15
4.3 Circular Interpolation (G02
，
G03)
Format
：
X_Y_Z_
：
For the absolute value ,it is the end point coordinate values; For the relative value ,it is the
distance tool moving away.
R: Radius (Signed)
I: X-axis distance from the start point to the center of the arc(Signed)
J: Y-axis distance from the start point to the center of the arc(Signed)
K: Z-axis distance from the start point to the center of the arc(Signed)
G17 / G18 / G19 are XY, XZ, YZ plane
Explanation:
1.
Direction of the circular interpolation
In the Cartesian coordinate plane XY, from the positive direction of the Z-axis look XY plane in the negative
direction, clockwise XY plane (G02) and counterclockwise (G03) direction as shown in Figure 4-1:
Fig. 4-1
2.
Distance from the start point to the center of arc
The arc center is specified by address I, J, and K for the X, Y, and Z axes, respectively. The numberical value
following I, J, or K, hoever, is a vector component in which the arc center is seen from the star point, and is
always specified as an incremental value irrespective of G90 and G91, as shown in Figure 4-2. I, J, and K must be
signed according to the direction.
Fig. 4-2
I0, J0, and K0 can be omitted, when X, Y, and Z is omitted (the end point is the same as the start point), and
the center is specified with I, J, and K, a 360 ° arc ( circle) is specified .
3.
Arc radius
