Re: Powermax II voltage rating? (additional info)

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Greg Nuspel" <nuspel@t...> wrote:

> If the chart rates the motor at 3.3A @ 0.76R would the voltage be
> 3.3x0.76=2.508V ?
> --Greg Nuspel
>
> http://www.ckua.com Radio for the adventurous.
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Greg,

If you are going to use the Geckos then you will be driving the steppers in bipolar
mode, either series or parallel to get maximum torque. The voltages are calculated as
you have stated above in unipolar mode.

Bipolar parallel 4.6x.38=1.748V 214oz-in holding torque
Bipolar series 2.3x1.52=3.496V 214oz-in holding torque
Unipolar 3.3x.76=2.508V 151oz-in holding torque

I have just completed a HF mini-mill CNC conversion using the powermax II P22
motors in parallel 6.5x.21=1.365V 230oz-in torque. I am using a 24Vdc power
supply and direct driving the lead screws by TurboCNC through Gecko 201s and
everything works great.

Rob