Siemens SINUMERIK 840D sl Programming Manual page 178

Geometry settings
8.3 Dimensions
Example
Changeover between inch system and metric system
The parameterized basic system is metric:
MD10240 $MN_SCALING_SYSTEM_IS_METRIC = TRUE
Program code
N10 G0 G90 X20 Y30 Z2 S2000 M3 T1
N20 G1 Z-5 F500
N30 X90
N40 G70 X2.75 Y3.22
N50 X1.18 Y3.54
N60 G71 X20 Y30
N70 G0 Z2
N80 M30
178
Comment
; X=20 mm, Y=30 mm, Z=2 mm,
F=rapid traverse mm/min
; Z=-5 mm, F=500 mm/min
; X=90 mm
; Prog. meas. system: inch
X=2.75 inch, Y=3.22 inch, F=500 mm/min
; X=1.18 inch, Y=3.54 inch, F=500 mm/min
; Prog. meas. system: metric
X=20 mm, Y=30 mm, F=500 mm/min
; Z=2 mm, F=rapid traverse mm/min
; End of program
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals