Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 381)

Axis Motion
Chapter 14
14-5
G02 and G03 establish the circular interpolation mode. In G02 mode, the
cutting tool moves along a clockwise arc; in G03 the tool moves along a
counterclockwise arc. Figure 14.3 shows clockwise and counterclockwise
orientation relative to the positive X, Y, and Z axes.
Figure 14.3
Circular Interpolation Direction
G03
G02
G03
G02
G03
G02
G17 G18 G19
Y X Z
X Z Y
Circular interpolation can be performed in the absolute (G90) or
incremental (G91) mode.
Important: S--Curve Acc/Dec mode is not available with circular
interpolation mode.
A plane must first be established before the control will perform the
correct arc.
The system installer selects a default plane that the control assumes when
power is turned on, E-STOP is reset, or when the control is reset. In order
to change planes, it is necessary to program either G17, G18, or G19. G17,
G18, and G19 are modal and remain in effect until cancelled by each other.
For details on plane selection, see chapter 13.
14.1.3
Circular Interpolation Mode
(G02, G03)