# Inserting roundings using G302 as example

With G302 the I word defines the radius of the inserted arc. Its centre point is the intersecting point of the two equidistances with an interval I to the programmed path. The positions of the equidistances are selected so that the programmed contour is retained as far as possible during the contouring operation.

## Notice

No contouring radius can be inserted in tangential block transitions.

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N10 G91 G01 X60 F100 | ;P1
N20 G302 I30 |
N30 X-40 Y-55 | ;P2
: |

Inserting an arc between two straight lines

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N10 G91 G02 X80 I40 F100 | ;P1
N20 G302 I40 |
N30 G02 X50 I25 J-15 | ;P2
: |

Inserting an arc between two circles (angle α ≥ 180°)

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N10 G91 G02 X80 I40 F100 | ;P1
N20 G302 I5 |
N30 G02 X60 Y35 I20 J35 | ;P2
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Inserting an arc between two circles (angle α < 180°)