Re: [Emc-users] steppers

> Could you give me some idea of what the advantage is of using 2 and 3 > > stack steppers? Perhaps I'm in over my head here, but I'll share what I think I know. The tendency for 2 to 3 stack steppers is for the magnetic circuit inside to get too long, and create high inductance for the am

Re: [Emc-users] Trajectory planning and other topics from a, EMC(LinuxCNC) newbie (TheNewbie)

From: Viesturs L?cis Subject: Re: [Emc-users] > This will run in a little off-topic by me... > You can run heavy duty machines with steppers, but then the > performance will suffer - You will have to leave big safety margin in > terms of load to motors (either move slower or use way much larger >

Re: [Emc-users] Trajectory planning and other topics from a, EMC(LinuxCNC) newbie (TheNewbie)

I am a bit behind due to trying to get my EMAIL machine upgraded to a newer model I received as a hand me down. The on board video stymied every distribution except puppy! I eventually was given an older PCI-X video card that allowed me to install main stream distros, and now I've pretty much

Re: [Emc-users] Relay driver not working

On 04/20/2012 06:20 PM, Peter C. Wallace wrote: > A dozen or so shorted I/O lines is unlikely to cause FPGA damage (ask > me how I know) I can imagine... 5 years from now someone is looking at a LinuxCNC configuration using a MESA card and wonders "Why is he using stepper outputs 4, 5 and 6 for

Re: [Emc-users] the state of the Wiki

for section 2 Getting Started. I have not yet gotten too far with CAD/CAM to generate gcode, but I have a suggestion to run up the flagpole to see if anyone salutes. I suggest we select 2 CAD/CAM solutions to include on the CD, with special support in the wiki. One would allow complex thin

Re: [Emc-users] Electronic damping of stepper mid-band resonance, was Re: Drive Tuning

I don't see how they could switch from 1/10 to full step without letting LinuxCNC know, and having LinuxCNC reduce the number of steps being sent, unless they used a clock multiplier, which would make it look like full step to the control, and just use microstepping to smooth out the full steps

Re: [Emc-users] OT-Retrofitting machines

On 05/12/2012 10:15 AM, k...@gmail.com wrote: > There is a bit of talk on some machine shop forums, arguments perhaps, that > retrofitting a machine is a waste of time. > And that it's time and money well spent to just buy a good used > machine and move on with making money with it. > Any comments

Re: [Emc-users] Setting coordinate systems

On 05/19/2012 06:06 AM, Erik Christiansen wrote: > It scares me that coordinate offsets could be cumulative. Coordinate > offsets (workspaces) should not nest, I believe. I have not read > anything in the doco to say that they do. That doesn't scare me at all, as long as the documentation is cle

[Emc-users] Encoder discs

While I can see the need (sometimes) for a durable metal encoder disc, and I have cut some out of .016" copper (was on hand, and never got tested), I wonder how useful, or how durable laser printed transparency film would be for many applications. Two of them glued back to back with the pri

Re: [Emc-users] Encoder discs

The eps file is vector graphics, it can generate as fine detail as you need. When I used GIMP to output to .JPG I got very good resolution, but I had to ask for it. Try this: 1. Right click on the .eps file. 2. Click on "Open with". 3. Click on GIMP. 4. The dialog "Import from PostScr

Re: [Emc-users] Encoder discs

On 06/02/2012 04:27 PM, cogoman wrote: > The eps file is vector graphics, it can generate as fine detail as > you need. One thing I forgot to mention, with this technique, your printer's resolution is the limiting factor, and with modern printers, it's usually not very l

Re: [Emc-users] Encoder discs

you need. On 06/02/2012 03:58 PM, gene heskett wrote: > Thanks cogoman. This would be useful if I had room for a 6" OD wheel, but > my limit in the space I have is about 2.7" in diameter. %! Postscript utility for printing multiple encoder wheels /inch {72 mul} def

Re: [Emc-users] 3D Printer Parts

On 06/11/2012 11:56 PM, Jeshua Lacock wrote: >> But that is also a 15V part IIRC. But that's ok - the only reason the >> > Makerbot uses a PC power supply is because they are dirt cheap and TUV >> > certified. You can use any supply you want. I use 15V supplies. > OK, that was my main concern.

