An incremental or absolute position sensor on the door operator motor shaft that provides real-time door panel position and velocity feedback to the door controller.
Full Definition
The door encoder enables closed-loop position and speed control of the door motor, allowing the door controller to execute precise velocity profiles — slow at open and closed positions to reduce impact, fast in mid-travel to minimise dwell time. Incremental encoders output quadrature pulse trains; absolute encoders output position value directly. On power-up, the door controller performs a reference (homing) run to establish position zero. Encoder failure causes loss of position control, resulting in door slam or failure to open fully, typically flagged as a fault code on the door control board.
