Approach And Retraction With Enhanced Retraction Strategies (G460, G461, G462) - Siemens SINUMERIK 840D sl Programming Manual

Reading positions
Points P
• $P_APR: reading P
• $P_AEP: reading P
• $P_APDV: read whether $P_APR and $P_AEP contain valid data
10.4.2

Approach and retraction with enhanced retraction strategies (G460, G461, G462)

Function
In certain special geometrical situations, special extended approach and retraction strategies,
compared with the previous implementation with activated collision detection for the approach
and retraction block, are required in order to activate or deactivate tool radius compensation.
A collision detection can result, for example, in a section of the contour not being completely
machined, see following figure:
Figure 10-3
Syntax
G460
G461
G462
Fundamentals
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
and P can be read in the WCS as a system variable during approach.
3 4
(initial point)
3
(contour starting point)
4
Retraction behavior with G460
Tool radius compensation
10.4 Smooth approach and retraction
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