Re: [CAD_CAM_EDM_DRO] Stepper motors as encoders

hi
ur idea is good. write a circuit diagram . i think it is very weel for dro.
i also working on it now.
thanks

shabbir


At 09:25 PM 8/18/01 +0000, you wrote:

>I am thinking of playing with stepper motors as shaft encoders. Has
>anyone had any luck with this approach?
>
>In practical terms, 100 pulses per revolution is the best resolution
>which would be available. The main virtue of this approach would be
>low cost, since .9 degree/steppers (which give only 100 ppr) seems to
>be the smallest step size widely available from surplus sources, where
>they are available in the $2 range. The electronics to interface a
>stepper so it outputs 5V pulses is cheap - 2 comparators, and a few
>R's, C's and diodes, plus a 5V power supply.
>
>Any comments? Would 100 ppr have any value with DRO's? Of course
>greater resolution could be achieved mechanically.
>
>Grant
>
>
>
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