How do I fix and clear Mazak alarm 139?

Hardware trouble is likely. Contact the nearest Mazak Technical Center or Technology Center. Clearing procedure: Power OFF → fix cause → Power ON.

ALARMSMazatrol Assistant

CRITICALAlarm code

139

PRE-INTERP ACCEL/DECEL ERROR

Q: What does Mazak alarm 139 mean?

Mazak alarm 139 is "PRE-INTERP ACCEL/DECEL ERROR". An abnormality has occurred in the NC unit during the pre-interpolation acceleration/deceleration process. Error type: Operation — wrong key or incorrect operation. Machine state: Feed hold — feed stopped, machine ready.

What it means

An abnormality has occurred in the NC unit during the pre-interpolation acceleration/deceleration process.

What to do

1Hardware trouble is likely.
2Contact the nearest Mazak Technical Center or Technology Center.

Codebook — decoded

AError typeOperation — wrong key or incorrect operation

KStop statusFeed hold — feed stopped, machine ready

MClearingPower OFF → fix cause → Power ON

Still faulted after these steps? Do not restart under load — ask the Mazatrol assistant.

Still stuck? Ask the Mazatrol assistant →