Re: [Emc-users] Brushless Servo Selection?

I'm concerned that you are about to make a mistake, and waste a lot of money. 450 Oz-in. steppers are pretty hefty devices. The mill we use at work has servo motors rated for approximately 500 oz-in. maximum, and they are expensive to replace. These have all the grunt we need for a lot of

Re: [Emc-users] quick boot

I know there is an appeal for a controller that can do wifi and other neat things, but just in case this could be the solution you didn't know you needed: http://www.megasquirt.info/ A few years back an open engine controller was designed. I think this is the latest version of it. The advant

Re: [Emc-users] Brushless Servo Selection?

On 06/14/2012 10:33 PM, Jon Elson wrote: > Thats inch-POUNDS! 16 times inch-Ounces. > 56 In-Lb is 896 Oz-In, so you have made a mistake. Also, steppers, > ESPECIALLY Thanks. I don't have an intuitive feeling for N-m measures, so for quite a while I have been making this mistake in my head. I h

[Emc-users] EMC2 Servo on the cheap

where I work we have a Shizuoka with an old Bandit control. The three servo drives still appear to work. It has tachometer feedback to the servo drives, and resolver feedback to the computer portion, which is in a coma. I would like to convert this to an EMC2 servo system with quadrature enc

Re: [Emc-users] EMC2 Servo on the cheap

Thanks Kirk , Tom and Jon for the quick replies, and the good suggestions. The time frame is very loose. We have a FADAL 4020 that's been doing all we need for years, and another one that's been dead for years. At the end of last year I mentioned to the machinist that we should probably get

Re: [Emc-users] EMC2, Compensating for friction

On 02/03/2011 02:49 PM, emc-users-requ...@lists.sourceforge.net wrote: > Les, I thought that friction is not at all proportional to speed? > > It is a value that only depends on the direction (sign) of speed, not on the > value of speed. > > Am I mistaken? If I remember properly, Tormach goes over

Re: [Emc-users] Machine tapping was Encoders with no Index (Przemek Klosowski)

We use thread forming in 6061-t6 all the time where I work, and the threads are quite strong (even when the hole was a little oversize). What hasn't been mentioned is that as the hole becomes larger, the forming tap creates a pair of threads, or a double start situation. The second start is n

[Emc-users] Temperature Controller with nested PID loops

I have an unusual application that might be great for EMC2. I have a small block of aluminum that need to be heated to a specific temperature. Currently we put it in a chamber, and heat the chamber to... let's say 80 degrees C. Soak for 1/2 hour an it's ready to test. When it comes out, and

[Emc-users] My first wiki page

Kent suggested I add some information about stepper motor speed limitations to the wiki. I tend to never finish anything because it's never good enough. This isn't good enough, but it's up there. It's titled: * Stepper Motor Speed Limitations

Re: [Emc-users] Emc-users Digest, Vol 58, Issue 67

> From: gene heskett Subject: Re: [Emc-users] My > first wiki page snip > I must say also that since the complete step is now handled in one cycle of > the base thread, I haven't noticed my motors playing tunes as they change > speeds, it is MUCH less obvious, and that has opened up another octa

Re: [Emc-users] My first wiki page

From the previous posting of this I guess you can tell I get the list in digest form! 8-) > From: gene heskett Subject: Re: [Emc-users] My > first wiki page snip > I must say also that since the complete step is now handled in one cycle of > the base thread, I haven't noticed my motors playi

Re: [Emc-users] Guidance on usb comp

On 02/24/2011 01:35 PM, emc-users-requ...@lists.sourceforge.net wrote: > It would be nice if there was a way to interface CNC equipment via USB such > that the timing of actions was being scheduled in the controller rather than > by the host O/S. > > That way it would not be necessary to run a spec

Re: [Emc-users] OT made a new milling enclosure

On 04/08/2011 10:30 AM, emc-users-requ...@lists.sourceforge.net wrote: > Message: 3 > Date: Fri, 8 Apr 2011 06:54:27 -0500 > From: Igor Chudov > Subject: Re: [Emc-users] OT made a new milling enclosure > To: "Enhanced Machine Controller (EMC)" > > Message-ID: > Content-Type: text/plain; char

Re: [Emc-users] Suicide brakes on an AC universal motor?

