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FANUC Controller
Program/G-code · Intermediate · 5-30 minutes
Fanuc 195 - Contour control illegal plane
Alarm 195 occurs when contour control (G40/G41/G42) is attempted in an improperly defined or illegal plane, or when the plane specification conflicts with the cutter compensation command. This typically happens when trying to apply cutter radius compensation without a valid G17/G18/G19 plane selection, or when switching planes while compensation is active.
195
Fanuc 195 - Contour control illegal plane
CONTOUR CONTROL ILLEGAL PLANE
Fanuc PS program alarm 195: CONTOUR CONTROL ILLEGAL PLANE. This alarm is triggered by an illegal or incorrectly formatted command in the part program, or a programming condition that the Fanuc control cannot execute.
Root Cause Summary
Alarm 195 occurs when contour control (G40/G41/G42) is attempted in an improperly defined or illegal plane, or when the plane specification conflicts with the cutter compensation command. This typically happens when trying to apply cutter radius compensation without a valid G17/G18/G19 plane selection, or when switching planes while compensation is active.
Safety
- Verify corrected program or parameters before resuming machining
Causes and Fixes
- 1
Review the program at the line where the alarm occurred and identify the G41/G42 command.
- 2
Check if G17 (XY plane), G18 (ZX plane), or G19 (YZ plane) is programmed before the cutter compensation command.
- 3
Insert the appropriate plane selection command (G17, G18, or G19) before the G41/G42 line in the program.
- 4
Reset the alarm, return to program start or the affected block, and re-execute the program to verify the fix.
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