RE: [CAD_CAM_EDM_DRO] 8 wire steppers, parallel. series or single winding?

Jon,

The machine is a Sherline 5400, 20TPI lead screws direct drive. The current
reliable top speed is 13.4 IPM. The motors are 80oz/in Pacific Scientific
motors, rated at .52 amps and IIRC 5.47 volts per phase. I suppose I should
be happy with 12 IPM since I only have a maximum of 9 inches to move for X
and even less for Y and Z. I do have a fully functional CNC system with
this machine and I am making nice parts so I really don't have anything to
complain about.

John Guenther
Sterling, Virginia

> -----Original Message-----
> From: elson [mailto:elson]On Behalf Of Jon Elson
> Sent: Friday, April 12, 2002 1:23 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] 8 wire steppers, parallel. series or
> single winding?
>
>
> John Guenther wrote:
>
> > I know this has been addressed before but here goes any way. I
> have some 8
> > wire stepper motors, Pacific Scientific NEMA 23's, and I would
> like to know
> > what configuration will give the highest speed. I am currently
> running them
> > in a parallel configuration which gives plenty of torque but
> seems to limit
> > top speed. Would I get higher speed by running single winding
> per phase at
> > the cost of torque?
>
> It is possible with some motor/driver configurations that you may
> get a little
> higher top speed with the single winding setup. Most won't make that
> much difference, assuming the correct current for each configuration.
> Series, of course, would be a LOT worse.
>
> What is your top speed? What is the motor driving, and with what drive
> arrangement? These motors may just be too small for the load.
>
> Jon
>
>
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