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SP0027

Position Coder Disconnected

Fanuc · AC Spindle Motor Alpha i-Beta i Series Parameters

¿Qué significa SP0027 ?

The position coder (encoder) feedback cable is disconnected or the sensor is faulty. This results in loss of position feedback, making position control impossible.

Causas comunes

  • Position encoder cable is physically disconnected.
  • Encoder signal lines are damaged.
  • The encoder itself has failed.
  • Incorrect encoder type configured in CNC.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check physical connection of the encoder cable at both the motor and the amplifier.

  2. 2

    Measure encoder signal integrity (e.g., A, B, Z pulses) at amplifier terminals.

  3. 3

    Verify encoder resolution and type settings in CNC parameter P4-XX.

  4. 4

    Test encoder output using an oscilloscope if possible.

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Datos técnicos verificados. Última actualización: March 2026

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Fuente: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters