Siemens SINUMERIK 880 Programming Manual page 142

7 Parameters
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.
L F
% 5873
N05 . . .
N10 R1=50. R9=10 L11 P1
L F
N15 . . .
Subroutine
L11 L F
L F
N30 R50=R1 – R9
L F
N35 R51=2·R1
N40 G00 G64 G91 G41 X=–R50 Y=R9 F500 D1
N45 G03 X=–R9 Y=–R9 U=R9
L F
N50 X=R51 U=R1
N55 X=–R9 Y=R9 U=R9
N60 G00 G40 X=–R50 Y=–R9
L F
N65 M17
Y
Machining of internal semicircle
7–8
L F
L F
L F
L F
N45
N60
N40
R9
R50
D1
R1
N50
R51
© Siemens AG 1991 All Rights Reserved
(Subroutine call)
(Calculation of approach circle)
(Definition of semicircle)
L F
(Position approach circle)
(Approach the contour)
(Machining)
(Departure from contour)
(Positioning)
(Subroutine end)
N55
SINUMERIK 880, (PG)
05.91
X
6ZB5 410-0HD02