Smooth Approach And Retraction; Approach And Retraction (G140 To G143, G147, G148, G247, G248, G347, G348, G340, G341, Disr, Discl, Fad, Pm, Pr) - Siemens SINUMERIK 840D sl Programming Manual

Tool radius compensation

10.4 Smooth approach and retraction

10.4 Smooth approach and retraction
10.4.1 Approach and retraction (G140 to G143, G147, G148, G247, G248, G347, G348,
G340, G341, DISR, DISCL, FAD, PM, PR)
Function
The SAR (Smooth Approach and Retraction) function is used to achieve a tangential
approach to the start point of a contour, regardless of the position of the start point.
This function is used preferably in conjunction with the tool radius compensation, but this is
not mandatory.
The approach and retraction movement consists of a maximum of four 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.
Syntax
G140
G141 to G143
G147, G148
G247, G248
G347, G348
G340, G341
DISR=..., DISCL=..., FAD=...
298
, P and P
1 2
4
, P and P are always defined. Intermediate points P
0 3 4
0
3
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
and P can be omitted,
1 2
Fundamentals