Owner's manual

Axis Motion
Chapter 14
14-8
Example 14.5
Arc Programmed Using + or - Radius
Arc 1
center angle less
than 180 degrees
Arc 2
center angle greater
than 180 degrees
G00X15Y30;
G00X15Y30;
G90G02X40.Y25.R18.F200; G90G02X40.Y25.R-18.F200;
M30;
M30;
Figure 14.5
Results of Arc Programmed Using Radius Example
X
Y
Arc 2
end point
start
point
40
25
Arc 1
R18
+
R--18
If the e nd point of the arc is not specified, or if the end point is the same as
the start point, do not use R. Only J, I, and K can specify the center point in
these cases.
Important: Any axis in the current plane that is not specified when
programming a circle defaults to the current axis position values. This
results in the end point of an arc having the same coordinate value as the
start point of the a rc for that a xis.
If I, J, and/or K is used to program the arc center the control will cut a
full circle.
If R i s used to program the radius of the arc the control will not move
the axis. This is because the control defines an arc with a 0 degree
center angle.