3503
Machining Area Unavailable (Tool Too Large)
Fanuc · Manual Guide Milling and Turning
What does 3503 mean?
This MC alarm (specific to Series 30i) indicates that no machining area can be utilized. The issue stems from the tool specified in the machining program being too large for the designated machining area, making the operation impossible.
Repair Steps
- 1
Modify the machining program to specify and use a smaller tool that fits within the defined machining area.
Verified technical data. Last updated: March 2026
Source: Fanuc Manual Guide Milling and Turning