The absolute principle of the absolute encoder is photoelectric conversion, but its output is digital, there are a number of concentric code channels on the encoder of the absolute encoder, each of which is crossed by light and opaque segments The number of code channels is the number of binary digits of the code disc, the two sides of the code are the light source and the photosensitive element respectively. The difference of the position of the code disc will cause the photosensitive element to be different in light and then the output binary number is different, Binary number to determine the code disk position encoder.
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