Specifications

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CONCISE GUIDE FANUC 28

3.4 “G2 / G3” CIRCULAR INTERPOLATIONS

Functions G2 and G3 are programmed to make circle arcs in clockwise or anti-clockwise direction as

shown in the figure:

The block with circular interpolation is programmed:

N24 G2 X… Z… R… ; Clockwise

N31 G3 X… Z… R… ; Anti-clockwise

Or:

N15 G2 X… Z… I… K… ; Clockwise

N18 G3 X… Z… I… K… ; Anti-clockwise

Where:

• G2 / G3 => Direction of circular interpolation

• X => Co-ordinate of final point along axis X

• Z => Co-ordinate of final point along axis Z

• R => Radius of circular interpolation

• I => Incremental distance of starting point at the radius centre

of the interpolation along axis X (radial value)

• K => Incremental distance of starting point radius at the centre

of the interpolation along axis Z