Okuma Alarm-A 1761 Revolution tool gear mismatch
Mismatch between the gear range command and the position of gear range setting limit switches occurs while the M-tool spindle is rotating.
Probable Faulty Locations
1)Faulty EC input signals
I/O check NO.29 INPUT bit 9 (iMA242)—M242
2)Error in adjustments of gear match confirmation limit switch
Measures to Take
Check the related EC input signals.