1. G Function Description
G90 Two axes of X, Y, End coordinate of arc
End
3
position
Z
G91 Two axes of X, Y, Vector value from start point
Z
to end point
Distance from start Two axes of I, Vector value from start of
point to center of
J, K
4
circle
arc to center of circle
Radius of arc
R
Radius of arc
5 Speed of feed
F
Feedrate along the arc
(feedrate)
Example:
1. G02, G03 direction
Y
G03
G02
X
G03
G02
Y
G03
G02
X
G17
Z
G18
X
G19
2. I, J, K definition:
Y
`
Center
`
I J
Start position
Z
End position`
`
End position
Center
K I
Stast position
Z
`
J K
`
Center
Start position
End position
X
a. arc of X-Y plane
X
b. arc of Z-X plane
Y
c. arc of Y-Z plane
8
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