The working principle of absolute encoder！

    There are several radially concentric circular code channel encoder, the number of sectors adjacent code channel is double the number of tracks the relationship between code, the code on the disc is its digital binary digits.
    Absolute encoder position of each axis to provide a unique value for the digital encoding.
    When a power failure, the absolute position of the encoder is not lost.
1) absolute encoder, in its circular code wheel has a plurality of radially concentric code channels, each track by the translucent and opaque sector phase composition, the number of sectors adjacent code is a two-channel fold relationship, number of tracks on the code disc  code is its digital binary digits on one side of the disc is the source code, on the other side corresponding to each code channel having a photosensitive member; when the encoder is in a different location each photosensitive whether or not converted by the light element according to the corresponding level signal to form a binary number. This is not characteristic of the encoder counter at any position on the reels can be read with a fixed position corresponding to the digital code. Obviously, the more code channel, the higher the resolution, for having an N-bit resolution encoder, the encoder must have a bar code N channel.
2) It has an absolute zero-bit code, when a power failure or shutdown, and then re-boot measurement, you can still read correctly outage or shutdown position code and find exactly zero code.
3) When the absolute encoder shaft rotates, there is a position corresponding to the code (binary, BCD code, etc.) output. Code from large and small changes, you can distinguish positive and negative directions and the location of displacement, without sentenced to circuit.
4) Gray code changes each time only one.
5) rotary encoder Gray code is a cyclic code, its highest position and the lowest position to follow the same only change a law.

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