Okuma Alarm-A 8618 M spindle overload
The M spindle load detection meter relay has been turned on due to overload.
Probable Faulty Locations
1)Cutting under overload condition.
2)Setting error of the M spindle load detection mater relay.
3)Error in setting the startup current immune period which is set at the “M Spindle overload time” [M Spindle] machine user parameter.