[Emc-users] ot: voltage and steppers
I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity Richard -- 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] ot: voltage and steppers
Just a WAG..but There is no heat sinking on that component at all in the picture. Stepper drivers throw off some heat.. less at lower voltages. Is the component reducing current to protect itself due to an overtemp situation? Dave On 3/28/2015 2:37 PM, kqt4a...@gmail.com wrote: I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity Richard -- 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 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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] Re-purpose or move along?
I am looking for either some cool ideas or someone who would like to take a project of my (too full) hands. I just sold off my manual sinker EDM and acquired a CNC sinker. Along with the deal came an identical parts machine. The folks told me that it was functional when they took it out of service, but over the years they have swapped out boards and other parts with the twin that they were still using. It is a mid-to-late 90's Charmilles Roboform 20. It does not have C axis or an electrode changer. A picture of this machine can be had by googling images for the model. I think my first choice would be to deal the machine to someone who would want to repurpose it and allow me to keep spares. I would like to keep boards, monitor, keyboard and touchpads, probably even the axis motors. I can probably do without the ballscrews, so if someone were looking for an XYZ platform it seems like it would be an opportunity. For this scenario I would let it go for very little, as it is currently residing under a tarp and partial overhang, blocking one garage door. (Assembled it is too tall to get inside.) It could be brought back to life as its original EDM, but I can't guarantee all of the parts are fully functional or even there. I imagine some of the boards were swapped and the faulty ones not fixed. It would likely get expensive. For those of you who may not know about EDMs, their travel resolutions are quite accurate, but they will not be built as heavily as a milling machine because they typically move slow and do not encounter cutting loads or resistance. With my overwhelmingly positive experience with my Linux CNC 4-axis creep-feed grinder, I am tempted to repurpose this myself. I would probably do this if I could visualize myself completing it into a laser engraver. Other ideas include perhaps a CMM or Laser Scanner. It would probably make a great 3D printer, or light milling/ engraving machine. I am hurting for space and I am not sure my enthusiasm or need for any of these is sufficient. Do any of you have any ideas to fire up my enthusiasm, or any interest in acquiring the machine? I live in Oregon. The unit is on a pallet and weighs around 2000 lb. I move things like this by renting a drop-bed trailer and rolling it on and off with a pallet jack. -- Andy Evans Evans Precision Tooling Incorporated 541.990.2122 -- 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] Custom EMC installation?
Hi all, I've been out of touch with linux for a decade now, so wondering if it would be relatively easy (ie: fairy well documented and fairly bug free) to install EMC on my own distro. Perhaps on Ubuntu 14.04. Essentially I want to get 2 things installed on the same OS... EMC and openPnP. If you want to gory details, read on: Installing openPnP was simple, and includes the required openCV, but that version (apparently 2.4.9) requires GLIBC 2.15. The Debian distribution of EMC I have has EGLIBC 2.13 Apparently if I try to install a later version of GLIBC/EGLIBC, I'll break several other things. OpenPnP is supposed to check and use my openCV first, so I (painfully) managed to install openCV over the course of a week or so, fixing various odd bugs/issues with openCV, cmake, and java. But openPnP does not seem to recognize it. I tried openCV 2.4.10 and 2.4.9. So my alternate plan is to install EMC2 on ubuntu 14.04 (which I lean towards only because I already have it installed on a different partition and which runs openPnP fine). But EMC2 requires real-time kernel extensions, which I'm worried would be painful to install (haunting memories of kermel compiles from years ago ;). Again, I point out that I'm not fluent with linux anymore. What path do you think I should go with this? Thanks. -- 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] ot: voltage and steppers
On 03/28/2015 08:37 PM, kqt4a...@gmail.com wrote: I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity The chip uses a constant current setup using PWM. When you raise the supply voltage then the trip-current is reached sooner and recovery may take too long for the next PWM cycle. The datasheet says that the off-time is between 7 and 12 microseconds. Your high voltage level may cause a feed-through on the current-limiter because of the increased rising flank of the current. This decreases the on-time vs off-time and the effective current to the motor is reduced which results in a lower torque. The problem may be in the physical setup, where too much noise is propagated. You should check the wiring and use an oscilloscope to check the signals for spikes etc.. -- Greetings Bertho (disclaimers are disclaimed) -- 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] Cleaning machinery
