Absolute encoder ！

Absolute encoder detection means is a direct coding and direct measurement. It indicates the absolute value of the position, no cumulative error, the power is cut, the location information is not lost. Most encoder encoding disc and code rail, collectively known as code disk. From the use of the encoder count to classification, binary code, binary cyclic code (gray code), di - decimal codes encoder. From a structural principle of classification, contact, optical and electromagnetic several.
     Hybrid absolute encoder is to make incremental and absolute code system code to do the same on a code disk. The disc is a high density of the outermost incremental stripes, the middle four yards absolute track consisting of four gray code, every 1/4 Gray code is divided concentrically into 16 equi-segmentation. The working principle of the code wheel is a three-pole count: coarse, medium and fine count. The number of revolutions of the code wheel turn represented by "one revolution pulse" of the count. Within one rotation angle Location 4 * 16 different values gray code representation. 1/4 circle gray code every segment of the most outer incremental code completion.

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