G41 2D Cutter Compensation Left / G42 2D Cutter Comp. Right (Group 07)
G41 will select cutter compensation left; that is, the tool is moved to the left of the programmed path to compensate for the size of the tool. A D address must be programmed to select the correct tool radius or diameter offset. If the value in the selected offset is negative, cutter compensation will operate as though G42 (Cutter Comp Right.) was specified.
The right or left side of the programmed path is determined by looking at the tool as it moves away. If the tool needs to be on the left of the programmed path as it moves away, use G41. If it needs to be on the right of the programmed path as it moves away, use G42. Refer to the “Cutter Compensation” section for more information.
G41 2D Cutter Compensation Left / G42 2D Cutter Comp. Right