1. Circular interpolation
Circular profiles

2. Circular interpolation is carried out with Go2 or G03 code
Circular cutting motion
Arc or Radius Cutting is known as Circular interpolation
Milling machine operations involve circular motion for determining tool movement in the clockwise direction as well as the counterclockwise direction.
Circular interpolation is carried out with
Go2 or G03 code
Circular interpolation can be programed using radius (R ) value or (I J K) value

3. Circular interpolation using Radius
General format for G02 or G03
X Y R
G02 X Y R 1.5
Go2 means that it will be clockwise circular cut
X value
Y value is 4.25
R value is 1.5 is the length of radius

4. Tool Motion
Plane Selection:
G17 XY plane
G 18 XZ plane
G19 YZ plane

5. Programing Circular move
The general format is: G02 X8.25 Y R 1.5

6. Example
G17 G90
G2 X Y R5 F2

7. Profiling at constant Feed Rate
To maintain constant feed rate while profiling a contour:
Distance traveled at the center of the tool
Feed rate of the tool center:
linear motion
In circular motion
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8. Example
G17 G91
G2 X Y R - 5 F2

9. Program Heading of Program Plane Selection Tool Selection
The system in in proper motion mode(G90, G91)
The control in linear interpolation mode (G0 G1)
Feed rate and speed has been specified (F,S)
Circular Interpolation Direction ( G02 , G03)

10. Circular Interpolation