Re: 8 wire steppers, parallel. series or single winding?

Hi,

Everything else being equal, replacing your .52A/phase motor with a
4.6A/phase one would increase your top speed about 8 times (100 IPM).
That would be with your present drive and power supply.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "j.guenther" <j.guenther@v...> wrote:
> 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@y...
> > 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
> >
> >
> > Addresses:
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