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
Set a positive value for the flexible feed gear denominator.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series Servo Amplifier