Encoder codewheel slipping on CIMple shaft

[billbo911]

Originally Posted by Alan Anderson

Sometimes the manufacturing tolerances conspire to make the disks very loose. I've also encountered problems in the other direction before, where the encoder disk wouldn't fit without applying uncomfortably high pressure.

A few years ago I think there was a semi-official document from AndyMark showing how to use a pair of pliers to carefully squeeze the plastic and make it fit a bit more snugly.

I found this statement on AndyMark today after reading your suggestion.

Installation tip
If the encoder wheel slides loosely onto the 1/4" shaft, then follow this procedure to make the inside diameter of the encoder wheel collet to be slightly smaller:

Use a medium-sized pair of pliars and gently squeeze the collet portion of the encoder wheel. This is the longer protruding part of the encoder wheel with the parallel slits in the body. If you gently squeeze the sides together, equally, in 2 or 3 different locations, you can make the inside diameter of the encoder wheel slightly smaller. Then, the wheel will fit on the new shaft.