you will be assimilated resistance is > futile. ;-) -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Error on startup Lcnc
On 10/29/2014 09:36 AM, Jon Elson wrote: > On 10/29/2014 02:56 AM, Tomaz T. wrote: >> I found out that it was entirely hardware problem, because after moving >> parallel pci card to the other pci slot, it finally started to work. >> >> > Hmmm, very strange! Well, glad you got it to work! > > Jon I think changing slots changes where PCI assigns where the card's base and extended address space? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] The Warm Glow of Mach 3
This subject line caught my eye, but it's a different Mach 3: http://www.nasa.gov/aero/the-warm-glow-of-mach3/#.VFEKydewfiE BTW, if you want to see other NASA e-mail announcements and picture of the week: https://public.govdelivery.com/accounts/USNASA/subscriber/new?preferences=true#tab1 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Error on startup Lcnc
On 10/28/2014 01:43 AM, Tomaz T. wrote: > Anyone have ideas what could be wrong, and causing me this error on Lcnc > startup: > > Debug file information: > Can not find -sec APPLICATIONS -var DELAY -num 1 > insmod: error inserting > '/usr/realtime-2.6.32-122-rtai/modules/linuxcnc/hal_ppmc.ko': -1 Operation > not permitted ... snip A wild guess might be that the PPMC board is not powered up or not connected? There is a Pico diagnostic program you might try. http://pico-systems.com/codes/univpwmdiags.tgz -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Numeric entry with touchscreen and Glade
On 10/27/2014 06:32 PM, andy pugh wrote: > I seem to have found an earlier point to stall at. > > The application is a GUI for my hobber. I want to be able to enter DP > in the DP box, or Mod in the Mod box. > If I enter a Mod number I want the DP box to be updated to show the > equivalent DP, And vice-versa. > > Unfortunately this ends up in an infinite loop of calls, as the change > to one invokes a callback that changes the other which invokes a > callback. ] > > In VBA you get round this with Application.ProcessEvents = 0 (IIRC). > > Does anyone know how to do the equivalent thing with Python and Glade. > (Using Glade to create the GUI means no chance to grab the event > handler ID at event connection time) > > module.handler_block_by_func(module.on_change) > dp.handler_block_by_func(dp.on_change) > > Looked like it might work, but doesn't. > In my UI the DP entry gets processed with the on_dp_entry_activate callback. The Mod gets processed with on_mod_entry_activate. Part of the processing of one entry is to calculate and update the other entry display. Changing the other entry from the calc doesn't cause an activate, so there is no looping. It may be that looking at what event is being used for your entry might shed light on your loop. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Versa
On 10/26/2014 11:04 AM, Kirk Wallace wrote: > On 10/25/2014 08:33 PM, Kirk Wallace wrote: >> On 10/25/2014 08:14 PM, Kirk Wallace wrote: >>> On 10/25/2014 07:12 PM, TJoseph Powderly wrote: >>>> On 10/25/2014 09:05 PM, Ed wrote: >>>>> On 10/25/2014 07:29 PM, Kirk Wallace wrote: > > ... snip[ > >>> Thank you Ed and Tom. I'll post pictures and dimensions tomorrow >>> morning. I recall the seal being 1" OD, .75" ID and .103" wide, but I'll >>> make sure before I post the pictures. > > ... snip > > Here is the u-seal picture and dimensions of the slot that it fits into. > http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_valve-1a.png > http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_valve-1a.svg > I replaced most of the seals and put a few decent ones back in. When I tested the valve, it behaved the same -- leaking a lot of exhaust air and not moving the arm. Further investigation indicated the cylinder seals are leaking badly. http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_cylinder-1a.jpg The left half is the air side which pushes or pulls the arm. The right half has hydraulic fluid and a petcock that sets the air push/pull rate and damps motion. Now I'm another week out of commission to order and wait for more seals. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Versa
