3506
Invalid Machining Area
Fanuc · Manual Guide Milling and Turning
What does 3506 mean?
This MC alarm (specific to Series 30i) indicates that the machining area specified in the program is invalid. This issue typically arises from incorrect definitions of the part figure or blank figure within the machining profile, leading to an ambiguous or impossible machining boundary.
Repair Steps
- 1
Modify the machining program to specify a correct machining area, ensuring valid part figure and blank figure definitions within the machining profile.
Verified technical data. Last updated: March 2026
Source: Fanuc Manual Guide Milling and Turning