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Re: encoders
Properly done, they work well. Properly means the optic wheel is clean & undamaged. The shaft the optic wheel is on needs to be concentric & have very little end float. The optic wheel needs to be tight on the shaft & properly positioned. Other encoders that have their own shafts & bearings are easier to set up & use.
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If you don't know what you should hook up then you should read a data sheet
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