Re: [CAD_CAM_EDM_DRO] What is a 5 Phase stepper?

Do not confuse a 5 wire stepper with a 5 phase stepper. A 5 wire stepper is
a 4 coil stepper with one wire from each coil connected as common internally
and can only be run in unipolar mode. A 5 phase stepper has 5 coils and 10
wires, 2 for each coil. Fujitsu Limited made these and they were used on
some ICON controllers on some of the Wells Indexer machines. I suppose some
one may have made a 5 phase stepper with 6 wires, one for each coil and one
internally connected common but I have never seen one.
Darrell

----- Original Message -----
From: Jon Elson <jmelson@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Wednesday, May 31, 2000 2:26 PM
Subject: Re: [CAD_CAM_EDM_DRO] What is a 5 Phase stepper?


>
>
> Darrell wrote:
>
> > A 5 phase stepper has 5 windings (10 wires) instead of 4 windings.
>
> Actually, the Vexta (Oriental Motor) 5 phase steppers (and nobody else
> makes
> them, I assume due to patent rights) have only 5 wires.
>
> > That
> > means it needs a special driver card.
>
> Very definitely so. The only ones I've ever seen are also from Vexta.
>
> Jon
>
>
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