How do I fix and clear Mazak alarm 771?

Change over the LOW TURR setting, or modify the machining unit concerned in the turret selection.

CRITICALAlarm code

771

ILLEGAL LOW TUR COMMON UNIT (WNo., UNo., SNo.)

Q: What does Mazak alarm 771 mean?

Mazak alarm 771 is "ILLEGAL LOW TUR COMMON UNIT (WNo., UNo., SNo.)". A unit of machining with the lower turret (or including a command for its retraction) is created within a program whose common unit declares (under LOW TURR) that the lower turret is “not used”. Error type: Registered Data — program or tool data error.

What it means

A unit of machining with the lower turret (or including a command for its retraction) is created within a program whose common unit declares (under LOW TURR) that the lower turret is “not used”.

What to do

1Change over the LOW TURR setting, or modify the machining unit concerned in the turret selection.

Codebook — decoded

BError typeRegistered Data — program or tool data error

I (L)Stop statusunspecified

O (S)Clearingunspecified

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

Still stuck? Ask the Mazatrol assistant →