How do I fix and clear Mazak alarm 742?

Change the thread height or the setting of parameter TC78.

CRITICALAlarm code

742

ILLEGAL THREAD HEIGHT (WNo., UNo., SNo.)

Q: What does Mazak alarm 742 mean?

Mazak alarm 742 is "ILLEGAL THREAD HEIGHT (WNo., UNo., SNo.)". In the THREAD unit data, the following condition is not satisfied. (Finishing allowance) ≤ (Thread height) Designated in the unit data. Set using parameter TC78. Error type: Registered Data — program or tool data error.

What it means

In the THREAD unit data, the following condition is not satisfied. (Finishing allowance) ≤ (Thread height) Designated in the unit data. Set using parameter TC78.

What to do

1Change the thread height or the setting of parameter TC78.

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 →