Fagor alarm 1033: Wrong gear change.
CNC 8055 CNC error · Fagor 8055/8055i
What it means
A gear change failed either because the MAXGEAR1..MAXGEAR4 machine parameters are misconfigured (unused ranges left at zero rpm instead of duplicating the highest used speed) or because the PLC did not return the corresponding GEAR1-GEAR4 confirmation signal after the exchange. Spindle start is refused.
Likely causes
- unused gear ranges set to 0 rpm in machine parameters
- PLC ladder does not set GEAR1..GEAR4 marks after the mechanical shift
- gear engaged sensor/limit switch faulty so confirmation never arrives
- solenoid or hydraulic shift valve not actuating the gearbox
Need the part urgently?
Send us alarm 1033 with your machine details — typical RFQ turnaround is 24–48h.