Re: EMC/STG II homing problem

["Melvyn J. Marple" <marplem-at-ix.netcom.com>]

Hi Les,

This seems to be a problem that comes up from time to time. I discovered the
same (or what appears to be) problem almost two years ago when interfacing
EMC
and a STG II card to a Hurco mill. It seemed in my case that the index pulse
was not recognized by EMC. Just as in your case, everything hardware-wise
seemed to be there. My work around was to un comment the NO_INDEX_PULSE in
the extstgmot.c module and recompile. This makes the software ignore the
index pulse
for homing and therefor a little less accurate. I still would like to see a
solution
but have not seen anyone put forth such. See the thread around the 9/21/01
for more.

Regards, Mel    


> [Original Message]
> From: Les Watts <leswatts-at-rabun.net>
> To: Multiple recipients of list <emc-at-nist.gov>
 > Date: 3/6/02 3:49:41 PM
> Subject: Re: EMC/STG II  homing problem
>
> 
> Hi George!
> 
> Yep I tested all inputs to the card with the scope.
> Got good signals. I expected this as the diagnostic program
> sees the switches and index fine.
> 
> I have roughed in pid an run some g-code programs today
> with no problems.
> 
> It is not the end of the world if the homing function does not
> work.... but it's not good!
> 
> I can drive the axes into a hard stop at low gains and restart
> EMC for the time being to get a home.
> 
> Gotta find out what's wrong.
> 
> Les
> 
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA
> http://www.rabun.net/~leswatts/wattsfurniturewp.html
> ----- Original Message ----- 
> From: "George P. Tecos" <george.tecos-at-panautosys.com>
> To: "Multiple recipients of list" <emc-at-nist.gov>
> Sent: Wednesday, March 06, 2002 2:20 PM
> Subject: Re: EMC/STG II homing problem
> 
> 
> > 
> >    Hi Les:
> >   I have been reading your e-mail and I sympathize with
> > the problem of homing. I do not know if  this can help you
> > or not. Install your scope at the inputs 47, 39 ,31 and try to
> > close or open the home limit switches at that time observe
> > if the states of the inputs change ;if they do, then maybe you
> > have to check the software.Just an idea.
> > Good luck.
> > George Tecos
> 
> 



--- Melvyn J. Marple
--- marplem-at-ix.netcom.com
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