On 10/25/2014 08:33 PM, Kirk Wallace wrote: > On 10/25/2014 08:14 PM, Kirk Wallace wrote: >> On 10/25/2014 07:12 PM, TJoseph Powderly wrote: >>> On 10/25/2014 09:05 PM, Ed wrote: >>>> On 10/25/2014 07:29 PM, Kirk Wallace wrote: ... snip[ >> Thank you Ed and Tom. I'll post pictures and dimensions tomorrow >> morning. I recall the seal being 1" OD, .75" ID and .103" wide, but I'll >> make sure before I post the pictures. ... snip Here is the u-seal picture and dimensions of the slot that it fits into. http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_valve-1a.png http://www.wallacecompany.com/machine_shop/Shizuoka/shizuoka_arm_valve-1a.svg -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Versa
On 10/25/2014 08:14 PM, Kirk Wallace wrote: > On 10/25/2014 07:12 PM, TJoseph Powderly wrote: >> On 10/25/2014 09:05 PM, Ed wrote: >>> On 10/25/2014 07:29 PM, Kirk Wallace wrote: >>>> My Shizuoka mill has a pneumatic valve block with a Versa valve (for the >>>> tool arm in/out) that looks just like this one: >>>> http://www.ebay.com/itm/161456516453 >>>> >>>> The seals have hardened and need to be replaced. I can find the o-rings >>>> and the X-rings. BTW here: >>>> http://www.theoringstore.com/ >>>> >>>> But I haven't been able to find the u-ring seals that are on the ends of >>>> the shuttle. Like this: >>>> http://www.theoringstore.com/index.php?main_page=index&cPath=172_997_1011 >>>> >>>> Has anyone worked on these and knows which part to get? >>>> >>>> Thank you. >>>> >>>> >>> >>> When you say shuttle do you mean piston of the cylinder? >>> >>> I deal a lot in seals of that type, get me: >>> >>> Seal OD (bore of cyl ) >>> Seal ID (diameter at bottom of groove) >>> Seal width >>> >>> Ed. > ... snip > >> and note any reinforcement ( some cup seals have metal bands or ring >> springs in addition to the soft bit ) >> oh and if you use any lube in the air (viton vs butyl vs rubber can react ) >> pix is always good >> tomp tjtr33 > > Thank you Ed and Tom. I'll post pictures and dimensions tomorrow > morning. I recall the seal being 1" OD, .75" ID and .103" wide, but I'll > make sure before I post the pictures. > > Instead of shuttle, I think I meant to call it a bobbin which actually > may be a hydraulics term. The valve body has a .43" diameter rod which > has a short 1" diameter piston screwed to each end. Each piston is > driven by a solenoid. I need the two piston seals. > Ugh, I think I finally got the correct word... SPOOL -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Versa
On 10/25/2014 07:12 PM, TJoseph Powderly wrote: > On 10/25/2014 09:05 PM, Ed wrote: >> On 10/25/2014 07:29 PM, Kirk Wallace wrote: >>> My Shizuoka mill has a pneumatic valve block with a Versa valve (for the >>> tool arm in/out) that looks just like this one: >>> http://www.ebay.com/itm/161456516453 >>> >>> The seals have hardened and need to be replaced. I can find the o-rings >>> and the X-rings. BTW here: >>> http://www.theoringstore.com/ >>> >>> But I haven't been able to find the u-ring seals that are on the ends of >>> the shuttle. Like this: >>> http://www.theoringstore.com/index.php?main_page=index&cPath=172_997_1011 >>> >>> Has anyone worked on these and knows which part to get? >>> >>> Thank you. >>> >>> >> >> When you say shuttle do you mean piston of the cylinder? >> >> I deal a lot in seals of that type, get me: >> >> Seal OD (bore of cyl ) >> Seal ID (diameter at bottom of groove) >> Seal width >> >> Ed. ... snip > and note any reinforcement ( some cup seals have metal bands or ring > springs in addition to the soft bit ) > oh and if you use any lube in the air (viton vs butyl vs rubber can react ) > pix is always good > tomp tjtr33 Thank you Ed and Tom. I'll post pictures and dimensions tomorrow morning. I recall the seal being 1" OD, .75" ID and .103" wide, but I'll make sure before I post the pictures. Instead of shuttle, I think I meant to call it a bobbin which actually may be a hydraulics term. The valve body has a .43" diameter rod which has a short 1" diameter piston screwed to each end. Each piston is driven by a solenoid. I need the two piston seals. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Versa
