Siemens SINUMERIK 840DE Programming Manual page 143

Parameters
G2
G3
X Y Z
I J K
AR
TURN=
AP=
RP=
Note
G2 and G3 are modal.
The circular movement is performed on the axes specified by the working plane.
Example
N10 G17 G0 X27.5 Y32.99 Z3
N20 G1 Z-5 F50
N30 G3 X20 Y5 Z-20 I=AC(20)
J=AC (20) TURN=2
N40 M30
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
4.12 Helical interpolation (G2/G3, TURN=)
Travel on a circular path in clockwise direction
Travel on a circular path in counterclockwise direction
End point in Cartesian coordinates
Circle center point in Cartesian coordinates
Aperture angle
Number of additional circle passes within the range 0 to
999
Polar angle
Polar radius
;Approach start position
;Tool infeed
;Helix with following parameters: Execute
;2 full circles from start position,
;then approach end point
;End of program
Programming Motion Commands
4-37