Fanuc alarm OT0504: + OVERTRAVEL (SOFT 3)
overtravel alarm (OT) · Fanuc 0i-D
What it means
Stored stroke check 3 positive boundary exceeded. Stroke check 3 is typically reserved for special zones such as tool-change envelopes or restricted areas defined by parameters No. 1328/1329. Determine whether the check region is legitimately protecting equipment and correct either the program or the zone definition accordingly.
Likely causes
- Entry into tertiary protected zone (tool changer, fixtures)
- Zone parameters left from previous setup
- Program error near protected equipment
Need the part urgently?
Send us alarm OT0504 with your machine details — typical RFQ turnaround is 24–48h.