My Shizuoka mill has a pneumatic valve block with a Versa valve (for the tool arm in/out) that looks just like this one: http://www.ebay.com/itm/161456516453 The seals have hardened and need to be replaced. I can find the o-rings and the X-rings. BTW here: http://www.theoringstore.com/ But I haven't been able to find the u-ring seals that are on the ends of the shuttle. Like this: http://www.theoringstore.com/index.php?main_page=index&cPath=172_997_1011 Has anyone worked on these and knows which part to get? Thank you. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Toolchanging (was Mach3 to LinuxCNC)
On 10/24/2014 02:55 AM, andy pugh wrote: ... snip > And it might not be as simple as E-stop. (As an example, my Z axis is > a moving table. It drops when the power goes off. I wouldn't want that > to happen part way through a tool-change if I had a rack toolchanger, > so the correct response to a failed tool-release or loss of air would > not be to e-stop in that situation) ... snip It sounds like you need one of these: http://www.warnerelectric.com/ers-series-brakes.asp My lathe has one for the spindle (top two pictures): http://www.wallacecompany.com/cnc_lathe/HNC/ As you probably know, servo motors are available with magnetic release brakes built in. The Tormach mills use them on the Z axis. If the power goes out, e-stop trips, or watchdog barks, the machine stops instantly. The magnetic engage clutches are handy too. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gvcpDRO
On 10/22/2014 01:58 PM, Kirk Wallace wrote: > On 10/22/2014 01:02 PM, Stephen Dubovsky wrote: >> Looks really nice Kirk. I have a manual lathe that I have scales for but >> haven't bought a display device yet. > > Thank you. I'm still trying to figure our how to set background colors > to make the axis information stand out a little better. One option is to > use an eventbox and set the box color, but I haven't figured out how to > access the eventbox in GladeVCP. I'm not really worried about it. I just > need something that works. > > You can get everything you need (except a break-out-board) for $150 with > something like this: > http://www.ebay.com/itm/251681642709 > > which would also work well when you upgrade from a manual DRO to CNC. > > Here is another one: http://www.ebay.com/itm/281473497942 I have a few of these running LinuxCNC here. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gvcpDRO
On 10/22/2014 11:54 AM, John Alexander Stewart wrote: > Kirk; > > Interesting - I did just sell my drill press, and am finishing up a "G0704" > mill conversion, and would like to run it with an MPG and a very simplified > screen. > > You might have the building blocks there to do this... :-) I refer to John's page a lot: http://gnipsel.com/linuxcnc/gui/index.html -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] gvcpDRO
On 10/22/2014 01:02 PM, Stephen Dubovsky wrote: > Looks really nice Kirk. I have a manual lathe that I have scales for but > haven't bought a display device yet. Thank you. I'm still trying to figure our how to set background colors to make the axis information stand out a little better. One option is to use an eventbox and set the box color, but I haven't figured out how to access the eventbox in GladeVCP. I'm not really worried about it. I just need something that works. You can get everything you need (except a break-out-board) for $150 with something like this: http://www.ebay.com/itm/251681642709 which would also work well when you upgrade from a manual DRO to CNC. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] gvcpDRO
In case anyone might be interested, I posted my latest manual mill DRO updates: http://www.wallacecompany.com/machine_shop/LinuxCNC/gvcpDRO/ http://www.wallacecompany.com/machine_shop/LinuxCNC/ The -2 version has a velocity display feature. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] part 2 - Mach3 to LinuxCNC
On 10/22/2014 08:24 AM, Charles Buckley wrote: ... snip > You want people to adopt LinuxCNC? You have to tie it to a new machine that > is cutting edge, then bill it as open source. Right now, Instructables is ... snip Hows about: http://www.tormach.com/product_lathe.html -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] How to machine....
