Lead in

This parameters define the lead mode.

The different offered choices are :

Direct

The lead in toward the face is done by directly joining the current point of the tool path to the entry point.

Perpendicular

The lead in on the face is done perpendicularly.

Tangential

The lead in toward the face is done using a circular arc.

Helicoidal

The lead in on the face is done following an helix.

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