1186

Common Causes

• Actual collision of the axis with the workpiece, chuck, fixture, or tailstock
• Motor encoder feedback error causing false torque/acceleration relation
• NC torque limiter set value too sensitive for the application

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code XXXX = Detected torque, sum of torque data collected for 3.2 ms, +-2^-12 MAXTRQ; code YYYY = Detected acceleration, average torque measured for 3.2 ms, about 0.1 1/min/ms
2. 2Stop and inspect the machine immediately: check the named axis path for a crashed tool, fixture, or workpiece before any reset.
3. 3Read the code: XXXX is the detected torque (sum of torque data collected for 3.2 ms, in units of 2^-12 MAXTRQ) and YYYY is the detected acceleration (average torque over 3.2 ms, about 0.1 1/min/ms); large values confirm a real impact.
4. 4After clearing any physical obstruction, check the tool, holder, and workpiece for damage and requalify the setup before running.
5. 5If no physical collision is found, check the motor encoder feedback on the named axis for noise or looseness that could falsify the torque/acceleration relation.
6. 6If the alarm recurs without a real collision, review the NC torque limiter set value with Okuma service before adjusting it.