Siemens SINUMERIK 808D ADVANCED Programming And Operating Manual page 123

Plane definition
In the case of drilling cycles, it is generally assumed that the current workpiece coordinate system in which the machining
operation is to be performed is to be defined by selecting plane G17 and activating a programmable offset. The drilling axis
is always the axis of this coordinate system which stands vertically to the current plane.
A tool length compensation must be selected before the cycle is called. Its effect is always perpendicular to the selected
plane and remains active even after the end of the cycle.
In turning, the drilling axis is thus the Z axis. Drilling is performed to the end face of the workpiece.
See the following illustration for drilling axis when turning:
Dwell time programming
The parameters for dwell times in the drilling cycles are always assigned to the F word and must therefore be assigned with
values in seconds. Any deviations from this procedure must be expressly stated.
Special features when using drilling cycles on a turning machine
Simple turning machines without driven tools can apply drilling cycles only for drilling on the end face (with Z-axis) in the
turning center. These drilling cycles must always be called in the G17 plane.
See the following example for drilling centering _drilling on turning center without tool:
Turning machines with driven tools can also drill off-center on the end face or on the peripheral surface if the machine setup
permits this.
Programming and Operating Manual (Turning)
123
6FC5398-5DP10-0BA2, 06/2015