7 Parameters 05.91
7.5 Programming examples with parameters
Example: Machining of internal semicircle
The subroutine below is used for roughing and finishing of a semicircle. The contour radius
and the approach circle radius can be varied by means of parameters. The difference between
the actual and specified workpiece sizes can be checked after each pass. This difference is
then entered as additive tool wear.
% 5873
L
F
N05 . . .
N10 R1=50. R9=10 L11 P1
L
F
(Subroutine call)
N15 . . .
L
F
Subroutine
L11
L
F
N30 R50=R1 – R9
L
F
(Calculation of approach circle)
N35 R51=2·R1
L
F
(Definition of semicircle)
N40 G00 G64 G91 G41 X=–R50 Y=R9 F500 D1
L
F
(Position approach circle)
N45 G03 X=–R9 Y=–R9 U=R9
L
F
(Approach the contour)
N50 X=R51 U=R1
L
F
(Machining)
N55 X=–R9 Y=R9 U=R9
L
F
(Departure from contour)
N60 G00 G40 X=–R50 Y=–R9
L
F
(Positioning)
N65 M17
L
F
(Subroutine end)
Machining of internal semicircle
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N45
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R1
R51
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R50
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D1
7–8 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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