Siemens sinumerik 808d Programming And Operating Manual page 76

Programming principles
1.6 Tool and tool offset
Figure 1-40
Center hole
Switch to G17 for application of a center hole. This makes the length compensation take
effect for the drill in the Z axis. After drilling, the normal compensation for turning tools takes
effect again with G18.
Programming example
N10 T3 D1
N20 G17 G1 F1 Z0 M3 S100
N30 Z-15
N40 G18 M30
Figure 1-41
76
Effect of the compensation for the drill
Application of a center hole
;Drill
; Tool length offset effective in Z axis
; Drilling terminated
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0