On 29 March 2015 at 00:42, richsh...@comcast.net wrote: Any suggestions on a degrease process? I normally use what we call White Spirit but it sounds like you tried that. http://en.wikipedia.org/wiki/White_spirit -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- 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] Cleaning machinery
I just bought a 1975 vintage Anayak FV2 mill, imported to the US by DoAll. It has so much grease, muck, and yuck on it, I need to clean it. So far I've tried citrus based solvent, paint thinner, automotive, parts cleaner.. Applying it via green and brown scotch brite pads. Any suggestions on a degrease process? - Original Message - From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Saturday, March 28, 2015 2:44:22 PM Subject: Emc-users Digest, Vol 107, Issue 78 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: Possible New Lathe (richsh...@comcast.net) 2. ot: voltage and steppers (kqt4a...@gmail.com) 3. Re: ot: voltage and steppers (Dave Cole) 4. Re: ot: voltage and steppers (kqt4a...@gmail.com) 5. 2.6.4 to 2.6.7 update without a network connection? (Gregg Eshelman) -- Message: 1 Date: Sat, 28 Mar 2015 15:24:42 + (UTC) From: richsh...@comcast.net Subject: Re: [Emc-users] Possible New Lathe To: emc-users@lists.sourceforge.net Message-ID: 1991675046.16595850.1427556282912.javamail.zim...@comcast.net Content-Type: text/plain; charset=utf-8 Boris? Obviously, an oversize Van Norman vertical mill, I'd say 7,000 lbs or so. - Original Message - From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Friday, March 27, 2015 11:45:16 PM Subject: Emc-users Digest, Vol 107, Issue 76 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: Converting straight lines to arcs? (andy pugh) 2. Re: Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy? (Gregg Eshelman) 3. Re: Possible New Lathe (Gregg Eshelman) 4. Anyone have leftovers from a 9x20 CNC conversion? (Gregg Eshelman) 5. Re: Possible New Lathe (Gregg Eshelman) 6. Re: Velocity closed loop + Position losed loop on an axis (Jon Elson) 7. Re: Velocity closed loop + Position losed loop on an axis (Karlsson Wang) -- Message: 1 Date: Sat, 28 Mar 2015 00:36:39 + From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Converting straight lines to arcs? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: CAN1+YZVdhS=mnazvq02zh_qyjpfjslncriremqhknmhhrdx...@mail.gmail.com Content-Type: text/plain; charset=UTF-8 On 28 March 2015 at 00:13, Gregg Eshelman g_ala...@yahoo.com wrote: Will it allow saving/exporting the modified G-code file? It looks like that is _all_ it allows. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Message: 2 Date: Fri, 27 Mar 2015 19:57:55 -0600 From: Gregg Eshelman g_ala...@yahoo.com Subject: Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 55160aa3.30...@yahoo.com Content-Type: text/plain; charset=utf-8; format=flowed On 3/27/2015 6:41 AM, Igor Chudov wrote: Andy, this BP has a 30 taper spindle. It is actually quite big. I put a servo motor (really a DC motor with encoder that I added) on the knee, so the knee goes up and down easily, it is called W axis and it is very handy. The vertical envelope of this milling machine is quite big. This machine itself, a knee mill, is much bigger than the usual bridgeport, it weighs at 5,000 lbs or something like that. Called Series II Interact 2. Ah. The Super Beetle of the Bridgeport line. Better in so many ways that the previous model, then for some reason they quit making it and went back to the original design, though somewhat adjusted/tweaked. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- Message: 3 Date: Fri, 27 Mar 2015 21:10:23 -0600 From: Gregg Eshelman g_ala...@yahoo.com Subject: Re: [Emc-users] Possible New Lathe To: Enhanced Machine
Re: [Emc-users] ot: voltage and steppers
On Saturday 28 March 2015 19:36:09 kqt4a...@gmail.com wrote: On Sat, 28 Mar 2015, Bertho Stultiens wrote: On 03/28/2015 08:37 PM, kqt4a...@gmail.com wrote: I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity The chip uses a constant current setup using PWM. When you raise the supply voltage then the trip-current is reached sooner and recovery may take too long for the next PWM cycle. The datasheet says that the off-time is between 7 and 12 microseconds. Your high voltage level may cause a feed-through on the current-limiter because of the increased rising flank of the current. This decreases the on-time vs off-time and the effective current to the motor is reduced which results in a lower torque. The problem may be in the physical setup, where too much noise is propagated. You should check the wiring and use an oscilloscope to check the signals for spikes etc.. I do not have an oscilloscope You may have to cultivate a friend who does have one. As a scope user myself since 1951, there is no other