SP1976

Spindle Control Software Error (30i Range 1)

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

What does SP1976 mean?

An error occurred with the spindle control software for Series 30i (codes SP1976 to SP1979). This indicates an internal software issue requiring system diagnosis.

Common Causes

  • Internal software error within the spindle control firmware (30i range).
  • Data corruption in the spindle control program memory.
  • Unstable power supply to the spindle control module.
  • Hardware fault on the spindle control board.
  • Incorrect configuration of spindle control parameters.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the entire CNC system to reset the spindle control software.

  2. 2

    Verify that the correct firmware version is installed for the spindle control module.

  3. 3

    Check all power and ground connections to the spindle control board.

  4. 4

    Run the spindle control module's built-in diagnostic tests.

  5. 5

    Reset spindle control parameters to their default values if possible.

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Verified technical data. Last updated: March 2026

Related Faults

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