Fanuc alarm 50: Spindle synchronization calculation value excessive
αi SPM · Fanuc αi SPM
What it means
In synchronous (multi-spindle) control, a value obtained by internal calculation on the αi SPM exceeded the permissible range. Nearly always a gear-ratio or position-gain parameter problem in synchronization mode.
Likely causes
- Gear ratio parameter setting error (No. 4056–4059)
- Position gain in spindle synchronization too low (No. 4065–4068)
Need the part urgently?
Send us alarm 50 with your machine details — typical RFQ turnaround is 24–48h.