way to measure things where time vs voltage or amperage needs to be measured. and I don't think noise is the problem I am single and it is usually pretty quiet around here :) The noise being refered to is electrical, not acoustical and steppers, with their built in PWM modulation in a decent driver that does regulate current to maintain the average, is one noisy puppy electrically, which is the sort of noise being referred to. One more question though. After half an hour powered up on 12 volts, how does the motors temp (its gonna be hot, use an IR thermometer) compare with 1/2 hour powered up on 36 volts? If its smell it hot in 10 minutes, pull the plug, your drivers are not regulating the current adequately and the motor is saturated, possibly damaging the rotors magnetism forever If its many degrees cooler, then the driver may be turning itself down to protect the driver. If its smart enough, most of the lower cost drivers aren't. I have let the magic smoke out and broke the mirrors on quite a few allegro A-3977 based drivers. I switched to 2M542's off fleabay about 5 or 6 years back, buying enough to switch them all out with one spare for the parts drawer. Its still there, has not been needed. Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene -- 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] Cleaning machinery
Scrape off all you can of the heavy stuff. http://www.ehow.com/way_5434198_homemade-engine-degreaser.html The kerosene mix works very well on heavy grease. Spray it on, let it sit, brush and wipe it off, repeat. Dawn dishwashing soap works well with kerosense. Buy big bottles of it from Sam's/Costco etc. It works best when things are warm of course. Aim a space heater at the machine for a while and get it up to 80-90 degrees then spray it on and things will go much faster. I've used that solution for years to clean up dirty engines.A cheap pump up tank sprayer such as used for weeds etc works fine. Dave On 3/28/2015 7:42 PM, richsh...@comcast.net wrote: I just bought a 1975 vintage Anayak FV2 mill, imported to the US by DoAll. It has so much grease, muck, and yuck on it, I need to clean it. So far I've tried citrus based solvent, paint thinner, automotive, parts cleaner.. Applying it via green and brown scotch brite pads. Any suggestions on a degrease process? - Original Message - From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Saturday, March 28, 2015 2:44:22 PM Subject: Emc-users Digest, Vol 107, Issue 78 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: Possible New Lathe (richsh...@comcast.net) 2. ot: voltage and steppers (kqt4a...@gmail.com) 3. Re: ot: voltage and steppers (Dave Cole) 4. Re: ot: voltage and steppers (kqt4a...@gmail.com) 5. 2.6.4 to 2.6.7 update without a network connection? (Gregg Eshelman) -- Message: 1 Date: Sat, 28 Mar 2015 15:24:42 + (UTC) From: richsh...@comcast.net Subject: Re: [Emc-users] Possible New Lathe To: emc-users@lists.sourceforge.net Message-ID: 1991675046.16595850.1427556282912.javamail.zim...@comcast.net Content-Type: text/plain; charset=utf-8 Boris? Obviously, an oversize Van Norman vertical mill, I'd say 7,000 lbs or so. - Original Message - From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Friday, March 27, 2015 11:45:16 PM Subject: Emc-users Digest, Vol 107, Issue 76 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: Converting straight lines to arcs? (andy pugh) 2. Re: Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy? (Gregg Eshelman) 3. Re: Possible New Lathe (Gregg Eshelman) 4. Anyone have leftovers from a 9x20 CNC conversion? (Gregg Eshelman) 5. Re: Possible New Lathe (Gregg Eshelman) 6. Re: Velocity closed loop + Position losed loop on an axis (Jon Elson) 7. Re: Velocity closed loop + Position losed loop on an axis (Karlsson Wang) -- Message: 1 Date: Sat, 28 Mar 2015 00:36:39 + From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Converting straight lines to arcs? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: CAN1+YZVdhS=mnazvq02zh_qyjpfjslncriremqhknmhhrdx...@mail.gmail.com Content-Type: text/plain; charset=UTF-8 On 28 March 2015 at 00:13, Gregg Eshelman g_ala...@yahoo.com wrote: Will it allow saving/exporting the modified G-code file? It looks like that is _all_ it allows. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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] Smart little device for zeroing
