RE: [CAD_CAM_EDM_DRO] freqmod, what is it?

I run freqmod with 4 CMD-260 drivers on my system with no problems and get
good performance. I am using CMD-260 drivers set for 2000 steps per rev
with 20 tpi lead screws which is 40000 steps per inch. This gives me very
smooth performance with freqmod and acceptable performance with steppermod.
You need to make sure the emc.ini files has STEPPING_TYPE variable set to 0
for step and direction drivers. You will also need to have OUTPUT_SCALE and
INPUT_SCALE set to the same values. If I can be of any help, please email
me off list and I will see what I can do.

John Guenther
'Ye Olde Pen Maker'
Sterling, Virginia

> -----Original Message-----
> From: Paul [mailto:no.spam27@...]
> Sent: Saturday, August 16, 2003 18:05
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] freqmod, what is it?
>
>
>
> Hi Tomp
>
> freqmod is capable of producing step/dir, two phase, quadrature, and four
> phase outputs. The default is step/dir.
>
> It sounds like you need to add some deadband to each of the axis
> selections
> of your ini file. I'd suggest a value equal to half the
> resolution of your
> system. i.e. if you have 1000 steps per inch, set DEADBAND = 0.0005
>
> Regards, Paul.
>
>
> On Saturday 16 August 2003 5:25 pm, tomp_tag wrote:
> > I've only got what I read to figure out what freqmod is. And
> I'm confused.
> > I tried it with the CMD260 amps but the motors just rocked back
> and forth
> > one step. I had read that this freqmod is the latest & greates
> and so much
> > better than
> > steppermod. Then I read that is was for some special NOT step & dir amp
> > used on some Bridgports, and that it generates the 'wave' to a
> simple amp.
> > Is it used with step & dir type amps? If so what was the
> > rocking/oscillation
>
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