Function: This command specifies an ellipse arc through the target coordinates X/Y, the ellipse midpoint I/J, the ellipse main axis directions K, and the length ratio R between the primary and secondary axes.
Syntax
G8 X Y Z R I J K A B C P Q U V W F E H L/O D S
G9 X Y Z R I J K A B C P Q U V W F E H L/O D S
|
G code word |
Description |
|
X Y Z |
Target positions of the Cartesian axes |
|
R |
Length ratio R between primary and secondary axes. R is within the range of ]0, 1]. R is used only if the ellipse arc is not defined uniquely by the end points, midpoint, and slope of the primary axis. This is the case when both end points have the same distance to the primary axis. Then, both end points must have the same distance to the secondary axis. Otherwise, there is no ellipse through these points and the system replaces the ellipse with a line. |
|
I J |
Midpoint |
|
K |
Direction of the ellipse primary axis (in degrees)
|
|
A B C P Q U V W |
Target positions of the additional axes |
|
F E |
Path velocity, path acceleration/deceleration |
|
H L/O |
Switch point |
|
D |
Tool radius |
|
S |
S profile |
The ellipse is a 2.5D object. This means that the ellipse always belongs in the xy-plane. Ellipses in other planes are not supported.
Example
N10 G0 X100 Y100 F100
N15 G98
N20 G8 X200 Y100 I150 J100 K45 R0.5
See also
