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Posted to both CAD_CAM... and EMC Lists I'm working up a page for the emc handbook <www.linuxcnc.org> on PID axis tune and would like stuff from as many as have worked with tuning. (emc or other)

Tim Goldstein wrote:

G'Day from Down under, This is my first time to put my 2 cents worth in, I have been lurking in the shadows for a while now. I own and operate a very small one man business, here in Oz. I have two cnc

From: http://www.isd.mel.nist.gov/projects/emc/emcsoft.html Output Parallel Port ------ ------------- X direction D0, pin 2 X clock D1, pin 3 Y direction D2, pin 4 Y clock D3, pin 5 Z direction D4,

I know I had some information on which pins do what for driving a stepper from the parallel port for one parallel port. I can't find what I had and now I have two ports for the Bridgeport IO and I

Ward, Check out Steve Lindsay's site at : http://www.nyx.net/~slindsay/dro.html to pick up DRO40; you might also check the 1999 retired files in the dropbox as I believe they are there also. Art OLDER

That is why I gave up on steve's software and wenbt with Tom Kulaga's design. Dan

You might be right .. theory and the real world are rarely in sync. Good question, although neither may be important. Torque is roughly proportional to core characteristics, so increasing the current

freqmot P, I, and D have an effect when you use freqmod or smdromod, but not when using steppermod (which will eventually be phased out [no pun intended ;) ] unless someone really needs it). Matt

Hi Paul, Have a look at:- http://www.southwest.com.au/~jfuller/sio.html and http://www.dage.net/parport.html These are the circuits I based my test board on. Ian -- Ian W. Wright Sheffield UK

Where would I find the dro40 and dro40a programs? I'd like to give them a try as well. Ward M.

Art, You hit it right on the head! When I ran dro40a instead of dro40 it works like a champ :>) I guess it's another case of when in doubt read the instructions. Thanks again for your help, now I'm

EMC now is handling steppers as if they were servos from what I understand (this may only be with the freqmot setup & the DRO setup?) and using freqmot I can confirm that P,I, and D definitely have an

Does the P gain affect stepper motion? Darrell

Terry, You may have the same problem that I have and that is the "switch" that needs to be set on the parallel port. Have you tried using the DRO40A.exe program instead of the DRO40.exe?? This is

Art, I need some help here, I put together a circuit using a 74hct14 like you did but I can't seem to get it to work with a computer. When I run Steve Linsay's dro40 program it doesn't react to the

Dave, Ian, and other EMC folk I just posted a TclTk script to the dropbox and to emc@... based on Fred's code. It watches the parport and reports status of the pins. You may have to fix it so it

Hi Drew,

Hi, George, I did all this and got no error messages at all, however, I still don't seem to have a steppermod.o file or a freqmod.o file anywhere on the system ( in fact, the /plat/linux_2_0 and

Hello! First thak you Jon Elson for information about EMC and STG2 board. Now I?m decided to use EMC to retrofit my mill. Maybe I should give some background what i do and which kind of machines i