Thanks again for the words of encouragement the other day, guys. I've been thinking, which has always been dangerous for me. I need to bounce my thoughts off of some smart people, to set me straight. First let be beg forgiveness if this is inappropriate, or if I pull this thread off topic... It seemed dead anyway. As I mentioned, I have not received the machine yet, so all of this is theory at this point. The router is a Probotix Nebula, and will come ready to make chips out of the crate, but I have a lot to learn in preparation and trying to figure it out on my own is starting to hurt. I am having a tool length switch installed and it will come configured with a tool changing routine. The routine is called by a o100 command. I am also having a 4th axis rotary installed. This is where I am confusing myself. I haven't purchased the cam yet, but do believe it will be vectric aspire. This means the the rotary work will have to be wrapped around I believe the x axis, in this case, at the post processor. I also want to use the makers guide featured in the attached video, foe most of my work, and will need to pull off all the custom buttons and code to make that happen. Am I correct in thinking that all the coding I'll need to do will be in absolute co-ordinates, and not affected by the gcode that is wrapped around the x axis. Like if I set the rotary to be say a G55 work co-ordinate, and run a wrapped gcode file that has tool changes in it, when a tool change routine is called the machine will go to the tool change position, wait for me, do the routine and go back to G55 and start running the wrapped code again? Or, is it going to sit there after the new tool length offset and spin the A axis instead of travelling back the the work offset origin? Here is a link to the code Probotix uses: http://www.probotix.com/wiki/index.php/Automatic_Tool_Length_Sensor I apologize for all the background, but don't know enough to know how much info you might need, or if you get these newbie questions all the time. I do appreciate any time taken to help, Scott On Fri, Mar 27, 2015 at 4:55 PM, Gene Heskett ghesk...@wdtv.com wrote: On Friday 27 March 2015 17:42:14 andy pugh wrote: On 27 March 2015 at 21:35, Scott Salrin scott.sal...@gmail.com wrote: I just need to find a way to make it work in linuxcnc. It isn't magic. And you won't need any C. Yeah, if I can write the code to do that so can he. I do it in pieces, like I think theres a holefinder.ngc on my web page that can be edited to work with that jig. Probably a poor tutorial, but it works well enough for drilling pcb holes halfway thru the board, turning the board over and drilling it half way from the other side with the holes meeting in the middle w/o a visible offset. Applied offsets are TBD by the user though. Here its repeatable to under a thou variation. Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene -- 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 -- 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] Not ACME, ballscrews! Re: Anyone have leftovers from a 9x20 CNC conversion?
On 3/28/2015 8:46 AM, Gene Heskett wrote: I need to be finding some good ACME rod for the 9x20 CNC, motors etc. Scratch the ACME. Today I snagged a homebuilt XY table to cannibalize for parts. http://boise.craigslist.org/art/4894831991.html Across the gantry it has a 0.37-ish rolled ballscrew with a nut threaded on one end, with a max OD of .247 I have the saddle channel plowed out to nearly that, can easily go the extra few thou to have it just clearing. Will run a big ballnose down the center if it needs to be lower down. Of course that screw will need shortened a bunch. I plan to give it as much cross slide travel as I can. The other axis is a vintage Star ballscrew linear actuator made in 1997, inside a 2x2 aluminum extrusion with a block on one side. I'll mount that to the side of the bed with the block down (keep the chips out of the open side) and make a dead simple bracket to mount from the side of the block to the original apron mounting holes on the saddle. And it has motors, bleeping expensive Superior Electric Slo-Syn 200 step steppers. A NEMA 34 connected to the Star actuator direct drive with a Lovejoy and a NEMA 23 with a belt drive to the other axis. The builder for some reason put the large pulley on the motor. The table is HEAVY, made of nicely put together wood. It shall become the new seat upon which my PLM2000 mill will set, after removal of everything screwed down to its top. It looks deceptively weedy in the photos but it's around 4 feet tall. Took three people to get it into the truck and we had to tilt it up on one edge then down onto the tailgate to lift and slide it in. Cost? $300 cash money. :) Some of the other parts may migrate their way into a 3D printer I'm wanting to build. Need to do something with the 30 feet of 40x40mm aluminum t-slot extrusion and various corner plates and angle brackets I've been given. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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] ot: voltage and steppers
On Sat, 28 Mar 2015, Dave Cole wrote: Just a WAG..but There is no heat sinking on that component at all in the picture. Stepper drivers throw off some heat.. less at lower voltages. Is the component reducing current to protect itself due to an overtemp situation? I have large heat sink attached and a fan -- 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] 2.6.4 to 2.6.7 update without a network connection?
Where do I download the update from 2.6.4 to 2.6.7 to sneakernet to a PC with the Debian Wheezy LCNC install? I'm setting up a computer with a pair of hard drives, one for Linux and one for XP. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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] 2.6.4 to 2.6.7 update without a network connection?
