How do I fix and clear Mazak alarm 721?

Correct the starting-point data, ending-point data, or radius data of the arc.

CRITICALAlarm code

721

ILLEGAL RADIUS (WNo., UNo., SNo.)

Q: What does Mazak alarm 721 mean?

Mazak alarm 721 is "ILLEGAL RADIUS (WNo., UNo., SNo.)". Arc-drawing data you have specified is illegal. That is, the relationship between the starting point, ending point, and radius of the arc is incorrect. It is impossible to define an arc. Error type: Registered Data — program or tool data error.

What it means

Arc-drawing data you have specified is illegal. That is, the relationship between the starting point, ending point, and radius of the arc is incorrect. It is impossible to define an arc.

What to do

1Correct the starting-point data, ending-point data, or radius data of the arc.

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 →