Re: stepping motors and freqmod

[kgramp-at-csc.com.au]

Joel,
Thanks for that.
Worked well. And it was the DEADBAND problem.

Karl.
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CSC
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"Joel Jacobs" <jj-at-netexp.net>-at-nist.gov on 18/07/2001 00:56:24

Please respond to emc-at-nist.gov

Sent by:  emc-at-nist.gov


To:   Multiple recipients of list <emc-at-nist.gov>
cc:
Subject:  Re: stepping motors and freqmod



If the oscillation is actually causing the motor to step back and forth
you'll need to add a bit to the 'DEADBAND' ini parameter - just a bit over
1/2 step is the norm.  I have mine set to .00015 (4000 steps/in).

If the oscillations are in the display only and the motor is calm simply
select 'commanded' instead of 'actual' for the display.

Joel

----- Original Message -----
From: <kgramp-at-csc.com.au>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Tuesday, July 17, 2001 2:09 AM
Subject: stepping motors and freqmod


>
>
> I am getting an oscillation on the last digit when using freqmod and
> stepping_type = 1.
> Should I be setting some other values to stop this?
> I have tried different values of output/input scale and ferror but no
luck.
>
> Can anyone help? Maybe a pointer to some documentation?
>
> Karl.
>
>