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Master Fanuc Circular Interpolation (G02/G03) with Practical Code Example

Fanuc Circular Interpolation

Fanuc Circular Interpolation commands (G02, G03 G Codes) are used to move a tool along a circular arc.
G02 – Circular Interpolation Clockwise.
G03 – Circular Interpolation Anti-Clockwise.

How to Program Circular Interpolation?

On CNC lathe machines with Fanuc control Clockwise Circular Interpolation (Arc) can be programmed in following ways.

N10 G02 X Z R
or
N10 G02 X Z I K

Explanation

N10 G02 X Z R

X – Arc end-point in X-axis
Z – Arc end-point in Z-axis
R – Arc Radius.

N10 G02 X Z I K

X- Arc end-point in X-axis.
Z – Arc end-point in Z-axis.
I – Distance from arc-start-point to arc-center-point in X-axis.
K – Distance from arc-start-point to arc-center-point in Z-axis.

Master Fanuc Circular Interpolation (G02/G03) with Practical Code Example

Fanuc Circular Interpolation G02

Fanuc Circular Interpolation G02 G Code Example

The following Fanuc circular interpolation program example is programmed in multiple different ways.

CNC programmers/machinists can use G02/G03 X Z R method or G02/G03 X Z I K method if control allows.

Master Fanuc Circular Interpolation (G02/G03) with Practical Code Example

Fanuc Circular Interpolation G02 G Code Example

(Diameter programming)

G02 X50 Z30 I25 F0.3
G02 U20 W-20 I25 F0.3
G02 X50 Z30 R25 F0.3
G02 U20 W-20 R25 F0.3

CNC Machine

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  7. Master Circular Interpolation: Programming Example 1
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