Siemens Sinumerik 840D sl Programming Manual page 21

● Circular interpolation in the Yβ plane
● If the address characters for the 4th and 5th axes are omitted - such as in the commands
Direction of rotation
The direction of rotation of the circular arc is to be specified as given in the following figure.
G02
G03
Figure 2-3
End point
The end point can be specified corresponding to the definition with G90 or G91 as absolute
or incremental (not in G Code System A!).
If the specified end point does not lie on the circular arc, the system outputs Alarm 14040
"Error in end point of circle".
Possibilities of programming circular movements
The control system offers two options of programming circular movements.
The circular motion is described by the:
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
G19 G02 (or G03) Y... β... R... (or J... K... ) F... ;
"G17 G02 X... R... (or I... J... ) F... ;", then the X-Y plane is selected automatically as the
interpolation plane. Circular interpolation with the 4th and 5th axes is not possible if these
additional axes are rotary axes.
Direction of rotation of the circular arc
clockwise
counterclockwise
Drive commands
2.1 Interpolation commands
21