On Wed, 26 Jun 2002 09:59:08 -0700, Harold M Hallikainen wrote:

>        Quadrature encoders. Just wrote some PIC code to read one.
>        The one we used in this project has detent so it "clicks" from =
position
>to position. When in one of its stable positions, both sets of contacts
>are open, so you can connect multiple encoders in parallel and adjust =
any
>one of them and have the PIC read it fine.=20

Paralleling encoders will work fine as long as you're *guaranteed* to
be in a detent when you stop moving either encoder.=20

Watch out, though, when one of the encoders is stopped between
detents. If they're wired directly in parallel, you won't be able to
read one correctly while the other one is off of a detent position.

Most encoders that I've seen can be moved in such a way (either
deliberately or accidentally) as to end up between detents.


Regards, Bob

And yes, I once got burned on something very similar to this. :=3D)

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