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Rotary Encoder: Factor to Miscount the Output Pulse

FAQ No. FAQ00986

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What is the factor to miscount the output pulse of the incremental Rotary Encoder?


1. Generation of wrong pulse by noise.

Please reduce the influence of the noise.

Please keep wiring as far away from single piping and the noise source (inverter motor) as possible.

2. Generation of wrong pulse by vibration of installation equipment when single phase (only phase A or phase B) is used.

We recommend combining both phase A and phase B with the addition and subtraction counter because it can cancel the wrong pulse by the phase difference output.

3. Inaccurate transmission of rotation by slipping of transmission system (coupling and belt).

Please defend the mounting procedure of the rotary encoder and notes of the mounting, and confirm whether coupling is correctly mounted or the transmission system doesn't run idle.