Cutter Radius Compensation (G40, G41, G42) - Siemens Sinumerik 840D sl Programming Manual

Tool length compensation in several axes
Tool length compensation can also be activated for several axes. A display of the resulting
tool length compensation is not possible any more in that case.
3.4.3

Cutter radius compensation (G40, G41, G42)

In cutter radius compensation, the programmed tool paths are shifted automatically by the
radius of the cutting tool used. The path to be corrected (radius of the cutting tool) can be
stored in the tool offset data memory using the NC operator panel. The tool offsets can also
be overwritten with the G10 command in the part program; G10 cannot be used to create
new tools.
The tool offset data in the program is called by specifying the number of the tool offset data
memory with a D function.
Commands
The cutter radius compensation is called with the following G functions.
Table 3- 10
G function
G40
G41
G42
The tool radius compensation is called by executing G41 or G42 and deselected through
G40. The offset direction is determined through the specified G function (G41, G42) and the
offset amount is determined through the D function.
Figure 3-12
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
G functions for calling the cutter radius compensation
Function
Deselection of the tool radius
compensation
Tool radius compensation (tool works in
machining direction to the left of the
contour)
Tool radius compensation (tool works in
machining direction to the right of the
contour)
Cutter radius compensation
Motion commands
3.4 Tool offset functions
G group
07
07
07
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