On 10/21/2014 08:52 AM, Kirk Wallace wrote: > On 10/20/2014 02:47 PM, andy pugh wrote: >> In the end, I deicded to do it like this: >> http://youtu.be/86MN3CN7Aiw >> > > The attached is my next guess on how to machine the clutch with a > horizontal mill. The rotary axis would need to be geared with the canted > Y axis. Complex axes gearing has been done "back in the day", which is > much easier now. This set up would be how Helical couplers are slotted: > http://en.wikipedia.org/wiki/Coupling#Beam > Oops, I may take this back. I believe the side of the cutter would gouge the ramp as the rotary axis turns. I think the rotary axis needs to be tilted on two axes. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] How to machine....
On 10/20/2014 02:47 PM, andy pugh wrote: In the end, I deicded to do it like this: http://youtu.be/86MN3CN7Aiw The attached is my next guess on how to machine the clutch with a horizontal mill. The rotary axis would need to be geared with the canted Y axis. Complex axes gearing has been done "back in the day", which is much easier now. This set up would be how Helical couplers are slotted: http://en.wikipedia.org/wiki/Coupling#Beam -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Pogo Pins
I'm sorry to have caused a fuss. They way I see it now, my mistake early on was to not realize that pogo pins are meant to be used with pogo sockets. The pins are smooth so to counter the spring pressure, they need to be supported at the bottom end. My plan was to have a plate with holes drilled half way to support these pin bottoms, but this plate would not be able to make the electrical connection as is often done if the pins are set in Vero board at .1" spacing. One option I was considering was to use a through-board header connector. The pin would slide through a top plate, then through the header connector, and finally bottom out in the bottom plate. I could solder wires to the header connector pins. These problems went away when I was informed about the sockets. Socket: http://www.ectinfo.com/en/product/default.cfm?sku=117 Pin: http://www.upgradeindustries.com/media/img/products/crown_350.jpg The pin is supported by the socket. The socket is supported through its ring shank, which is fixed by a hole in a single thick plate. The wire connection is with a solder cup or wire wrap pin on the socket's bottom. I can use any pin pattern with .1" spacing or larger. (here is a higher density example: http://www.ectinfo.com/fsg/category/default_product.cfm?doc=ZOOM ) I'll post pictures when I get the bits assembled. On 10/17/2014 06:26 AM, Erik Christiansen wrote: > On 17.10.14 08:53, John Kasunich wrote: >> Did Kirk every say anything about a permanent connection? > >>From Kirk's OP: >>> I recall some connectors used to connect board to board, where header >>> pins from the bottom board pass through the bottom of the top board and >>> into a connector on top. Does anyone have a link to such connectors? > > Such stackable headers form a reliable long-term connection, and the > subject matter of my posts. > >> I'm assuming that he is using spring-loaded test probes because he is >> making a test fixture, or something similar where the connection is >> temporary. > > And so, together, we offer a greater wealth of options. > > Erik > -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Pogo Pins
On 10/15/2014 02:06 PM, John Kasunich wrote: > I just remembered that I had a detailed drawing of what I did. A > picture is worth a thousand words. See attached. ... snip Thank you Dennis and John. I didn't realize the pins are meant to be used with sockets. The sockets offer some flexibility. The example pin beds I have found on the Net have used vero(?) boards which have .1" spacing, but the spacing I need is 5mm and .15" and I don't have time to make up a custom PC board. The sockets seem to have a ring and step I can use instead of fixing with solder. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] OT: Pogo Pins
I'm planning on using these pins: http://www.ebay.com/itm/141233257616 which are .053" in dia. with 5mm and .150" pitch. I would like to connect to the pogos with a connector rather than soldering a wire. I would like the connector to be between two boards: http://wallacecompany.com/tmp/Screenshot_pogo1.png I recall some connectors used to connect board to board, where header pins from the bottom board pass through the bottom of the top board and into a connector on top. Does anyone have a link to such connectors? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] How to machine....
