Siemens Sinumerik 840D sl Programming Manual page 60

Motion commands
3.4 Tool offset functions
2. Method B:
Deselection of the compensation mode at an internal angle (smaller than 180°):
Straight line - straight line
Figure 3-14
Circular arc - straight line
Figure 3-15
60
If G40 is programmed in a block without axis motion, the tool radius compensation is
deselected immediately. In other words, that linear interpolation (G00 or G01) must be
active in the block, because the tool radius compensation can be deselected only with a
linear movement. An alarm is triggered if no linear interpolation is active during the
selection of the tool radius compensation.
Deselection of the compensation mode at an internal angle (straight line - straight line)
Deselection of the compensation mode at an internal angle (circular arc - straight line)
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling