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ErrorLib — Industrial Fault Code Library

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SP9077

MISSMATCH THE RESULTS OF AXIS NUMBER CHECK

Fanuc · Alpha i Series Servo Amplifier

What does SP9077 mean?

The spindle detected a mismatch between the CNC result of the axis number check and the spindle's own result. This indicates a configuration inconsistency regarding axis numbering between the CNC and spindle, which can lead to incorrect axis control.

Common Causes

  • The number of axes reported by a component does not match the expected count.
  • Mismatch in axis configuration between the main controller and an expansion module.
  • Faulty axis detection circuit.
  • Incorrect addressing of axis modules.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the SPM control printed-circuit board.

Browse all codes in this manual (101)
Verified technical data. Last updated: April 2026

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 126)Search more codes in this manual