On 10/13/2014 09:08 AM, andy pugh wrote: On 13 October 2014 16:55, Dave Caroline wrote: I think is one was thinking of strength of the teeth it is not optimal, but old designs were often ner-enuf I could use this variant: https://picasaweb.google.com/lh/photo/v11RMmOz5B-1dOgTnla3V9MTjNZETYmyPJy0liipFm0?feat=directlink Better tooth geometry, worse ramp shape. My vote is for putting the workpiece in an A axis and using a smallish diameter end mill to side mill each quarter helix. This will leave a fillet on each ramp end, which can be cleaned up with an end mill or slitting saw. Visual aid attached. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Oscilloscope + logic analyzer (PC based)
On 10/09/2014 06:14 PM, Gene Heskett wrote: ... snip > old biker with many sets of worn out Dunlaps on my resume, I was hoping to > see the Ner-a-Car in action. > > Cheers, Gene Heskett > https://www.youtube.com/watch?v=mpHFVzwwZWs -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] some small progress
On 09/20/2014 05:12 AM, Mark Wendt wrote: ... snip >> Can't help diagnose gedit, can only say that in nigh on a quarter >> century's use of vi/vim, I've never lost (or doubled up on) a byte >> through unreliability. There is though, some extra use of undo while >> getting used to it, as with most unfamiliar software tools. >> >> I will admit to casting an eye on the status line to check the size of, >> in particular, my "on-line brain" file before saving it, just to check >> that I haven't fumble-fingered a slab of it away myself. The trouble >> with backups is that they back up your mistakes, if you never check. >> >> Erik >> > > Beat me to it. I was just about to say "vi is yer frind... " ;-) I haven't been monitoring this thread, but the above reminds me of the problems I have had with seemingly unsolicited edits in gEdit. I don't normally use a wheel mouse, but the app I'm working on requires one. I noticed editing problems showing up after starting to use a wheel mouse. The wheel has a combination of both a scroll and select text button function, which can easily cause a copy and paste without being aware of it. Recently, I found a large section of an e-mail message pasted into a Python file I'm working on. I also get strange sticky scrolling every once in a while. I'd prefer to not use a wheel mouse. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Slashdot TV. Video for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] brushless motor coil winder
On 09/19/2014 09:11 AM, Dave Caroline wrote: > I dont think it is much worse than any other, you just join the groups > of coils together differently. > > Often the coils are wound off the rotor/stator and then mounted and > varnished to keep steady. > > Reverse engineer (unwind) one to see how they did it. > > > Dave Caroline > > On 19/09/2014, David Armstrong wrote: >> Guys, >> iv'e been asked to come up with a coil winder for rc brushless motors >> has anyone done such a winder , specific to rc brushless ,as these are 3 >> phases >> i fear it could get complicated >> >> Dave The RC motors I'm familiar with use a few turns of very thick wire and would be a bear to wind mechanically. There may be a way to wind a coil off the core then install it to the stator leg, but this not ideal. Maybe form C shapes and weld them into a coil after they are installed? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Slashdot TV. Video for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hey Gene! Still looking for a pocket O'scope?
On 09/17/2014 11:22 AM, John Kasunich wrote: > Kirk Wallace wrote: > >> An oscilloscope app for Google Glass might save on squinting, and one >> wouldn't have something valuable such as a wrist wired to the probes. > > Not my valuable wrist, just my worthless head :-) Oops, I meant an editorial one's, not any one in particular. Rigging anyone's head with high voltage provided an entertaining, or rather interesting, image. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hey Gene! Still looking for a pocket O'scope?
