"Roger Leone" ) writes:
Tim:

There used to be a website with info on using surplus stepper motors as
precision shaft encoders. I have been doing Google searches without
success. Perhaps someone else will be able to provide a URL. It was
Australian, I believe.

Good luck.

Roger K6XQ



There was an article in "Radio Electronics" (or maybe it had morphed
into "Electronics Now" by that point), I'd say around 1994 or
so. The concept isn't much more than taking the outputs of the stepper
and putting them through comparators to get a binary waveform. But of course,
picking the right stepper is important since you need the fine steps, and I
know when I brought this up before, someone had something to say against
the concept, though I sure can't remember what they felt was wrong
with the concept.

Michael VE2BVW