
B–63002EN/01
8. COORDINATE VALUE AND
DIMENSION
NC FUNCTION
97
The end point coordinate value can be input in polar coordinates (radius
and angle). Use G15, G16 for polar coordinates command.
G15 : Polar coordinate system command cancel
G16 : Polar coordinate system command
Plane selection of the polar coordinates is done same as plane selection
in circular interpolation, using G17, G18, G19.
Command radius in the first axis of the selected plane, and angle in the
second axis. For example, when the X-Y plane is selected, command
radius with address X, and angle with address Y. The plus direction of the
angle is counter clockwise direction of the selected plane first axis +
direction, and the minus direction the clockwise direction.
Both radius and angle can be commanded in either absolute or
incremental command (G90, G91).
The center of the polar coordinates is the zero point of the workpiece
coordinates. (However, if the local coordinates are set, it is the zero point
of the local coordinates.)
Both hole cycle
N1 G17 G90 G16;
Polar coordinates command, X-Y plane
N2 G81 X100. Y30. Z-20. R-5. F200.;
100mm radius, 30 × angle
N3 X100. Y150;
100mm radius, 150 × angle
N4 X100. Y270;
100mm radius, 270 × angle
N5 G15 G80;
Polar coordinates cancel
Y
270°
X
Workpiece coordinate system
150°
30°
100mm
8.2
POLAR COORDINATE
COMMAND (G15, G16)
(M series)
M series
Examples