On 06/01/2011 07:36 PM, emc-users-requ...@lists.sourceforge.net wrote: > The resistor I did use when I was building the interface for my mills > spindle, because I read someplace that a dead short could result in field > demagnetization under the right conditions. There I used a 20 ohm 20 watt > r

[Emc-users] Axis naming X Y Z E, can I have that?

This is only a band-aid approach, but it gives me a chance to plug the "Stream Editor". The stream editor "sed" when used with an edit file is kind of like a super-colossal macro generator. It is VERY cryptic when you first get started, but with just a little knowledge of how to use it, it ca

Re: [Emc-users] How can I create my own functions table for named subroutines

In the past I have thought that it would be great to have a feature in EMC2 like the C pre-processor, that would do some automatic replacements to allow the original G-code to be more readable. It seems like two threads here can collide, and the solution for the thread on substituting A for E

Re: [Emc-users] OT -- Ethernet thermometer?

You guys amaze me! There must be at least 7 different solutions to the problem here, and ultimately, you solved his problem with a solution that may cost him nothing! And that tip about orienting the dial is very valuable too! I have been thinking about all the toys and routers and stuff

Re: [Emc-users] bad news, xylotex died

I read in Machine Design, or some other tech mag in one of those device forensics columns about a company that was getting their servo drives back from just one company at a rate of 4 failures a month. The engineer sent to check on it did some checking before he left and found that there was me

[Emc-users] Questions about your Stepper kit

It's not so much the 2.1 ohms, though that can be an indication of high inductance. It's the 9mH per phase that slows you down. If you take a quick look at the graphs in the following WIKI page: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Stepper_Motor_Speed_Limitations they will give you

Re: [Emc-users] Old ssh -Y problem is back

From: Erik Christiansen > But if the additional script is used, it can also open mutt in an xterm > in the top right corner, Maybe you can solve a problem that I have been having. I have been trying to get an icon on the desktop in Puppy Lucid 5.25 to open up an xterminal with the default di

Re: [Emc-users] Old ssh -Y problem is back

rawl, and someone on here mentioned to someone else that the mailbox may be getting too big. Now I have a mailbox for volumes 30-39, volumes 40-49, etc under my main CNC mailbox. I set up message filters like so: if Subject contains "Vol 7" move message to "Volume 70-79" on cogom

Re: [Emc-users] Old ssh -Y problem is back

On 08/02/2011 03:06 AM, Erik Christiansen wrote: > Together, I'm sure we can make it do what you want. IIUC, that is to > start the xterm in a directory other than $HOME. (i.e. '.' is > /some/other/directory) Thanks, You gave a lot of options to try. I suspect oat least one will work well! I'l

[Emc-users] live cd staleness

terminal. Then click on: System-->Administration--> Users and Groups On the left click on the user you are just to highlight it. Then on the right, password should say 'none'. Click on 'Change' to the right of none. Then you can enter a new password,

Re: [Emc-users] Questions about your Stepper kit

On 08/11/2011 08:28 AM, Mark Wendt wrote: > I knew about the properties of the torque fall-off of steppers, and > that servos generally kept their torque at higher rpms, obviously much > better than steppers. i was just wondering why motors were listed with > power ratings rather than torque

[Emc-users] Parallel port messages... What happens?

What is the sequence of messages sent and received to an FPGA parallel port servo card at each servo interval? I looked on the wiki and couldn't find this information. What all goes on when controlling 3 servos over the parallel port? --

Re: [Emc-users] Parallel port messages... What happens?

