05.91 4 Programming of Motion Blocks
4.2.9 Soft approach to and retraction from the contour
Example: Straight line to a circle
P
A
... Starting point of departure before approaching
the contour
P
S
... Support point: is calculated by the control after
“B” is specified
P
O
... End of the approach block (initial point of the
contour)
B... Approach path without touching contour (is
predefined)
P
E
... Final point having exited contour
R... Calculation of cutting radius
(dotted line: centre point path/TNRC)
R
P
A
P
S
P
E
P
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The address for the approach path is freely selectable
by MD (address B or U).
Example: Approaching a linear contour in a quarter circle (with program example)
Approaching a linear contour in a quarter circle
Y
40
10
70
X
P
A
P
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704020
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P
0
P
1
B
N05 G01 G41 Y10 X20 D . . . F . . . LF (PA)
N10 G247 Y40 X70 B25
L
F
(P
0
)
N15 G01 Y70
L
F
N20 M30
L
F
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
4–31
SINUMERIK 880, (PG)
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