Re: [CAD_CAM_EDM_DRO] Bipolar stepper driver for unipolar steppers

In a message dated 18-Nov-01 01:55:42 Central Standard Time,
jcamp3@... writes:

> Is this likely to cause any problems such as overheating and can these be
> dealt with eg by reducing the current.
>

So long as "motor's current-rating" is not exceeded, no. Second part of
question, therefore, yes.

HOWEVER! You will be passing the current through BOTH halves of the
windings, thus making the inductance FOUR times as much, thus SLOWING the
possible stepping-rate of the po' motor considerably.

SOME folk just use HALF the windings, using the "+ center-taps" as one of the
"four wires", leaving "one half" disconnected. Seems a "waste of copper" to
me, but if that's whatcha gotta do, do it!

I quit trying to figure out how to "make stuff intended for other things work
for real-world purposes" long ago, and just spend the $ necessary to get what
is BEST for the job! That means 4-wire bipolar steppers and "professionally
made" drivers (Gecko, for example!). Or, Superior Electric's "all-in-one"
boxes with drivers and power-supplies in 'em. Please don't hate me!


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