Fanuc alarm OT0511: - OVERTRAVEL (PRE-CHECK)
overtravel alarm (OT) · Fanuc 0i-D
What it means
Pre-movement stroke check found the block endpoint beyond the negative travel limit and inhibited the move before it began. Fix the offending block's target coordinates or restore correct offsets/modal state. Because nothing moved, machine position remains valid and reset clears the alarm once the program is corrected.
Likely causes
- Endpoint beyond - limit from program error
- Wrong work offset active for the block
- Radius/diameter or unit mismatch altering target values
Need the part urgently?
Send us alarm OT0511 with your machine details — typical RFQ turnaround is 24–48h.