On 28 March 2015 at 21:44, Gregg Eshelman g_ala...@yahoo.com wrote: Where do I download the update from 2.6.4 to 2.6.7 to sneakernet to a PC with the Debian Wheezy LCNC install? http://buildbot.linuxcnc.org/dists/wheezy/2.6-rt/binary-i386/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- 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] ot: voltage and steppers
On Sat, 28 Mar 2015, Bertho Stultiens wrote: On 03/28/2015 08:37 PM, kqt4a...@gmail.com wrote: I have a question about the voltage to drive a stepper motor 12 volts works but higher voltages make the motor weaker I am building a simple stepper driver A nema 23 2.7 amp stepper motor and 36 volt power supply The controls are hand held, forward ,reverse, stop, and speed I built the controls and driver using a 12 volt battery to test Now I completed the project and am using the 36 volt supply The motor runs at the same speed but it is so weak I can hold the shaft and stall the motor This is also the same with 36 and 24 volt batteries With a 12 volt battery I can not stall the motor I am using http://piclist.com/techref/io/stepper/SLAm/SLAm_bld.htm and an Arduino I would be happy if someone would point out my stupidity The chip uses a constant current setup using PWM. When you raise the supply voltage then the trip-current is reached sooner and recovery may take too long for the next PWM cycle. The datasheet says that the off-time is between 7 and 12 microseconds. Your high voltage level may cause a feed-through on the current-limiter because of the increased rising flank of the current. This decreases the on-time vs off-time and the effective current to the motor is reduced which results in a lower torque. The problem may be in the physical setup, where too much noise is propagated. You should check the wiring and use an oscilloscope to check the signals for spikes etc.. I do not have an oscilloscope and I don't think noise is the problem I am single and it is usually pretty quiet around here :) -- 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] Custom EMC installation?
On Sat, 28 Mar 2015, Neil wrote: Date: Sat, 28 Mar 2015 18:01:31 -0400 From: Neil emc_d...@narwani.org To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] Custom EMC installation? Hi all, I've been out of touch with linux for a decade now, so wondering if it would be relatively easy (ie: fairy well documented and fairly bug free) to install EMC on my own distro. Perhaps on Ubuntu 14.04. Essentially I want to get 2 things installed on the same OS... EMC and openPnP. If you want to gory details, read on: Installing openPnP was simple, and includes the required openCV, but that version (apparently 2.4.9) requires GLIBC 2.15. The Debian distribution of EMC I have has EGLIBC 2.13 Apparently if I try to install a later version of GLIBC/EGLIBC, I'll break several other things. OpenPnP is supposed to check and use my openCV first, so I (painfully) managed to install openCV over the course of a week or so, fixing various odd bugs/issues with openCV, cmake, and java. But openPnP does not seem to recognize it. I tried openCV 2.4.10 and 2.4.9. So my alternate plan is to install EMC2 on ubuntu 14.04 (which I lean towards only because I already have it installed on a different partition and which runs openPnP fine). But EMC2 requires real-time kernel extensions, which I'm worried would be painful to install (haunting memories of kermel compiles from years ago ;). Again, I point out that I'm not fluent with linux anymore. What path do you think I should go with this? Thanks. I have linuxcnc running on ubuntu 14.04 using a preemt-rt kernel this may or may not have good enough latency for a software stepgen system depending on your PC hardware and performance requirements https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO has instructions for building a preemt-rt kernel (and heres a script) cd ~ mkdir rtlinux cd rtlinux wget ftp://ftp.kernel.org/pub/linux/kernel/v3.x/linux-3.18.9.tar.xz wget https://www.kernel.org/pub/linux/kernel/projects/rt/3.18/patch-3.18.9-rt5.patch.gz tar -xpf linux-3.18.9.tar.xz gunzip patch-3.18.9-rt5.patch.gz cp patch-3.18.9-rt5.patch linux-3.18.9 cd linux-3.18.9 cat patch-3.18.9-rt5.patch | patch -p1 make xconfig make sudo make modules_install sudo make install I have a working .config here if you dont want to mess with all the kernel options settable with xconfig freeby.mesanet.com/rtconfig (move to linux source directory and rename to .config) Note that this enables about every hardware driver you can imagine so takes a while to compile and something close to this will build the uspace version of linuxcnc (for the preemt-rt real time kernel) from source cd ~ sudo apt-get install git-core gitk git-gui sudo apt-get build-dep linuxcnc sudo apt-get install libudev-dev git clone git://git.linuxcnc.org/git/linuxcnc.git linuxcnc-dev cd linuxcnc-dev git checkout 2.7 git pull cd src ./autogen.sh ./configure --with-realtime=uspace make sudo make setuid cd .. . scripts/rip-environment -- 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 Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- 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] Anyone have leftovers from a 9x20 CNC conversion?
