Siemens SINUMERIK 840DE Programming Manual page 339

The function is mainly used in conjunction with the tool radius offset, but is not mandatory.
The approach and retraction motion consists of a maximum of 4 sub-movements:
• Start point of the movement P
• Intermediate points P
• End point P
Points P
according to the parameters defined and the geometrical conditions.
Programming
G140
Or
G141 to G143
Or
G147, G148
Or
G247, G248
Or
G347, G348
Or
G340, G341
Or
DISR=..., DISCL=..., FAD=...
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
, P und P
1 2
4
, P und P are always defined. Intermediate points P
0 3 4
8.11 Smooth approach and retraction
0
3
Tool offsets
and P can be omitted,
1 2
8-43