042

Review the NC program at the point of alarm. Check for G45/G46/G47/G48 commands that appear after G41 or G42 without an intervening G40 cancel command.

Insert G40 (cutter compensation cancel) in a safe block before the G45-G48 tool offset command. Ensure G40 is executed in a linear move or as a standalone block depending on part geometry.

Verify that canceling G41/G42 at this point will not cause gouging or incorrect tool path. Review tool path simulation after modification.

If tool offset is necessary, restructure the program sequence: cancel cutter comp with G40, apply tool offset G45-G48, execute required moves, cancel tool offset with G49, then re-apply cutter comp G41/G42 if needed.

Reset alarm using RESET button, rewind program to safe restart point, and execute in single block mode to verify correction before full auto run.

Check the modal status on the CNC control. Navigate to POSITION screen and observe the G-code modal display in the bottom section to confirm if G41 or G42 is currently active.

Add G40 safety line in program initialization block (typically after program number and before first motion). Standard safe startup: G40 G49 G80 G90 ensures all compensation modes are canceled.

For subprograms (M98/M99), verify that G40 is commanded before the M99 return or at the beginning of the calling program after subprogram return to prevent modal carryover.

Execute MDI command G40 to manually cancel cutter compensation if alarm persists, then reset alarm and restart program from appropriate sequence number.

Ensure machine position is safe before MDI execution to avoid unexpected motion.

Review macro program logic where G-code commands are generated through variable substitution (e.g., G#100). Trace variable values at alarm occurrence point using SYSTEM > MACRO > VARIABLE screen to check variable contents.

Add conditional logic to check and cancel cutter compensation before tool offset commands. Use system variables #4003 (G-code modal for compensation group) to read current state: value 41 or 42 indicates active cutter comp requiring G40 first.

Implement G40 and G49 reset commands in macro GOTO branch targets and after WHILE loop exits to ensure clean modal state before subsequent compensation commands are issued.