Re: Switch encoder problems

Mike wrote:

This particular encoder at rest on the detent has both switches open.
When the shaft is rotated to the next detent both switches will close
then open again. That would be a leading and trailing edge for each
switch, so I suppose that would be four edges per detent.

I hooked up a digital scope to the 2 switches and there isn't all that
much bouncing of the edges. It's hard for me to explain, but what is
happening is that when the shaft stops the detent doesn't hold it good
and tight and it's very easy to get a partial rotation out of the
detent position then rocks back to rest. resulting in another switch
transfer. That is when it doesn't go far enough to just stay between
detents with the switches closed. I need to treat them as if they have
no detent and can be in any position at rest.

That sounds like a mechanical issue, are you stuck with this
encoder ?

ie There are different combinations of encoder out there, with
Detent-edge ratios ?

Otherwise, a solution might be to discard some resolution,
for stability. - resolve to full 4 quadrants, but only action
on some count either side, so it's really a SW backlash.
Not as nice to use, but it could tolerate a last-set-click
encoder ?

-jg

.

Relevant Pages

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