Siemens Sinumerik 840D sl Programming Manual page 250

Tool radius compensation
11.1 Tool radius compensation (G40, G41, G42, OFFN)
Example 3: Turning
Program code
...
N20 T1 D1
N30 G0 X100 Z20
N40 G42 X20 Z1
N50 G1 Z-20 F0.2
...
250
20
20 1
Comment
; Only tool length compensation is activated.
; X100 Z20 is approached without compensation.
; Radius compensation is activated, point X20/Z1 is
approached with compensation.
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals