Fanuc

Abnormal first spindle motor load has been detected.

This alarm is generated if the system does not properly terminate a mode change. The modes include the Cs contouring, spindle positioning, rigid tapping, and spindle control modes. The alarm is activated if the spindle control unit does not respond correctly to the mode change command issued by the NC.

This alarm indicates in the NC that an alarm is generated in the spindle
unit of the system with the serial spindle. The alarm is displayed in form
AL-XX (XX is a number). Refer to 2.3 or 2.4 Alarms displayed on
spindle servo unit .The alarm number XX is the number indicated on
the spindle amplifier. The CNC holds this number and displays on the
screen.

This alarm is generated when the spindle control unit is not ready for starting correctly when the power is turned on in the system with the serial spindle. The four reasons can be considered as follows: 1) An improperly connected optic cable, or the spindle control unit

It is serial communication error while system is executing after power supply on. Following reasons can be considered. 1) Optical cable connection is fault or cable is not connected or cable is cut. 2) MAIN CPU board or option 2 board is fault. 3) Spindle amp. printed board is fault. If this alarm occurs when CNC power supply is turned on or when this alarm can not be cleared even if CNC is reset, turn off the power supply also turn off the power supply in spindle side.

An LSI overflow has occurred for the spindle during rigid tapping.

The positional deviation of the moving spindle has exceeded the set value during rigid tapping.

The positional deviation of the stopped spindle has exceeded the set value during rigid tapping.

Spindle overheat in the spindle fluctuation detection (1) If the cutting load is heavy, relieve the cutting condition. (2) Check whether the cutting tool is share. (3) Another possible cause is a faulty spindle amp.

The fan motor on the top of the cabinet for the control unit is overheated. Check the operation of the fan motor and replace the motor if necessary.