# Fanuc Series 15i/150i-MA (Programming) Operators Manual 4.INTERPOLATION FUNCIONS PROGRAMMING B-63324EN/03
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4.12.1 Involute Interpolation with a Linear Axis and Rotation Axis
(G02.2,G03.3)
In the polar coordinate interpolation mode, an involute curve can be
machined using involute interpolation. The involute curve to be
machined is drawn in the plane of the linear axis and rotation axis.
Format
Explanation
- Center of the base circle
The center of the base circle of an involute curve, as viewed from the
start point, is determined depending on the axis in the basic coordinate
system that is used as the first axis of the plane.
- When the linear axis is the X-axis or an axis parallel to the X-axis,
the Xp-Yp plane is assumed, and the center is specified using I
and J.
- When the linear axis is the Y-axis or an axis parallel to the Y-axis,
the Yp-Zp plane is assumed, and the center is specified using J and
K.
When the linear axis is the X-axis or an axis parallel
to the X-axis
G02.2
X_C_ I_J_R_F_ ;
G03.2
When the linear axis is the Y-axis or an axis parallel
to the Y-axis
G02.2
Y_C_ J_K_R_F_ ;
G03.2
When the linear axis is the Z-axis or an axis parallel
to the Z-axis
G02.2
Z_C_ K_I_R_F_ ;
G03.2
G02.2 : Clockwise involute interpolation
G03.2 : Counterclockwise involute interpolation
Example) When the linear axis is the X-axis
X,C : End point linear axis coordinate of the involute
curve, rotation axis
I,J : Center position of the base circle of the involute
curve viewed from the start point
R : Radius of the base circle
F : Cutting feedrate 