Re: [CAD_CAM_EDM_DRO] as simple as 1,2,3...

At 01:32 AM 11/14/00 -0000, you wrote:

>Is there a way to determine encoder line count for those among us who
>happen to be temporarily down on their luck and find themselves scope-
>less? The manufacturer disavows all knowledge. I assume one spins the
>encoder at a known rate, but then what? This unit has A, B, Index,
>~A, ~B, etc pinout.
>

Years ago, in developing a readout system, I bought an accurate rotary
table, the kind you crank with a worm. I spent two weeks trying to figure
out why my counters gave erroneous information. Then I switched to a much
cheaper rotary table with taper pin index points. It gave me an accurate
circle of 360 degrees and there was no problem.

Since you have an index, AND the index with one of the channels, most
people use channel A, then stick a cheap meter on the output of the and and
another one on channel A. Damp the encoder shaft with a cloth loop and a
spring or rubber band. Turn the shaft from one index to the next, counting
the output of the channel you are looking at. I would spend more time on
another method if I had a lot to check, but if you only need to do one or
two, this should work faster.

Ted Robbins