Fanuc alarm OT0509: INTERFERENCE:-
overtravel alarm (OT) · Fanuc 0i-D
What it means
Twin-toolpost interference detected for movement in the minus direction along axis n — the negative-direction counterpart of OT0508. The control halted motion predicted to bring the two turrets into contact. Verify both posts' tool data and recheck program paths where the posts converge.
Likely causes
- Opposing post convergence in minus direction
- Incorrect tool nose/length data inflating predicted envelope
- Interference check parameters misconfigured
Need the part urgently?
Send us alarm OT0509 with your machine details — typical RFQ turnaround is 24–48h.