What is the structure and working principle of the robot encoder?！

Photoelectric encoder is a widely used position sensor with a resolution can meet the technical requirements of the robot. This non-contact sensor can be divided into absolute and relative type. As long as power is applied to the former of such a sensor in the electromechanical system, it can be given by the encoder actual linear or rotational position. Thus, the robot joints absolute encoder does not require calibration equipment, as long as a power, the controller will know the actual joint position. The relative encoder can only provide a reference point corresponding to the location information of, so with a relatively encoder robots get real location before, you must first complete the calibration procedure.

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