On 28 March 2015 at 03:28, Gregg Eshelman g_ala...@yahoo.com wrote: I'll have the gearbox off my $50 9x20 but need another. I must have one somewhere, but I don't know where it is. Probably in my dad's rust-barn. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- 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] Anyone have leftovers from a 9x20 CNC conversion?
On Saturday 28 March 2015 06:27:33 Gregg Eshelman wrote: On 3/28/2015 3:05 AM, Gene Heskett wrote: On Friday 27 March 2015 23:28:12 Gregg Eshelman wrote: I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box with 9 speeds... I wonder if any combinations would be duplicates? I believe that any combo would be the same as mirroring the combo, eg 3rd gear on box 1 and 5th gear on box 2, would be identical to 5th gear on box 1 and 3rd gear on box2. So while 1st gear in both boxes would be a set stakes and call a surveyer slow, there would not be the 81 variations with no dups. To me, with the capability in LCNC to lock axis motions together, it made more sense to put a bigger HP treadmill motor on mine, with a fixed 3/1 reduction before it got to the backgear. With a fwd only toroid mod to one of Jons servo amps, and an old 1500 WA phase linear audio amp power transformer for a motor psu, it could turn the spindle in a much bigger lathe than my toy 7x. I can still get to 1500 rpms, not fast enough for real CSS at small diameters, but usable for above 0.75 OD stuff. I'm thinking of a much less expensive way to put a gearbox on an old Montgomery Ward manual lathe. One box of 9 ratios isn't as good as the 5 and 8 position dual lever (and hard to find+expensive) Logan original. A New-All or one of the other 1 or 2 old brands of aftermarket boxes are even harder to find. I need to be finding some good ACME rod for the 9x20 CNC, motors etc. I found that the Chinese rolled ballnut screws in 16mmx5mm thread size for the z drive were: A) already equipt with snug felt debris wipers so I didn't have to enclose them for the amount of use I'd give them. B) Not that much more than some Nook 1/2x10 screw and a pair of their Bronze nuts so the backlash could be adjusted down to a thou or so. It would have been north of $130 since the nuts were $50 ea. So in comparison, Nook priced themselves out of my consideration. In comparison to x drive with its very limited nut space under the crossfeed, one of our list members rescued me with some 8mm salvaged takouts whose nuts had no seals and no flange so they were nominally 9/16 in diameter and about 5/8 long. I made a container cage that effectively made them about 5/8 square 7/8 long, used the mill to make room for that in the H saddle. Unfortunatly I have destroyed the cover to keep the swarf out by moving into -0.00 territory on several occasions, so now I can hear a dirty ball clicking once per rev but the motion seems fine yet. That screw in the lathes x has the original balls in the nut and if I get froggy this summer I'll take it apart, clean it up put oversized balls in that one also. I bought 500 on fleabay for a tenner. I might even redesign the cage for the felt wipers while I am at it. My motor is on the back, and in that direction the carrier could grow enough to make room for the felt wipers maybe even a bit of wead eater gas line to get some oil into it occasionally like I did on the mill. And maybe rig a limit switch to keep from destroying the dust cover over the rear of the cross-slide to motor mount. I have not been able to find Chinese screws nuts that size on the web, they generally are 10mm diameter minimum and all have nuts with huge flanges there isn't room for in this smaller stuff unless you can figure out how to grow an extra 1/2 between the table/base and table/table. So I may have the last of those in captivity. Steve Stallings sold them to me at a give them away to get them out of his way price when I was looking for screws for my mill, which is also way too crowded to even consider the use of a flanged nut in either table drive. I had to make nut containers for those too, but made these so they are packed with felt wipers cut from an old western hat I'd gotten terminally greasy from 20 years use as a hat. Seems to have worked fairly well. I made the nut pockets cap by making a disk with spanner drive holes, and threading the disk and the nut carrier at 50 tpi so I could take it up as the felt was crushed by the pressure. But to tighten/adjust, I still have to take the tables off apart. I also put a thou bigger balls in the nuts, so its just under a thou for backlash when freshly snugged up. Precise enough now that I can detect thermal growth as it warms up since the z drive is relatively long, I didn't intend to but I can take the top rollers of the head sled completely off the top of the post as the gear housing come up and hits the z drive mount above it. Extra wheelbase on the z sled in the form of 4 skate bearings riding the machined area of the post either side of the gibs solved some
