Z value of 3D arc on last pass

Learn more about the interface for the Lead in/Lead out parameters, by clicking the link here.

Overview

The Z Plunge Distance on Bottom Radius defines the vertical (Z-axis) movement applied during the Lead in and Lead out arc transitions.

When this parameter is set to 0, the tool follows the Lead in and Lead out paths without any vertical movement, remaining at a constant Z level.

When a value is defined, the tool performs a progressive vertical plunge along the arc, descending (or ascending) while following the entry or exit radius. This creates a smoother transition into and out of the material.

• Without Z plunge: the toolpath remains flat in the XY plane.

• With Z plunge: the toolpath follows a combined XY + Z movement, resulting in a sloped entry and exit.

This parameter applies to both Lead in and Lead out, improving cutting conditions by reducing sudden tool engagement and distributing the load more gradually.