A rotary encoder is an electromechanical transducer that converts shaft angular position or velocity into digital pulses or absolute position codes. Incremental encoders output A/B quadrature pulses enabling direction and relative position measurement; absolute encoders output a unique binary code at every shaft position. Used ubiquitously in robot joints, servo motors, and motion-control systems for precise closed-loop feedback.
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Rotary Encoder — content pending enrichment.