Approach And Retraction With Enhanced Retraction Strategies (G460, G461, G462) - Siemens SINUMERIK 828D 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
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
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
321