9 NC Programming Routines
9.2 Circular Interpolation Programming in the XY Plane
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The codes used in circular interpolation are listed below.
Info Table: Circular Interpolation Codes
Code
Explanation
G02
Moves tool along circular path in clockwise direction.
G03
Moves tool along circular path in counterclockwise direction.
I
Specifies X-axis coordinate of center point
J
Specifies Y-axis coordinate of center point
An example of circular interpolation is shown below.
NC Code Example:
N8%
N9G90X0Y0Z-.1
;SET START POINT
N10G02X1Z0I.5J0F2;CLOCKWISE TO X1,Y0,Z-.1
Code
Explanation
N8 %
Sets incremental arc center mode.
N9G90X0Y0Z-.1;SET START
POINT
The first line defines the starting point and sets all coordinates,
except for arc centers, to absolute mode.