On 08/12/2011 02:10 PM, andy pugh wrote: > This is a simplification. Address auto-indexing and translation ram > (where contguous memory addresses link to non-contiguous registers) > confuse the matter. > > Why are you asking? This is a simplification. Address auto-indexing and translation ram (wh

Re: [Emc-users] Parallel port messages... What happens?

I just looked at it briefly. Actually not too briefly, but if what I need is in there (and it might be) it's going to take a bit longer to find and understand it. The AVR code isn't an issue since I was hoping to use one of the much faster ARM micro-controllers out there. Thanks. On 08/

Re: [Emc-users] 3-phase pwmgens for 7i39

On 09/30/2011 07:52 PM, emc-users-requ...@lists.sourceforge.net wrote: >> > Is there any chance that I have to set something that is not 8? That >> > Keling's spreadsheet says that motor has 8 poles. It took me a while to find this web page: http://www.southernsoaringclub.org.za/a-BM-motors-3.ht

Re: [Emc-users] VFD Speed Input

On 10/02/2011 01:38 PM, emc-users-requ...@lists.sourceforge.net wrote: > After having more experience with getting my PWM to VFD input working, > it comes to my mind that what is behind the VFD input is an ADC, which I > think takes a snap shot (sample/hold) at a frequency. I seem to recall > one V

Re: [Emc-users] Simple DC motor controller

On 10/05/2011 11:36 AM, emc-users-requ...@lists.sourceforge.net wrote: > The problem with the power-amp ideas is that that I don't see how that > would drive the motor in the reverse direction, I think an H-bridge is > needed. (unless we were to hold one terminal of the motor at 6V, and > drive the

[Emc-users] ASCII drawing program

emc-users-requ...@lists.sourceforge.net wrote: > Cogoman: > > A quick Google search suggests JavE might suit. > > It's just my two-cents worth, but I think you'd be better off just using > the drawing tool you like best and placing a png or pdf file of the > result in one of the file-d

Re: [Emc-users] Need help with servo tuning

On 10/07/2011 10:16 PM, emc-users-requ...@lists.sourceforge.net wrote: > SIG and TAC are attenuators for the velocity command input and the > tachometer input. > CLM is current limit. BAL is the zero offset. TC is most likely the > loop compensation > on either the torque loop or velocity loop. I

[Emc-users] Scopes

Seems like a zillion years ago, when I was young and dumb, I bought a used Phillips PM3212 25MHz triggered sweep dual trace scope from a vendor at the Trenton Computer Fair. I wasn't dumb enough for them though. They sold it without scope leads, so I found some bare copper wire and took it ove

Re: [Emc-users] emc install

On 12/14/2011 06:59 PM, emc-users-requ...@lists.sourceforge.net wrote: > hello , bought a dell about 2 months ago, loaded with ubuntu 10.10? realized > that wont work with emc, so i downloaded the live cd (from a windows machine) > when i put the cd in the dell and try to open it it says it needs

Re: [Emc-users] also

On 12/15/2011 05:35 AM, emc-users-requ...@lists.sourceforge.net wrote: >> was thinking about this what if one was to attach a synchronus steppe as an >> encoder one could under drive it ( incresed sensivity,and resolution), put >> current limiting resistors inline (10 k ohm?) and opt isolate to p

Re: [Emc-users] Emc-users Digest, Vol 69, Issue 5

On 01/02/2012 01:46 PM, Kirk Wallace wrote: > I am hopping for a better 2012 too, and wishing for a speedy recovery to > all those on the mend. > -- I second this. I'll be praying. I had to pass on this little advice. For someone taking any kind of prescription drug for anything, ch

[Emc-users] pycam

On 01/03/2012 07:26 AM, matthew venn wrote: > Hi all, > > a few weeks back I asked about turning STL files from openscad to gcode for > my router. Pycam was suggested and I've been playing with that. > However the wiki is pretty bare, and the mailing list and archives are > pretty slim pickings too

