3503
Machining Area Unavailable (Tool Too Large)
Fanuc · Series 0i Manual Guide
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.
Common Causes
- Tool holder or spindle attachment interferes with the workpiece or fixture.
- Machining program designed for a different tool size or type.
- Incorrect tool length or radius offset entered (e.g., P10-02).
- Collision detection system has identified a potential conflict.
Repair Steps & Checklist
Click steps to track your progress.
- 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
Related Faults
Source: Fanuc Series 0i Manual Guide