Re: Running Uniploar motors as Bipolar motors.

Hi,

If an 8-wire motor has a 1A unipolar rating and you have a full step
or half step drive, then:

Use 1A if you are running the motor with a unipolar drive (6 wire)
Use 1A if you are running half-winding bipolar.
Use 1.41A if you are running parallel bipolar.
Use 0.707A if you are running series bipolar.
Use 0.707A if you are running full-winding bipolar.

If you are using a microstep drive and you want optimum smoothness,
then:

Use 1A if you are running half-winding bipolar.
Use 0.500A if you are running full-winding bipolar.

If you are using a microstep drive, you want optimum smoothness and
you have the new "square" motors, then:

Use 1.41A if you are running half-winding bipolar.
Use 0.707A if you are running full-winding bipolar.

Confusing, isn't it?

Mariss

--- In CAD_CAM_EDM_DRO@y..., "j.guenther" <j.guenther@v...> wrote:
> Hi all,
>
> I have some Pacific Scientific 8 wire unipolar motors rated at 5.47
volts at
> .489 amps. I am currently running these at 38 volts 1 amp in a
parallel
> configration on a Bipolar Chopper driver. The motors don't seem to
be
> getting hot, only slightly warm to the touch. Is this current
setting Ok or
> am I asking for trouble?
>
> John Guenther
> 'Ye Olde Pen Maker'
> Sterling, Virginia