Re: [Emc-users] Engrave.py cuts deeper and deeper

I am catching up on my EMAIL, and I've still got 10 EMC digests to read, but I wanted to comment on the quote below. This gives the impression that you are setting the PID values for the servo motor on the bench with nothing attached. This is not a good idea since these settings SHOULD be slug

Re: [Emc-users] Encoders

Note also, that if the pullup that's already there is very weak, the rise time would be slowed down, but the fall time would be fast. This could produce what we see in the encoder-a trace. The 1k pullups might bring that trace closer to 50% duty cycle. >> . I would think a 1 K Ohm >> resistor

Re: [Emc-users] MAXNC Open Loop Mill

> > > The machine is also somewhat different then most. It is set up with a > > Quadrature drive. > > Unlike a Step and Drive pin. You have two pins the are turned on and off > > in sequence. > | Seems an odd way to do it, but I read that EMC supports that yesterday | looking for something else

Re: [Emc-users] Encoders

If 120 ohms from the inputs to +5 is too much of a load, try 470 or 510 ohms. Any pull up action should work against the noise. If that's where the noise is attacking, some is better than none, and even 1K ohm might be enough to hold the noise at bay. Of course it's easy for me to talk, when I

Re: [Emc-users] Realtime Ethernet

| I am working on getting the Beagle Board (with TI's OMAP3530 processor) | | set up with a real time | kernel, but that hasn't happened yet. I have bought another Beagle | Board and accessories to | ship to Torsten Koschorrek (the RTAI maintainer for ARM-based ports). ... | A

Re: [Emc-users] Amp Enable Wiring logic.

LEDs usually have between 1.5 and 2.2 volts at 10mA depending on the color. Silicon rectifier diodes are the ones that have .6 volts across them at 10mA. | That's because of the sink arrangement. When the EMC2 output is High, | both sides of the opto-coupler LED are high, so there no current wil

Re: [Emc-users] MAXNC Open Loop Mill

I work with a Bandit Stepper system, and you should see the size of the heat sinks the drivers are attached to. Probably good for a 200 watt class b audio amp. They are constant current, linear drivers with decent voltage to drive the steppers quickly. > > True, though we desicussed this on I

Re: [Emc-users] Amp Enable Wiring logic.

The way you have IC1F and IC1C wired they make a voltage doubler. That voltage will eventually fry the input of IC1A. If you disconnect the left side (anode) of d1 and tie it to ground, the circuit should work (in a certain frequency range). If it worked once, then I believe this change shoul

Re: [Emc-users] Spindle Control

|Another option I have considered, is to use Hall sensors which would |work okay without an enclosure, but I seem to recall that Hall sensors |are not very fast, though engine crankshaft sensors seem to work well |enough. Here is a new encoder option on the market that looks very attractive, the:

[Emc-users] How many quadrature encoder counts per inch in a commercial servo system.

Thanks to Sven Wesley I was impressed by the AMT102-V Versapak quadrature encoder available at Digi-Key. With 2048 PPR, which could get 8192 quadrature increments it could give me a possible solution to a router axis drive. Using skateboard bearings to support a 5/16" rod, a DC motor could dr

Re: [Emc-users] Introduction

If you know what you need in a power supply, old stereo amps are lying around unused these days since everybody is switching to 5.5 channel home theater or better. Each half of a split supply for a 30 watt per channel 8 OHM amp is usually around 30-35 volts, safe for most stepper ICs that su

Re: [Emc-users] Emc-users Digest, Vol 47, Issue 30

If space is at a premium near the motor, and the torque requirement is light, you could use a string (some durable cord) tethered off to one side of the shaft, wrapped around the shaft once or twice, then draped over a pulley or two to get to someplace where you could mount a spring and a sol

Re: [Emc-users] stepper motor lock mechanism?

