RE: [CAD_CAM_EDM_DRO] Stepper motors and increased Amps

I am not personally familiar with this motor, but let me ask a few more
questions to get a general understanding.
How many wires does the motor have?
In you Bipolar setup (assuming the answer to the above is not 4) are you
hooking up to the whole coil, 1/2 coil, or the 2 - halves of the a single
coil in parallel (only doable on an 8 wire motor)?
Final question, why do you want to up the amperage?

Tim
[Denver, CO]

> Hi Tim,
>
> The motors are Shinnano Kenshi Co.Ltd. STH-55D203-02, 1.8 Deg/Step, 5.1V,
> 1A, 6 wire. I have them wired up in Bipolar mode to Dan Mauch's 5 AMP
> Bipolar Controller cards, currently running 26.5 Volts for the stepper
> motors in 1/2 step mode.
>
> John Guenther
>
> > -----Original Message-----
> > From: Tim Goldstein [mailto:timg@...]
> > Sent: Monday, January 08, 2001 4:58 PM
> > To: CAD_CAM_EDM_DRO@egroups.com
> > Subject: RE: [CAD_CAM_EDM_DRO] Stepper motors and increased Amps
> >
> >
> > From my understanding you will not want to increase the
> amperage. You also
> > have to understand how the ratings are figured. If they are for
> > unipolar and
> > you are using bipolar series you have to lower the amperage by about 40%
> > from the unipolar rating.
> >
> > Please tell us more. How are the motors rated (unipolar or
> > bipolar) and how
> > are you wiring and driving them?
> >
> > Tim
> > [Denver, CO]
> >
> > > -----Original Message-----
> > > Ok, here is my stupid question for the day:
> > >
> > > If I have steppers that are rated at 5.1 volts, 1 Amp can I safely
> > > increase the current to 1.5 Amps without blowing the motor? How much
> > > over the rated current can a stepper motor safely handle?
> > >
> > > Ok, I know, that's two questions not one.
> > >
> > > John Guenther
> > > 'Ye Olde Pen Maker'
> > > FAQ: http://www.ktmarketing.com/faq.html
>