
PROGRAMMING
B–63444EN/01
4. INTERPOLATION FUNCTIONS
41
“Clockwise”(G02) and “counterclockwise”(G03) on the Z
p
X
p
plane is
defined when the Z
p
X
p
plane is viewed in the positive–to–negative
direction of the Y
p
axis in the Cartesian coordinate system. See the figure
below.
G02
G03
Xp
Zp
The end point of an arc is specified by address Xp or Zp, and is expressed
as an absolute or incremental value according to G90 or G91. For the
incremental value, the distance of the end point which is viewed from the
start point of the arc is specified.
The arc center is specified by addresses I and K for the Xp and Zp axes,
respectively. The numerical value following I or K, however, is a vector
component in which the arc center is seen from the start point, and is
always specified as an incremental value irrespective of G90 and G91, as
shown below.
I, J, and K must be signed according to the direction.
End point (z,x)
Start
point
Center
x
z
k
i
I0 and K0 can be omitted. When X
p
and Z
p
are omitted (the end point is
the same as the start point) and the center is specified with I and K, a 360°
arc (circle) is specified.
G02I; Command for a circle
If the difference between the radius at the start point and that at the
end point exceeds the value in a parameter (No.3410), an alarm (No.024)
occurs.
Explanations
D Direction of the circular
interpolation
D Distance moved on an
arc
D Distance from the start
point to the center of arc