CC limit switch %.1s-
Heidenhain · NC Control
What does 7951 A810 mean?
The permissible negative traverse range for the specified axis was exceeded. This indicates the axis has moved beyond its programmed negative software limit or a physical negative limit switch has been activated.
Common Causes
- Permissible negative traverse range exceeded.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the physical negative limit switch for the affected axis for any damage, obstruction, or incorrect adjustment.
- 2
Verify the setting of parameter MP670 (Negative software limit switch) for the specified axis to ensure it is configured correctly according to the machine's travel limits.
- 3
Inspect the axis position feedback system (encoder) for accuracy and potential errors that could lead to an overshoot.
- 4
Manually jog the axis cautiously in the positive direction to move it off the limit switch, then verify it moves freely without mechanical binding before reaching the negative limit again.