RE: [CAD_CAM_EDM_DRO] BDI steppermod gives following errors

Jon,

Thanks, I'll change the acceleration rates down to something more
reasonable, I was just using what was the default in the emc.ini file that
came off the CD.

I will also bump the MIN_FERROR parameter up to your suggested value of .05
and see what that give me.

Your help is gretly appreciated, not only with this problem but for all of
the contributions you and everyone else has made to making EMC a really good
product.

John Guenther

> -----Original Message-----
> From: elson [mailto:elson]On Behalf Of Jon Elson
> Sent: Friday, August 24, 2001 2:46 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] BDI steppermod gives following errors
>
>
> jguenthe wrote:
>
> > Ray,
> >
> > Here is the emc.ini file for my configuration. I am including
> it in this
> > message for convience.
> >
> > DEFAULT_ACCELERATION = 20.0
> > MAX_ACCELERATION = 20.0
>
> I think these are your problem. That is a LOT of acceleration.
> I'm using 2.0 on my pretty responsive servo system. Since your user units
> are inches, 20 IPS^2 is a lot of acceleration, almost certainly
> too much for
> a real stepper system, anyway.
>
> > FERROR = 1.000
> > MIN_FERROR = 0.010
>
> The min_ferror parameter sounds a little small. You can try
> turning it up to
> 0.05 inch or so, to allow a little more lag before the following error is
> triggered.
>
> > This all has me quite perplexed, and I still don't understand
> why steppermod
> > has the overwhelming desire to write over the emc.ini file
> every time you
> > run it. That really doesn't make sense to me since freqmod
> doesn't do this.
> > If I had a more powerful laptop to run this on I most certainly would be
> > using freqmod.
>
> This is so that changes in calibration, etc. can be written out to the
> .ini file. I suspect freqmod does this, too. I know that the
> servo versions
> of EMC do this. (Anyway, freqmod or steppermod are not involved in this,
> as they are running in the real time environment, and have no access to
> the file system. Is it the task controller that reads (and
> writes) the .ini
> file?
> I'm not sure, but I think so.
>
> Jon
>
>
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