Owner's manual

Cutter Diameter Compensation
(G40, G41, G42)
Chapter 21
21-3
Figure 21.2
Definition of Inside and Outside
workpiece
Inside angle (less than 180 degrees)
Outside angle (greater than 180 degrees)
workpiece
Use these G-codes for cutter compensation:
G41 -- cutter compensation, left
G42 -- cutter compensation, right
G40 -- cutter compensation, cancel
Left or right is defined as offsetting the tool to the left or right of the
programmed cutting path when facing the direction of cutter motion.
Important: If a negative value is set in the offset tables as the tool radius,
compensation direction (tool left or right) is reversed for G41 and G42.
G41 a nd G42 are also reversed during the mirroring operation
(see chapter 14).
All of these G-codes are modal a nd belong to the same modal group.
Figure 21.3
Cutter Compensation Direction
Cutting tool
Entry move
G40 (no compensation)
G41 (compensation to left)
G
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2
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21.1
Active Cutter Compensation