Siemens Sinumerik 840D sl Programming Manual page 117

Example
Figure 4-19
00001
N010 T0101
N0100 G90 G00 X60.0 C0 Z..
N0200 G12.1
N0201 G42 G01 X20.0 F1000
N0202 C10.0
N0203 G03 X10.0 C20.0 R10.0
N0204 G01 X-20.0
N0205 C-10.0
N0206 G03 X-10.0 C-20.0 I10.0 J0
N0207 G01 X20.0
N0208 C0
N0209 G40 X60.0
N0210 G13.1
N0300 Z..
N0400 X.. C..
N0900 M30
Note
No geo axis interchange (parallel axes with G17 (G18. G19) should be active.
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Example of polar coordinates interpolation
4.5 Polar coordinates interpolation (G12.1, G13.1)
;TRANSMIT selection
;TRANSMIT deselection
Additional functions
117