Chapter 3 G Command
43
I Programming
positive direction in the currently selected plane, and when it is negative, the polar coordinate rotates
clockwise.
Set the zero point of the workpiece coordinate system as the origin of the polar coordinate system
When the polar coordinate command mode is set to start by G90, the origin point of the current
workpiece coordinate system is set to be the origin of the polar coordinate system. When a local coordinate
system (G52) is used, the origin of the local coordinate system is set to be the origin of the polar coordinate
system.
Set the current position as the origin of the polar coordinate system
If the polar coordinate command is set to start by G91, the current position is set as the origin of the
polar coordinate system.
Specify radius of polar coordinate system
In absolute mode, the specified radius is the distance between the program point and the origin of the
polar coordinate system.
In relative mode, the specified radius is the increment of the current radius of the polar coordinate
system.
Specify angle of polar coordinate system
In the absolute mode, the specified polar angle is the rotated programmed angle taking the vector
which is parallel to the 1
st
axis as the rotary side, and taking the polar point as the rotary center.
In the relative mode, the specified angle is incremental value of the current angle (the vector angle
from the origin of the workpiece coordinate to the current position).
The origin of the altered polar coordinate system
In the program, once the origin of the polar coordinate system is specified, it is valid in the polar
command. If the origin of the polar coordinate system is to be changed, the polar coordinate command must
be specified again.
See the following program:
Содержание 980MDc
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