On 09/17/2014 10:03 AM, John Kasunich wrote: > > > On Wed, Sep 17, 2014, at 11:05 AM, Dave Cole wrote: >> And I thought that the Apple and Samsung cell phone connected watches >> were a bad idea! >> >> I can see the instructions now: Strap the device to yourself and attach >> it to the live circuits!!! >> What a horrible idea! >> >> Dave > > Kids these days do everything with 3.3 volts. > > What I would find more of a problem is the tiny screen. A phone > screen is about four times that size and still far too small. I hate > having to squint at stuff. > An oscilloscope app for Google Glass might save on squinting, and one wouldn't have something valuable such as a wrist wired to the probes. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tsudokoma 4th Axis Rotary Table
On 09/17/2014 04:20 AM, Rick wrote: > Hello Kirk, > > I saw the bits and pieces of this catalog on their website, not the > whole thing, so I didn't see that page regarding the servos, now I know > what size should be in the unit though, The catalog seems to indicate that Fanuc motors were most commonly used. Jon with Pico Systems and Peter with Mesa (?) have worked on Fanuc interfaces: http://pico-systems.com/fanuc_pins.html http://pico-systems.com/fanser_pins.html http://www.linuxcnc.org/index.php/italian/forum/30-cnc-machines/20837-fanuc-servo-drive-integration?limit=6&start=24 https://www.youtube.com/watch?v=l-MNy6-QanI If you post the information on the motor's data plate, you might get a reply on whether there is something available to drive it. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tsudokoma 4th Axis Rotary Table
On 09/16/2014 08:42 AM, Rick wrote: ... snip > The unit is Model# RNCM-300 > And the Serial# is 40502 > > We were looking to see what the servo motor was inside of it, so we can > find a drive hopefully, and get it integrated into one of our machining > centers. ... snip Page 98 here might help: http://www.komaprecision.com/2013%20Literature/Rotary%20Tables/Tsudakoma%20Rotary%20Tables%2013,0%20LoRez%20Save.pdf Posting pictures of the insides of the unit might help too. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce. Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Fwd: Modbus description language and compiler
I forwarded this in case someone might be interested. Original Message Subject: Modbus description language and compiler Date: Fri, 12 Sep 2014 16:01:30 -0400 From: James Nutaro Reply-To: libmod...@googlegroups.com To: libmod...@googlegroups.com CC: sany...@ornl.gov Hi all, Below is a link to a public github repository that has the source code, documentation, examples, etc. for a Modbus device description language and a compiler for that language. The compiler translates a description language into a C++ object that, via libmodbus, can be used to talk to a device. I thought this might be of interest to the libmodbus user community. If you have an opportunity to try it out, I'd be interested in your feedback. My apologies if this post is a duplicate. My prior email to the list bounced. https://github.com/ORNL-BTRIC/ModbusXMLSchema -- Vous recevez ce message, car vous êtes abonné au groupe Google Groupes libmodbus. Pour vous désabonner de ce groupe et ne plus recevoir d'e-mails le concernant, envoyez un e-mail à l'adresse libmodbus+unsubscr...@googlegroups.com. Pour plus d'options, visitez le site https://groups.google.com/d/optout . -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] 3D in Space
http://www.nasa.gov/mission_pages/station/research/news/3D_in_space/#.VAdqQfldU1I -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] OT: Mill Vise Advise
I have a couple of 6" mill vises that came with used mills. They are pretty well worn, but not as bad as this one: http://www.ebay.com/itm/181467659964 It seems to me they could be disassembled and surface re-ground and be as good as new. Has anyone tried this? I suspect it would take a largesh grinder, so I may need to send the grinding out a fair distance. My guess is shipping would cost too much. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] OT: Anyone Have Code to Print This?
