Quote Originally Posted by jittechnologies View Post
DON'T MOVE THE "ENCODER". If you do, it could cost you more than it's worth to have it realigned, for proper commutation.

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Simple to do, but you need a double beam 'scope in order to align it easily.
I have added a few to motors that either had failed or didn't have one in the first place.
I replaced a few on Fanuc motors, which have a odd-ball, proprietary method.