System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
Circular Interpolation
DATA TO BE GIVEN COMMAND MEANING
G17 Specify arc on XY plane
G18 Specify arc on ZX plane
1 Plane selection
G19 Specify arc on YZ plane
G02 Clockwise (CW) 2 Direction of rotation
G03 Counterclockwise (CCW)
G90
mode
One, Two, or Three of
X, Y, and Z
End point position in work
coordinate system
3 End point
position
G91
mode
One, Two, or Three of
X, Y, and Z
Distance from start point to end
point
Distance from start point
to center
Two of I, J, and K The signed distance from start
point to center R=√ (I
2
+J
2
)
R Arc radius (if no center is
specified a center is calculated
from the start point and end
point)
(-R is the longer arc)
4
Arc radius
Two of XC, YC, ZC The signed absolute coordinates
of the arc center
Polar Definition
DATA TO BE GIVEN COMMAND MEANING
Arc radius R Arc radius 5
Start angle AA Angle from center to start
6 End angle AB Angle from center to end point
CW direction
7 Feedrate F Velocity along arc
8 To line W, C Angle
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