I apologize. I just sent this one, but forgot to paste the proper subject in, so this time it's correct. If space is at a premium near the motor, and the torque requirement is light, you could use a string (some durable cord) tethered off to one side of the shaft, wrapped around the shaft on

Re: [Emc-users] G52 and Fanuc conversion to EMC

That price seems overkill to me too. I have been thinking about trying to develop a product for just this kind of situation. The solution seems simple, and inexpensive. Take an AVR microcontroller and have it monitor the Q-encoder signals. The program would start out counting the time bet

Re: [Emc-users] G52 and Fanuc conversion to EMC

> PWM is unlikely to be able to generate voltages that are stable enough > for a servo drive. To increase smoothness of the PWM, you need to > either use a faster PWM base frequency or use a larger RC filter. Using > a fast PWM makes the resolution lower (for a given processor/crystal), > an

Re: [Emc-users] Mill is running when EMC isn't started.

Also it might help if power on to the machine is controlled by a relay which once turned on, holds itself in the on position. The operator uses a momentary contact switch to turn the machine on. If a glitch causes power to drop, killing the computer, the machine also shuts down. > Simple answe

Re: [Emc-users] part program exceeds machine limits

> I had a program that drilled a grid of holes in a plate. The plate was > bigger than my machine's travel limits, so I set up the program to do as > much as the machine could reach in one run. Then I moved the plate and > tried to use the same program to do another section of the plate, but

[Emc-users] reducing jitter at low speeds

I read this article in Machine Design a while back and thought it was very interesting. It was reprinted in their 2010 product locator, and I thought y'all would appreciate it. I also thought that if there were no patent issues, this might find it's way into EMC2. http://machinedesign.com/art

[Emc-users] Where's the 'C' source code

I am planning to work on a non trivial kinematics for a different kind of machine, and would like to find the source code for trivkins, as well as all the other kinematics sources. The section on non-trivial kinematics in the Integrator's Manual Is short and not very comprehensive. I found

Re: [Emc-users] Where's the 'C' source code

I knew they had to be together in one place. Thanks Jon, now the work begins! On 10/31/2010 01:54 AM, emc-users-requ...@lists.sourceforge.net wrote: > The kinematics routines are all in src/emc/kinematics, I see > > 8 different variants there. > > Jon

Re: [Emc-users] Where's the 'C' source code

Thanks Andy, I was kind of hoping that comp would be able to help create the kinematics module. > You can compile and install kinematics modules with comp without > recompiling everything else or needing all the sources. (I think you > need a header file or two) > http://linuxcnc.org/docs/html/

Re: [Emc-users] Expansion of EMC

On 12/09/2010 02:38 PM, Igor Chudov wrote: > I am extremely and openly critical of many open source products, but I have > to say that EMC2 is on top as far as documentation, ease of configuration, > etc is concerned. To add to this excellent support, and you would know why I > am very happy. EMC2

Re: [Emc-users] [OT] Charge Pump

On 12/12/2010 01:49 PM, emc-users-requ...@lists.sourceforge.net wrote: >> There is then a lot to be said for removing IC1C, so the slow input is >> > discriminated only once. If pins 1& 3 are then connected, any small >> > same-chip threshold variation will have negligible effect, because here >

Re: [Emc-users] CNC4PC Servo controllers

On 12/18/2010 08:35 AM, emc-users-requ...@lists.sourceforge.net wrote: > I was wondering if u could tell me what this means: Setting PFD, "Adjustable, > percent fast decay". The manual I got with my stepmaster stepper board says > this should be adjusted for each axis. It doesn't say what it does o

Re: [Emc-users] CNC4PC Servo controllers (a new Wiki page?)

of how to tweak this outline will be helpful. Thanks! On 12/19/2010 04:39 PM, emc-users-requ...@lists.sourceforge.net wrote: > On 12/18/2010 11:43 PM, cogoman wrote: > >> > On 12/18/2010 08:35 AM,emc-users-requ...@lists.sourceforge.net wrote: >> >>> >

[Emc-users] Driver characteristics (Stepconf Wizard)

On 01/08/2011 01:50 PM, emc-users-requ...@lists.sourceforge.net wrote: > I have attached the diagram of the stepper driver to this email. > The complete datasheet is here: > > http://en.nanotec.com/downloads/pdf/1067/imt901_en%5B1%5D.pdf > > Could someone please make the link between the diagram (t

