Encoders are sensors that capture and convert physical quantities such as displacement, Angle, velocity, etc., to generate a series of digital pulses or codes that accurately reflect the motion state of the measured object. According to the working principle, encoders are mainly divided into two categories: incremental and absolute. Incremental encoders output pulse signals by detecting periodic changes in the grating or magnetic gate on the rotation axis, generating a fixed number of pulses per rotation for calculating speed and displacement. Absolute encoders, on the other hand, have a unique code at each position, and even if the power is off and restarted, they can immediately know the current position without recalibration.

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