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G40, G41, G42: Cutter Compensation

Last modified by writer on 2022/09/01 01:25

G40 – turn cutter compensation off.

The command to disable compensation for tool diameter should be followed by linear movement with a value greater than the tool diameter. Duplication of the command cannot cause a control program error.

Error
It is an error if:
  • the code is followed by a circular movement (G2/G3);
  • linear displacement (G0/G1) after switching off the compensation is less than the diameter of the tool.

G41 T- – enable compensation mode to the left of the programmed path.
G42 T- – enable compensation mode to the right of the programmed path.

G41/G42 are set with a parameter whose value is the tool number from the corresponding table. When a command is called, the control program changes the path, moving it to the right (G42) or to the left (G41) from the original one.

G41 example:

M6 T26 (command tool change to tool No. 26)​​​​​​​
G0 X-10 Y-10 Z0 (rapig linear interpolation)​​​​​​​
G41 (enable compensation on the left)​​​​​​​
G0 X0 Y0 (fast linear movement)​​​​​​​
G1 Z0 (feed linear interpolation)​​​​​​​
G1 Y50
G1 X50 Y0
G1 X0
G40 (off compensation mode)
G0 X-10 Y-10

Error
It is an error if:
  • if the YZ work plane is active (more...);
  • the tool with the specified number was not added to the “Tool Table”;
  • tool diameter compensation has been included previously.