What is a shaft encoder

A shaft encoder is a device used to measure the rotation angle of an object.

From the measurement principle, there are: photoelectric type, grating type, magnetoelectric type, self-aligning machine/resolver type.

From the measurement method, there are: absolute type and incremental type.

Currently widely used are: photoelectric absolute encoder, photoelectric incremental encoder, grating absolute encoder, grating incremental encoder, inductive synchronizer, magnetic sensitive incremental encoder, absolute encoder of self-aligning machine Encoder, resolver type absolute encoder, etc.