Re: [CAD_CAM_EDM_DRO] Re: 1/2 winding current selection ?

On Wed, 5 Nov 2003 22:52:51 -0500, you wrote:

>These are 6 wire Vexta PK-268M-02A motors, 400 step per rev, 2 AMP, 2.25 Ohm
>motors. I have tried running them using the full coil connections and they
>do not perform well in my setup. I have now hooked them up using 1/2 coil
>mode, center tap and 1 end connection, for each phase and they work fine.
>My concern is that 2 AMPs may be more than the windings can stand in this
>mode.

Full coil gives twice the inductance and you use approximately half
the current in setting the motor current.

Recommendations are to use full current hooked up as half coil motors,
bipolar drive. The 2 amps is what they would handle in normal current
limited unipolar "wave" or "full step" drive, so that's fine.

Harvey

>
>John Guenther
>'Ye Olde Pen Maker'
>Sterling, Virginia
>