How does the encoder work

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1. Absolute encoder type uses natural binary or cyclic binary (Gray code) method for photoelectric conversion. The difference between the absolute encoder and the incremental encoder is the transparent and opaque line pattern on the disc. The absolute encoder can have several codes. According to the code on the read code disc, the absolute zero position of the absolute position can be detected. The code can also be used to remember the power failure location. The coding design can adopt binary code, cyclic code, two's complement code, etc. The measuring range is usually 0-360 degrees.

2. When the shaft of the incremental encoder rotates, there is a corresponding pulse output, and its counting starting point can be set arbitrarily, which can realize multi-turn infinite accumulation and measurement. One rotation of the encoder shaft will output a fixed pulse, and the number of pulses is determined by the number of encoder grating lines. When you need to improve the resolution, you can use the A and B signals with a phase difference of 90 to double the frequency or replace the high-resolution encoder.