Siemens Sinumerik 840D sl Programming Manual page 82

Additional functions
4.1 Program supporting functions
Address Q is a modal value that is stored in fixed cycles. Please ensure that this address is
also used as interface for the cycles G73 and G83!
Explanations
The spindles stops at a fixed spindle position after the bottom of a hole is reached. The tool
is returned opposite the tool tip.
The safety clearance can be specified with GUD _ZSFR[0]. The lift-off path can be specified
with _ZSFI[5].
_ZSFI[5] = 1
_ZSFI[5] = 0 or 2
_ZSFI[5] = 3
_ZSFI[5] = 4
The angle must therefore be specified in GUD7 _ZSFR[2] in such a way that the tool tip
points at the opposite direction after the spindle stop, for the lift-off path.
Restrictions
Changeover of the axes
Before changing over the drilling axis, one must first deselect the fixed cycle.
Drilling
The drilling cycle is executed only if an axis motion, e.g. is programmed with X, Y, Z or R.
82
WARNING
G17
+X
-X
+Y
-Y
G18
+Z
-Z
+X
-X
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
G19
+Y
-Y
+Z
-Z
ISO Milling