3506

Invalid Machining Area

Fanuc · Series 0i Manual Guide

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.

Common Causes

  • The specified region for material removal is improperly defined.
  • Overlap or gaps in the programmed machining boundary.
  • Attempting to machine a feature that is not constructible.
  • Collision alert triggered by the programmed machining area.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Modify the machining program to specify a correct machining area, ensuring valid part figure and blank figure definitions within the machining profile.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Fanuc Series 0i Manual Guide