Okuma Alarm-A 1848 Chuck grip failure
The chuck failed in gripping when closed or a spindle rotation command was issued with nothing gripped by the closed chuck.
Object
Spindle
Probable Faulty Locations
1) A chucking error
2) The chuck close limit switch is maladjusted.
3) The chuck close limit switch is faulty.
Measures to Take
1) Try to chuck again.
2) Adjust the chuck close limit switch.
3) Check the chuck close limit switch performance.