# FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
9. COORDINATE VALUE
AND DIMENSION
B–62764EN/01
126
The end point coordinate value can be input in polar coordinates (radius
and angle).
The plus direction of the angle is counterclockwise of the selected plane
first axis + direction, and the minus direction is clockwise.
Both radius and angle can be commanded in either absolute or
incremental command (G90, G91).
_
Gjj Gff G16 ;
_ ;
G15 ;
G16
Polar coordinate command
G15
Gjj
Gff
Starting the polar coordinate command (polar
coordinate mode)
Polar coordinate command
Canceling the polar coordinate command (polar coordinate
mode)
Polar coordinate command cancel
Plane selection of the polar coordinate command
(G17, G18 or G19)
G90 specifies the zero point of the work coordinate system as
the origin of the polar coordinate system, from which a radius
is measured.
G91 specifies the current position as the origin of the polar
coordinate system, from which a radius is measured.
Specifying the addresses of axes constituting the plane se-
lected for the polar coordinate system, and their values
First axis : radius of polar coordinate
Second axis : radius of polar coordinate
Gff
IP
IP
Specify the radius (the distance between the zero point and the point) to
be programmed with an absolute command. The zero point of the work
coordinate system is set as the origin of the polar coordinate system.
When a local coordinate system (G52) is used, the origin of the local
coordinate system becomes the center of the polar coordinates.
Command position
Actual position
Angle
Angle
Command position
Actual position
When the angle is specified
with an absolute command
When the angle is specified
with an incremental command
9.2
POLAR COORDINATE
COMMAND (G15,
G16)

D Setting the zero point of
the workpiece
coordinate system as the
origin of the polar
coordinate system