RE: EMC Question. I have looked on the FAQ :(

["j.guenther" <vze2z45u-at-verizon.net>]

Travis,

Try entering a G20 command to put EMC in inch mode and then see if you get
the proper motion out of your steppers.

If that works put the following lines in the emc.ini file:

; Startup codes for RS-274-NGC interpreter
RS274NGC_STARTUP_CODE =	G20

which will put emc in inch mode at startup.  I have had the same problem,
some one (Ray Henry I think) told me to enter G20 and the problem went away.
I had the problem on the earlier releases of the BDI, but it looks like your
emc.ini file does not contain the startup codes section.

Good Luck

John Guenther
Sterling, Virginia



> -----Original Message-----
> From: emc-at-nist.gov [emc-at-nist.gov]On Behalf Of Pierce, Travis O
> Sent: Thursday, July 11, 2002 10:49 AM
> To: Multiple recipients of list
> Subject: EMC Question. I have looked on the FAQ :(
>
>
> Hello,
> Thank you for your time, I know that it is valuable and I do not want to
> take up much of your time.
>
> I was looking for a answer to a question on FAQ that was not answered
> directly.
> Does the Steppermod.o actually use PID?  If so, why is it that the changes
> in the PID do not effect the
> stepping? If not then what does actually change the steps.  I
> have tried the
> Input_scale and output_scale to no avail.
> I do not get the out come that I expect.  Here is my ini file attached to
> this email. Very little has changed from the original file.
> I can get my motors to turn, but not at the correct turns per inch.  I am
> using a 20 TPI rod now and will change to better material later.
>
> I have calculated the input as 360 degree rotation at 1.8 degrees
> per step,
> that is 200 step per rotation.
> now the lead screw is 20 TPI or 0.05" per thread 1 rotation, now using the
> equation. 200/0.05" = 4000 steps.
>
> My motor turns about 1/8 of a turn and stops. It should turn 360 degrees.
>
> I am running BDI install. 2.12.--- on three different machines
> and I get the
> same out come.
> All machines are from a pent. 100 to a pent.266MHz.  All have
> 128mb Ram and
> plenty of HDD.
>
> Travis Pierce
> Xerox Engineering Systems
> Research & Development
> 317 Main street
> Rochester, NY 14445
>  <<Travis-mini.ini>>
>