Absolute encoder (rotary)！

Absolute encoder (rotary)
There are many passages dynasty reticle absolute encoder optical encoder, each groove successively with 2-wire, 4-wire, 8-wire, 16 wire ...... choreography, so that in each position encoder by reading each channel scribing through the dark, get a group from the n-1 th power of the unique binary code (Gray code) to 2 2 to the zero power, which is called n-bit absolute encoder. Such encoders are mechanically position the photoelectric encoder of the decision, it is not a power outage, the impact of interference.
Each absolute position encoders determined by the mechanical position is unique, it requires no memory, no need to find a reference point, and would not have to count, when you need to know where and when to go read its position. Thus, interference encoder properties, has greatly enhanced the reliability of the data.
From a single-turn absolute encoder to a multi-turn absolute encoder
Rotary single-turn absolute encoder to measure the rotation of each channel optical encoder engraved lines to obtain a unique code, when rotated more than 360 degrees, the encoding back to square one, which does not comply with the principle of an absolute encoder only, so code can only be used within the measuring range of rotation of 360 degrees, known as single-turn absolute encoder.
If you want to measure more than 360 degrees of rotation, it is necessary to use multi-turn absolute encoder

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