Okuma Alarm-B 2571 W-axis position no spec.
G154 was specified thought the machine was not equipped with B-axis control function, two saddles, and sub spindle.
Concerning Sub spindle-tailstock Control specification, it instructed with the instruction prohibited.
Probable Faulty Locations
Measures to Take
Specify G154 command only when the machine is equipped with B-axis control function, two saddles and a sub spindle.