http://www.nasa.gov/sites/default/files/14-179_rs_25_installation_0.jpg http://www.nasa.gov/press/2014/july/nasa-begins-engine-test-project-for-space-launch-system-rocket/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Spindle encoder on 7i76
One more: http://members.shaw.ca/SWSTUFF/spindle-encoder.html http://members.shaw.ca/SWSTUFF/index.htm On 07/15/2014 07:19 AM, Kirk Wallace wrote: > On 07/15/2014 06:44 AM, Marius Liebenberg wrote: >> >> On 2014-07-15 14:00, andy pugh wrote: >>> On 15 July 2014 10:44, Marius Liebenberg wrote: >>>> What would the highest safe RPM be for a 2048 quadrature spindle encoder >>>> on the 7i76. >>>> I have to use some pulleys to mount the encoder on my spindle and I >>>> would like to use what I have on the shelf if possible. >>> 1:1 is the right ratio, if you want to use the index from the encoder. >>> The encoder on the 7i76 can do 10Mhz according to the manual, so that >>> should be OK to 292,000 rpm. >> OK so speed is not the problem. I will have to concoct another method to >> mount the encoder if it is better to have it 1:1 >> How do others do that on a lathe seeing that you cannot mount the >> encoder on the back of the shaft. The shaft is hollow for material to >> pass through. >> > > http://www.wallacecompany.com/cnc_lathe/HNC/00010-1a.jpg > http://www.wallacecompany.com/cnc_lathe/HNC/00011-1a.jpg > http://www.wallacecompany.com/cnc_lathe/HNC/ > -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Spindle encoder on 7i76
On 07/15/2014 06:44 AM, Marius Liebenberg wrote: > > On 2014-07-15 14:00, andy pugh wrote: >> On 15 July 2014 10:44, Marius Liebenberg wrote: >>> What would the highest safe RPM be for a 2048 quadrature spindle encoder >>> on the 7i76. >>> I have to use some pulleys to mount the encoder on my spindle and I >>> would like to use what I have on the shelf if possible. >> 1:1 is the right ratio, if you want to use the index from the encoder. >> The encoder on the 7i76 can do 10Mhz according to the manual, so that >> should be OK to 292,000 rpm. > OK so speed is not the problem. I will have to concoct another method to > mount the encoder if it is better to have it 1:1 > How do others do that on a lathe seeing that you cannot mount the > encoder on the back of the shaft. The shaft is hollow for material to > pass through. > http://www.wallacecompany.com/cnc_lathe/HNC/00010-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/00011-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] .pit file extension
On 06/12/2014 10:06 AM, Rick Lair wrote: > Hello Guys, > I have been trying to break into a file on one of my other machines control, > and I am not succeeding. The file has a .pit file extension, > > Any suggestions on what I should use to open it?? > Thanks > Rick You might try gHex: http://directory.fsf.org/wiki/Ghex gHex should be in your software Synaptic package manager. This might give you an idea on what is inside the file. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Serial hal
On 06/10/2014 06:52 PM, Trần Ngọc Quân wrote: > Hello all, > My previous question [1] is not clear. > > My idea is create hal drive (hal_serial) for pc com port: > PC <=COM=> Microcontrol board (MC51 for example) > > Protocol: > - PC read 8bits from Microcontrol boad, for read status of limit switch, > emergency stop button etc. > - PC write 8bits to Microcontrol boad, for on/off some things ( spindle, > pump etc.) > - Read/Write task will continue in forever loop. > > Step control by lpt or other. > > [1] http://sourceforge.net/p/emc/mailman/message/32442282/ > The ModIO product does this: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ModIO Or this AVR example (bottom of page): http://wiki.linuxcnc.org/cgi-bin/wiki.pl?AVR http://wiki.linuxcnc.org/cgi-bin/wiki.pl?VFD_Modbus http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ARM http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Emc2HardwareDesign Also note that the E-stop button circuit should be a simple wire loop that basically controls a power relay. If the loop is interrupted the power is cut. Smart bits like LinuxCNC and any controllers should have inputs that monitor the loop in order to act appropriately during an E-stop. The smart bits should not be relied upon to initiate an E-stop if an unsafe condition occurs. A watchdog signal may be used to monitor these smart bits and initiate an E-stop if any smart bits become dumb. There may be other important E-stop issues I have not covered here. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Serial port
