
B–63523EN–1/03
6. INTERPOLATION FUNCTION
693
The direction of the compensation command Xa is determined by the
inclination angle q of the angular axis and the direction of the move
command Yp for the orthogonal axis. When tan q is plus, the direction
of the move command for the angular axis is opposite to that of the
compensation command for the orthogonal axis. (For example, if a move
command in the plus direction is specified for an angular axis when the
inclination angle is +30°, a compensation command in the minus
direction is output for the orthogonal axis.)
So, when single direction positioning is performed during angular axis
control, positioning may be performed by a compensation command
along the orthogonal axis in the direction opposite to the direction set in
parameter No. 5440. To prevent this situation from occurring, set the
parameter as described below so that the direction of the compensation
command matches the positioning direction for the orthogonal axis.
Set the directions of single direction positioning (parameter No. 5440) for
the angular axis and orthogonal axis so that the directions for the angular
axis and for the orthogonal axis are opposite (plus/minus) to each other.
When the positioning direction for the X–axis (orthogonal axis) is minus,
and the positioning direction for the Y–axis (angular axis) is plus, the
operation shown below is performed.
Y–axis: Positioning in the plus direction
+X (orthogonal axis)
X–axis: Compensation in the minus direction
Temporary
stop
Move command in the plus direction
+Y (angular axis)
Actual move coordinate system
q (inclination angle)
Program coordinate system
Move command in the plus direction
D When the inclination
angle of an angular axis
(parameter No. 8210) is
1° to 89° or 181° to 269°