Re: wiring geckos to stepper motors - common wires to where?

No, unipolar is not series. Unipolar uses 6 wires. You have to wire
them either bipolar parallel, or bipolar series. You need to find a
diagram for those motors. Wire them wrong, and you'll kill the geckos.

Gerry

>
> Dave,
>
> Thanks for the link. It looks like I have an 8 wire motor wired in
> Series. My motor use the term Unipolar. I guess Unipolar=Series
> and Bipolar=Parallel??
>
> Thanks,
> Keith Clark
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dave Halliday" <dh@s...>
> wrote:
> >
> > Try this:
> >
> > http://www.geckodrives.com/photos/Step_motor_basics.pdf
> >
> > You want pages 7,8 & 9 although the rest is a very good (and
> necessary)
> > read...
> >
> > Dave
> >
> > > -----Original Message-----
> > > From: Keith Clark [mailto:mail@t...]
> > > Sent: Saturday, January 07, 2006 8:00 PM
> > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > > Subject: [CAD_CAM_EDM_DRO] Re: wiring geckos to stepper
> > > motors - common wires to where?
> > >
> > >
> > > Alan,
> > >
> > > Thanks for the suggestion, but I tried to get to the white
> papers
> > > but the link on the www.geckodrives.com website is not active.
> > >
> > > I realize how the com is connected to the Campbell board from
> the
> > > geckos. There is a step, dir and com between the Gecko and the
> > > Campbell.
> > >
> > > The question I have is about the 8 wires from the motor. 1 wire
> is
> > > for A phase, 1 for A' abd the next 2 are to be connected
> together
> > > and are called common. Then the next 1 is for B phase and the
> next
> > > B'. Then the next 2 are again connected together and labelled
> > > common. That accounts for all 8 wires. I am assuming that the
> wires
> > > connected together are just to be left connected to themselves.
> > > Only the other 4 wires for the 4 phases will connect to the
> Gecko at
> > > A,A',B, and B'. Does that sound correct?
> > >
> > >
> > > Thanks,
> > > Keith Clark
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett
> <KM6VV@a...>
> > > wrote:
> > > >
> > > > Hi Keith,
> > > >
> > > > DON'T connect the common wires together! Check out the "white
> > > papers"
> > > > on the Gecko website.
> > > >
> > > > Alan KM6VV
> > > >
> > > > Keith Clark wrote:
> > > > > I am wiring the gecko drives with stepper motors with 8
> wires.
> > > The
> > > > > unipolar wiring requires connecting 2 wires together and
> these
> > > are
> > > > > labelled common. There is on pair for each phase. Where do
> the
> > > > > common wires from the motor go? I have a common from the
> Gecko
> > > drives
> > > > > for each motor that goes to the Campbell board but I don't
> > > believe
> > > > > that is where the wire from the motor goes. Perhaps these
> wires
> > > > > labelled common just connect together at the motor and do
> not go
> > > > > anywhere else?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Keith Clark
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
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