Re: [CAD_CAM_EDM_DRO] E-stop Problem + more

imranjawaid@... wrote:

> Hi,
> Finally I got my RTlinux 2.0 & emc configured with STG 2 card w/
> nikki denso drives & 2.1Amp AC servo motors.
>
> I ran testing in emc and motor run fine.
>
> 1) But I can't get out of ESTOP mode and can't do the machine on.
> Do i have to do connection for it?

Getting out of Estop requires a ground signal on pin 13 of the parallel
port
that is used for the auxilliary control outputs. It also requires the
limit switches
to either be satisfied with an in-limit condition, or to be overridden
with the
GUI button for that.

My e-stop and auxilliary control logic is on my web pages at
http://www.artsci.wustl.edu/~jmelson/EMC.html

>
> 2) also i can't figure out what should i write in (emc.ini)
> COUNTS_PER_REV = ?

I don't think this applies to servo systems.

>
> my encoder is mounted on the back of motor (no gearing) and it says
> P/R - 1000 , when i test by rotating motor shaft by hand with stg2
> dos software it counts 4000

Encoders with 1000 cycles/revolution will give 4000 transitions per
revolution,
and by counting all of them, you get 4000 counts per revolution.

>
> 3) the motor rotates very slow at 0v ,when I checked the DAC0 signal
> on P3 from stg2 it shows 0.1~0.15(approx) voltage accros it.

This is a small DC offset, and is normal. If there is a zero adjust pot
on the
servo amp, set it to stop the motor movement, or to zero the output
voltage.

>
> 4) where do i set emc axis limits in ini file

I think it should be pretty obvious. See
http://www.isd.mel.nist.gov/projects/emc/emcsoft.html
for a somewhat outdated descrption of the .ini file. There are
MIN_LIMIT and
MAX_LIMIT parameters, which should be in inches for imperial and mm for
metric machines, in other words the units specified with the UNITS
parameter.

Jon