Re: [Emc-users] DIY BLDC Motors - FCM8201,2 and IRAMS

On 01/23/2011 02:14 PM, emc-users-requ...@lists.sourceforge.net wrote: > Yes on the surface this looks like an esc project. However the fact > > that it has multiple interfaces supported such as CAN, i2c, pwm and > > serialmean that it can certainly send and receive the sort of data you > > are

[Emc-users] Jerky 4th axis motor rotor movement

Though it appears obvious that you aren't having this problem, since on a lot of discussions on PID timing, people seem to overlook this, I just want to mention this for the one guy listening who might be bitten by this otherwise. When you take a servo motor off a machine, you unload a lo

Re: [Emc-users] Absolute linear encoders

On 07/10/2012 05:57 PM, Peter C. Wallace wrote: If there is demand, it is probably not a difficult one to write. >Like a number of other components, the problem is having hardware to >test with, or someone to do the testing vicariously. Pretty sure the SSI interface works, but the BISS one requi

Re: [Emc-users] [Off] Ballscrew Support?

On 07/23/2012 03:05 AM, Jeshua Lacock wrote: > So I just got a response from my ballscrew vendor. They can supply a 40mm > diameter with 40mm pitch (3048 mm long) for a reasonable cost. Less than $1k > including shipping and machining. > > Looks like that could safely rotate at 977 RPM which woul

Re: [Emc-users] Docs/Messages

On 07/23/2012 10:45 AM, Stuart Stevenson wrote: > Maybe a debug gui with message tags at various places in the software to > display the control flow and where the current tag is stopped. Are you thinking of a program to comb through the log files looking for error messages that we know how to

Re: [Emc-users] USB badness, was Re: BASE_PERIOD and Intel D525MW boards

On 07/24/2012 07:08 AM, Kent A. Reed wrote: > Any thoughts? From what I've seen looking into USB 2.0 device programming, the transfers are too quick for most (maybe all) microcontrollers to keep up with in software, so you are generally tied to DMA transfers on the microcontroller side. FTDI

Re: [Emc-users] Spindle hooked to dc servo amp

On 07/17/2012 12:36 PM, Jon Elson wrote: > I don't use NFS, just sftp, and it works fine and is pretty easy to move > files around between > machines. Thanks for this tip, Jon. I have 3 machines here. The one (Compaq with Athlon 64 and obscure A8N-LA motherboard) that has my wife's and my EM

[Emc-users] .9 degree vs. 1.8 degree stepper used in RepRap

I was looking up something and came across a thread from a gent in Australia who was wondering if he could buy .9 degree steppers for his RepRap and get them to work, and one guy commented on stepper torque with a half truth for the situation. Apparently the norm for RepRap is 200 steps per

Re: [Emc-users] STOP RIGHT NOW...

On 08/04/2012 07:11 PM, Ron Ginger wrote: > Mach4, as it will ship, has only been underway since the first of this > year, and was demoed at the CNC workshop in June. It is intended the > first version, Mach-lite, will ship in September. I am working on the > Newfangled wizards for it and they are

Re: [Emc-users] solder paste

On 08/06/2012 09:49 PM, Jon Elson wrote: > I make my own stencils for these. It is kind of a pain, but I'm CHEAP! How about the cheapest CNC to build, an XY plotter like this: https://www.youtube.com/watch?v=WyLPpGdfR7s but with the laser from an old DVD burner for the pen. You could produce p

Re: [Emc-users] solder paste

On 08/07/2012 08:42 AM, ceen...@in-front.com wrote: >The majority of boards I run are double sided so all SMT processes are > performed twice. This is one of the reasons I would like a paste printer > because the manual stencil printer requires a lot of adjusting and fixturing > changes whe

Re: [Emc-users] STOP RIGHT NOW...

