Re: cheap high speed servo control

Thanks JJ, I'll check it out. Please feel free to kick away.

Graham

--- In CAD_CAM_EDM_DRO@y..., "JJ" <jj5412@e...> wrote:
> Commercial sewing machines perform a similar function. They begin
with
> the needle up, spin up to x,000 rpms, slow and stop with the needle
up
> or down, as required. Repeat ad nauseum. Thought you might look into
> some of their web sites to see the technology used (Phaff, Juki,
Singer,
> etc.). The older machines use a clutch motor with a stepper/servo to
> position the needle. Newer ones uses servos only, I believe.
>
> Sorry, for kicking a dead horse, just trying to help.
>
> Regards,
> JJ
>
> Be Kind, Be Careful, Be Yourself
>
>
>
> > -----Original Message-----
> > From: Graham Stabler [mailto:eexgs@n...]
> > Sent: Tuesday, August 13, 2002 6:18 AM
> > To: CAD_CAM_EDM_DRO@y...
> > Subject: [CAD_CAM_EDM_DRO] cheap high speed servo control
> >
> >
> > I am currently designing a coil winding machine for small hot
> > air bonded
> > bobbinless coils, one thing I would like is a servo motor as
> > the spindle
> > to allow good speed control as well as angular control at the
start of
> > winding. i.e. I want to be able to drive it quickly (up to
> > 3000rpm) and
> > then use it more like a stepper motor during wire attachment etc.
> >
> > The gecko drive units look good but would I be correct in
> > assuming that
> > the servo could not be run at speeds as high as 3000rpm? The max
step
> > rate is 250khz so I suppose it depends on the encoder.
> >
> > Are there any other fairly cheap drivers that might allow me to
drive
> > the motor both at high speed and in step mode? I will
> > probably run the
> > machine from a microprocessor which will be given winding
> > constants (no.
> > of turns etc) via a pc link.
> >
> > Sorry if this is as clear as mud.
> >
> > Graham Stabler
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >
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> >
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