11 Programming of Cycles 05.91
11.10 NC-specific functions
Results of intersection calculations with @711
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X
5)
1)2)3)4)
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Z
N20
N15
N5
N10
100
150
1) Intersection not found
2) Intersection found
3) Circular arc extends beyond the quadrant boundary(!):
Intersection not found
4) Search path was too short:
Intersection found nonetheless
5) Wrong direction of search:
Intersection found nonetheless
Together with the direction of search, a path is defined along which the intersection is ex-
pected. An intersection is always found when this path or its extension encounters the contour
stored in R
n
to (R
n
+6). An interface is found even if the path programmed after @ 711 points
in the wrong direction or is too short.
The function @ 711 now enters the value 0 into register R
m
if no intersection has been found,
or the value 1 if the search was successful. If an intersection has been found, the parameters
(R
m
+1) and (R
m
+2) contain the intersection coordinates, otherwise the value 0. If a traverse
movement is to be programmed with the values from (R
m
+1) and (R
m
+2), it is necessary first
of all to enquire in a loop whether an intersection has been found or not.
11–46
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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