Siemens Sinumerik 840D sl Programming Manual page 88

Additional functions
4.1 Program supporting functions
Figure 4-9
Restrictions
Explanations
After the programmed cutting depth is reached for each cutting feedrate Q, the return to the
reference plane R takes place in rapid traverse. The approach motion for a renewed step is
also executed in rapid traverse, around the path (d) that can be set in GUD7 _ZSFR[10]. The
path and the cutting depth for each cutting feedrate Q are traversed with cutting feedrate. Q
is incremental without having to specify signs.
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. X, Y, Z or R is programmed.
Q/R
Always program Q and R in one block with an axis motion, otherwise the programmed
values will not be stored modally.
Deselection
The G functions of Group 01 (G00 to G03) and G83 should not be used together in one
block, as otherwise G83 is deselected.
88
Deep hole drilling cycle with chip removal (G83)
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
ISO Milling