Re: [Emc-users] Possible New Lathe
Boris? Obviously, an oversize Van Norman vertical mill, I'd say 7,000 lbs or so. - Original Message - From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: Friday, March 27, 2015 11:45:16 PM Subject: Emc-users Digest, Vol 107, Issue 76 Send Emc-users mailing list submissions to emc-users@lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: Converting straight lines to arcs? (andy pugh) 2. Re: Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy? (Gregg Eshelman) 3. Re: Possible New Lathe (Gregg Eshelman) 4. Anyone have leftovers from a 9x20 CNC conversion? (Gregg Eshelman) 5. Re: Possible New Lathe (Gregg Eshelman) 6. Re: Velocity closed loop + Position losed loop on an axis (Jon Elson) 7. Re: Velocity closed loop + Position losed loop on an axis (Karlsson Wang) -- Message: 1 Date: Sat, 28 Mar 2015 00:36:39 + From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Converting straight lines to arcs? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: CAN1+YZVdhS=mnazvq02zh_qyjpfjslncriremqhknmhhrdx...@mail.gmail.com Content-Type: text/plain; charset=UTF-8 On 28 March 2015 at 00:13, Gregg Eshelman g_ala...@yahoo.com wrote: Will it allow saving/exporting the modified G-code file? It looks like that is _all_ it allows. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Message: 2 Date: Fri, 27 Mar 2015 19:57:55 -0600 From: Gregg Eshelman g_ala...@yahoo.com Subject: Re: [Emc-users] Tsudakoma TRNC-201S on a bridgeport Interact Series II? Crazy? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 55160aa3.30...@yahoo.com Content-Type: text/plain; charset=utf-8; format=flowed On 3/27/2015 6:41 AM, Igor Chudov wrote: Andy, this BP has a 30 taper spindle. It is actually quite big. I put a servo motor (really a DC motor with encoder that I added) on the knee, so the knee goes up and down easily, it is called W axis and it is very handy. The vertical envelope of this milling machine is quite big. This machine itself, a knee mill, is much bigger than the usual bridgeport, it weighs at 5,000 lbs or something like that. Called Series II Interact 2. Ah. The Super Beetle of the Bridgeport line. Better in so many ways that the previous model, then for some reason they quit making it and went back to the original design, though somewhat adjusted/tweaked. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- Message: 3 Date: Fri, 27 Mar 2015 21:10:23 -0600 From: Gregg Eshelman g_ala...@yahoo.com Subject: Re: [Emc-users] Possible New Lathe To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 55161b9f.1080...@yahoo.com Content-Type: text/plain; charset=utf-8; format=flowed On 3/27/2015 9:08 AM, Bruce Layne wrote: In communist Russia, lathe turns YOU on! I'm looking forward to seeing your newly converted CNC lathe. I'd name her Natasha. But then what is Boris? --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- Message: 4 Date: Fri, 27 Mar 2015 21:28:12 -0600 From: Gregg Eshelman g_ala...@yahoo.com Subject: [Emc-users] Anyone have leftovers from a 9x20 CNC conversion? To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 55161fcc.9070...@yahoo.com Content-Type: text/plain; charset=utf-8; format=flowed I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box with 9 speeds... I wonder if any combinations would be duplicates? I milled out the channel in the saddle last night but not as drastic as Denford did on the ORAC Compact 8 clone. I'll be using white acetal to make the nuts and replace the wee little cross slide screw with a 3/8x10 ACME and the leadscrew with a 1/2x10 ACME. Cross slide motor out the back and addons made to not restrict the slide travel, not like how Denford cut off the rear of the slide at the nut because the ORAC had a plate attached to the rear of the saddle. --- This email has
Re: [Emc-users] Velocity closed loop + Position losed loop on an axis
Sounds good. On Fri, 27 Mar 2015 20:54:31 + andy pugh bodge...@gmail.com wrote: On 27 March 2015 at 20:44, Karlsson Wang nicklas.karls...@karlssonwang.se wrote: It is possible, i can't see it anymore. As I understand it, the encoder edges are timestamped by either the system clock or a high-res counter in the FPGA, so at any point the calculation is based on the total number of edges seen and the actual time that the first edge seen and the last edge seen were registered. This allows a much more accurate calculation than just number of edges this servo cycle. The difference is especially marked when there are edges less often than once per servo thread -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- 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 -- 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] Anyone have leftovers from a 9x20 CNC conversion?
