Cycles
2.4 Drilling cycles
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
109
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Figure 2-1 Geometrical parameters
2.4.2 Requirements
Call and return conditions
Drilling cycles are programmed independently of the actual axis names. The drilling position
must be approached in the higher-level program before the cycle is called.
The required values for feedrate, spindle speed and direction of spindle rotation must be
programmed in the part program if there are no defining parameters in the drilling cycle.
The G functions and the current data record active before the cycle was called remain active
beyond the cycle.
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.
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