3 G/M Codes
3 - 9
Fig. 3-7 G02, G03 Direction
Arc cutting command:
Table 3-3
Top (rear) holder Bottom (front) holder
G02 Clockwise Counter clockwise
G03 Counter clockwise Clockwise
An arc comprises three elements, a start point, and end point and a center (See Fig.
3-8).
a. The start point (S) is the tool coordinates when the G02 and G03 execute.
b. The end point (E) is the coordinates of X (U) and Z (W) in the program
format.
c. The center (C) is defined by I and K values. They are the coordinate difference
between the arc start point and center. This value can be either positive or
negative. Definition of the I and k values are same as the increments (U, W).
The arc feed-rate is defined by F-value.
Fig. 3-8 Arc cutting
d. The arc center can be defined by the radius instead of I and K.
But if the arc angle is between -1° and 1° or 179° and 181°, only I and K can
be used for setting.
Start
End
Center
S
K
I
X
Z
X
Z
X
Z
X
Z
X
Z
Top (rear) holde
Bottom (front) holde
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