On Friday 27 March 2015 23:28:12 Gregg Eshelman wrote: I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box with 9 speeds... I wonder if any combinations would be duplicates? I believe that any combo would be the same as mirroring the combo, eg 3rd gear on box 1 and 5th gear on box 2, would be identical to 5th gear on box 1 and 3rd gear on box2. So while 1st gear in both boxes would be a set stakes and call a surveyer slow, there would not be the 81 variations with no dups. To me, with the capability in LCNC to lock axis motions together, it made more sense to put a bigger HP treadmill motor on mine, with a fixed 3/1 reduction before it got to the backgear. With a fwd only toroid mod to one of Jons servo amps, and an old 1500 WA phase linear audio amp power transformer for a motor psu, it could turn the spindle in a much bigger lathe than my toy 7x. I can still get to 1500 rpms, not fast enough for real CSS at small diameters, but usable for above 0.75 OD stuff. Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene -- 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] Possible New Lathe
On Friday 27 March 2015 23:30:50 Gregg Eshelman wrote: On 3/27/2015 10:44 AM, Gene Heskett wrote: On Friday 27 March 2015 11:08:18 Bruce Layne wrote: I'm looking forward to seeing your newly converted CNC lathe. I'd name her Natasha. FWIW, I'd like to see the conversion process in pictures myself. Tee hee. I can see it now, a polished brass laquer coated nameplate someplace obvious, engraved Natasha, and the lettering backfilled with hot pink paint worthy of a grand lady. At 3080 lbs, moving it will be a problem, and seeing how you solve that would be interesting too. Does this paint make my tailstock look fat? Chuckle, yes... --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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 Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene -- 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] Anyone have leftovers from a 9x20 CNC conversion?
On 3/28/2015 3:05 AM, Gene Heskett wrote: On Friday 27 March 2015 23:28:12 Gregg Eshelman wrote: I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box with 9 speeds... I wonder if any combinations would be duplicates? I believe that any combo would be the same as mirroring the combo, eg 3rd gear on box 1 and 5th gear on box 2, would be identical to 5th gear on box 1 and 3rd gear on box2. So while 1st gear in both boxes would be a set stakes and call a surveyer slow, there would not be the 81 variations with no dups. To me, with the capability in LCNC to lock axis motions together, it made more sense to put a bigger HP treadmill motor on mine, with a fixed 3/1 reduction before it got to the backgear. With a fwd only toroid mod to one of Jons servo amps, and an old 1500 WA phase linear audio amp power transformer for a motor psu, it could turn the spindle in a much bigger lathe than my toy 7x. I can still get to 1500 rpms, not fast enough for real CSS at small diameters, but usable for above 0.75 OD stuff. I'm thinking of a much less expensive way to put a gearbox on an old Montgomery Ward manual lathe. One box of 9 ratios isn't as good as the 5 and 8 position dual lever (and hard to find+expensive) Logan original. A New-All or one of the other 1 or 2 old brands of aftermarket boxes are even harder to find. I need to be finding some good ACME rod for the 9x20 CNC, motors etc. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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] Anyone have leftovers from a 9x20 CNC conversion?
On 3/28/2015 3:05 AM, Gene Heskett wrote: On Friday 27 March 2015 23:28:12 Gregg Eshelman wrote: I've an idea for a project involving a pair of 9x20 9-speed quickchange gearboxes mounted side by side, with a filler between and three gears to couple the output of one to the input of the second. I'll have the gearbox off my $50 9x20 but need another. 9 speeds on one box feeding a second box with 9 speeds... I wonder if any combinations would be duplicates? I believe that any combo would be the same as mirroring the combo, eg 3rd gear on box 1 and 5th gear on box 2, would be identical to 5th gear on box 1 and 3rd gear on box2. So while 1st gear in both boxes would be a set stakes and call a surveyer slow, there would not be the 81 variations with no dups. To me, with the capability in LCNC to lock axis motions together, it made more sense to put a bigger HP treadmill motor on mine, with a fixed 3/1 reduction before it got to the backgear. With a fwd only toroid mod to one of Jons servo amps, and an old 1500 WA phase linear audio amp power transformer for a motor psu, it could turn the spindle in a much bigger lathe than my toy 7x. I can still get to 1500 rpms, not fast enough for real CSS at small diameters, but usable for above 0.75 OD stuff. I'm thinking of a much less expensive way to put a gearbox on an old Montgomery Ward manual lathe. One box of 9 ratios isn't as good as the 5 and 8 position dual lever (and hard to find+expensive) Logan original. A New-All or one of the other 1 or 2 old brands of aftermarket boxes are even harder to find. I need to be finding some good ACME rod for the 9x20 CNC, motors etc. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- 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