On 08/07/2012 02:58 AM, Kirk Wallace wrote: > If Mach comes up or can provide insight, I think anyone has the right to > defend or explore it here on the list, especially if one has first hand > experience with it. LinuxCNC users should be as open (minded) as the > software. I second this motion

Re: [Emc-users] HAL driver for EMIS Stepper - Board

On 08/07/2012 05:01 PM, Alexander Grill wrote: > Unfortunately I don't have a Step-Direction based card installed (I plan > to build a new one based on TB6560 or A3977, but that is rather a long > term goal). In the mean time, i want to use my old card (EMIS SMC-800), > which cannot be driven direc

Re: [Emc-users] HAL driver for EMIS Stepper - Board

On 08/08/2012 01:50 AM, Peter Blodow wrote: > The only problem is that speed is very limited to about 3.5 kHz max. > which keeps the machine slow. So, after about 15 years of service, I am > looking for a more modern board with a little more power (esp. in > voltage). Thanks for the hints. When

Re: [Emc-users] file sharing

On 08/11/2012 09:09 AM, jeremy youngs wrote: > I also > being the owner and moderator If we wanted to set it up here would > give all the files freely to the organization. I don't intend this in a mean way, but if you agree to a license, you are bound by that license. There was a woman who f

Re: [Emc-users] Final user of EMC2.

On 08/15/2012 09:26 PM, a...@conceptmachinery.com wrote: > I think problem again here. > I am not talking about UBUNTU. > I am talking about EMC2 2.2.5 and problem in DELETE file -program name- > from icon on EMC2 where one load new program. > When load file/program into EMC2 --EMC2 2.2.5 in my par

Re: [Emc-users] moglice, another note

On 08/26/2012 07:29 PM, jeremy youngs wrote: > I am thinking about lining my ways with this product any > thoughts? Tormach has a nice whitepaper about the design of their PCNC1100 that has me salivating to get one for myself. In it they have this quote: "There is a problem with it, however. P

Re: [Emc-users] Counting and saving to file

On 09/14/2012 03:53 PM, Stephen Dubovsky wrote: > Python can make database calls. Just write the lengths to a database. > Use database tools to do all the analysis like histogramming, etc. > Thats what they are very good at. Or, if the end user is handy with a spreadsheet, you could write it out

Re: [Emc-users] For anybody considering upgrading their motherboard in the next few months.

On 09/15/2012 01:26 AM, Przemek Klosowski wrote: > If there will be a well-designed and/or inexpensive hardware with this > chipset, it'll likely get reverse-engineered. Years ago I worked on an in-circuit test for a device called a bus monitor chip. It was supposed to be able to monitor memor

Re: [Emc-users] Counting and saving to file

On 09/15/2012 06:17 AM, andy pugh wrote: > That is what CSV is, "comma separated variables". The special > character is a comma. > It is also a really bad choice, as a large proportion of the world use > the comma as a decimals separator. I used to think it meant "comma separated values", and I thi

Re: [Emc-users] 100 watt 3 phase AC servo amplifier?

On 09/23/2012 03:57 PM, andy pugh wrote: > Indeed, using the actual Hall sensors is much better, I was just > saying that if the motor does not provide the signals then it is not > necessarily a complete show-stopper. Remembering an article in Machine Design about the CUI AMT303 commutating enc

Re: [Emc-users] Helical interpolation not quite round, WTF?

On 09/27/2012 09:41 AM, Dave Caroline wrote: > I would work better if you switch it on! There is someone at work who has done it to me so often that the first thing I say to her is "Did you plug it in? Did you turn it on?" One day she came to me and said something like "The computer's stuck i

Re: [Emc-users] Helical interpolation not quite round, WTF?

On 09/27/2012 11:19 AM, Dave wrote: > The first question you always ask, is there a power on light on the > front of the controller, and what color is it? That way they look to > make sure it is actually on. The power on indicator lights were always > green, but they don't know that. What a grac

[Emc-users] New Linux file system

I spotted on slashdot an item about Samsung creating a new file system for Linux 'F2FS'. It is specifically designed to work well with solid state flash disks "such as SSD, eMMC, and SD cards". I know some of you have used CF for your storage systems. Hopefully in the near future, instead

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