SP0007

Overspeed

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

What does SP0007 mean?

The spindle motor speed has exceeded the programmed or safe operating limit. This can be caused by incorrect speed commands, parameter settings, or a malfunctioning speed sensor.

Common Causes

  • Incorrect commanded speed value in the program (e.g., G-code error).
  • Tuning parameters for speed control are too aggressive.
  • Spindle encoder feedback is giving erroneous high readings.
  • Internal software error in the CNC's speed control logic.
  • Mechanical issue causing the spindle to freewheel at high speed.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review the program for any excessively high S-codes or rapid speed changes.

  2. 2

    Check parameter P1-02 (velocity gain) and P1-03 (velocity integration time).

  3. 3

    Inspect the spindle encoder for damage and ensure stable mounting.

  4. 4

    Reset the spindle amplifier to factory default speed control parameters.

  5. 5

    Physically verify the spindle stops when commanded to stop.

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Verified technical data. Last updated: March 2026

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