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C8

Spindle Synchronization Position Error

Fanuc · Series 30i/31i/32i-MODEL B Plus

Was bedeutet C8 ?

This alarm indicates that the spindle motor's position error has exceeded an acceptable threshold during spindle synchronization. This can be triggered by specific sequence timing issues when motor excitation is off, by motor overload during cutting, or by an incorrectly set alarm detection level (parameter No. 4516).

Häufige Ursachen

  • Spindle motor accelerated to eliminate accumulated position error while motor excitation (SFR, SRV) is off.
  • Overload during cutting operation.
  • Inappropriate alarm detection level setting (parameter No. 4516).

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Modify the sequence so that motor excitation (SFR, SRV) is turned off only after spindle synchronization is released.

  2. 2

    Review the cutting conditions to prevent overload.

  3. 3

    Review the alarm detection level setting (parameter No. 4516) to ensure it is appropriate for the application.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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Quelle: Fanuc Series 30i/31i/32i-MODEL B Plus