0853

Flexible Feed Gear Denominator Error

Fanuc · Alpha i Series Servo Amplifier

What does 0853 mean?

This invalid parameter setting alarm occurs when a positive value is not set for the flexible feed gear denominator. A positive value is required for correct operation of the feed gear calculation.

Common Causes

  • The denominator value in the flexible feed gear ratio calculation has exceeded its limit.
  • An unexpected high value was read from a sensor involved in gear ratio determination.
  • Configuration of the flexible feed gear's denominator parameter is incorrect.
  • Mechanical issue causing an abnormally high reading for the gear's denominator.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set a positive value for the flexible feed gear denominator.

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

Related Faults

Source: Fanuc Alpha i Series Servo Amplifier