On 06/09/2014 10:05 PM, Gregg Eshelman wrote: > On 6/9/2014 7:10 PM, Kirk Wallace wrote: >> On 06/09/2014 05:48 PM, Trần Ngọc Quân wrote: >>> Hello, >>> Serial is slow, but it fast enough for on/off spindle, water pump; read >>> from emergent stop button, limit switch etc. >>> So can linuxcnc combinate lpt (and other ones) with com port? >>> >> >> I would suggest using Modbus. Serial R232 to RS484/422 adapters are >> common. LinuxCNC supports Modbus in ClassicLadder or with Python and >> LibModbus. Modbus is designed for machine control and is common on VFDs >> and with microcontrollers. Search the LinuxCNC wiki for Modbus for more >> information. > > So it can use an RS232 connection to a VFD to control on/off fwd/rev, > while everything else is running through a different control board? It's not clear to me what the original post was asking. Generally, if I were to use the PC's serial port for I/O control, I would use Modbus. It is designed for industrial control. It has decent speed over long distances in noisy environments. This can not be said for USB, I2C, or the other popular PC based serial systems. Most VFD and PLC units have Modbus features. Also an Arduino or other micro-controller can be used for all sorts of analog, digital and PWM I/O. For a VFD, the advantage of Modbus over simple digital I/O is in being able to do more than the control of speed and direction. One can also monitor; voltage, load, frequency and other status features. Features can also be set or modified if needed. There was a hint of using the parallel port with serial, or using the parallel port for serial communications. Both of these are possible. LinuxCNC has no problem mixing signals from different ports for the same application. Such as using parallel port pins and an FPGA signal generator for a tool changer. For serial data from a parallel port -- early in my study of Modbus I used a few parallel port pins to bit bang the serial data to my VFD. It worked fairly well but is not the best way to go. There is also documentation in the Wiki describing how to use serial port pins such as RTS, DTS, and such for digital I/O. The advantage here is that these pins run at +/- 12 volts for better noise immunity if needed. The above assumes one has the skill to write software in order to customize what LinuxCNC has to offer. Otherwise, one would need to study the existing configurations to see if one of them matches one's requirements. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Serial port
On 06/09/2014 05:48 PM, Trần Ngọc Quân wrote: > Hello, > Serial is slow, but it fast enough for on/off spindle, water pump; read > from emergent stop button, limit switch etc. > So can linuxcnc combinate lpt (and other ones) with com port? > I would suggest using Modbus. Serial R232 to RS484/422 adapters are common. LinuxCNC supports Modbus in ClassicLadder or with Python and LibModbus. Modbus is designed for machine control and is common on VFDs and with microcontrollers. Search the LinuxCNC wiki for Modbus for more information. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Shaper
Just in case someone on the right coast needs a shaper: http://www.ebay.com/itm/321419575694 -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Bandsaw Blades
On 06/02/2014 03:49 AM, John Thornton wrote: > Let us know what you think about it... might save me from trying it. I got the Starrett blade. While putting it on the saw, I noticed the power cord was in really bad shape, so I pulled the saw out to get to the wiring inside and found four unused blades in the coolant tank. My dad had not used coolant, so I guess used the tank for storage. With a new power cord installed, I installed the new blade and made a couple of cuts on 1" x 3" 6061 aluminum. Everything worked fine without any drama. I don't do a lot of cutting, so it will be a while before the blade will get any serious testing. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: Bandsaw Blades
On 06/01/2014 11:39 AM, John Alexander Stewart wrote: > Hate to say this, but I had 3 Starrett blades that would NOT stay on my > cutoff bandsaw. Real frustrating having a bandsaw that took longer to keep > putting blades back on than it did to cut material. Oops, I guess I'll find out if the blade is any good soon enough. I only ordered one in a medium pitch. I'm hoping it doesn't take too many blades to find one I like. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ -- Time is money. Stop wasting it! Get your web API in 5 minutes. www.restlet.com/download http://p.sf.net/sfu/restlet ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
