The Leads tab controls how the tool moves on and off the surface milling feature (lead in/out) and how the tool moves between toolpaths (stepovers).
Ramping
If Ramp to depth is not checked, the tool will plunge to depth. If Ramp to depth is checked and Helical is not checked, the tool will zig-zag into the material. The angle of the zig-zag passes is controlled by Ramp angle. If Helical is checked the tool will spiral into the material. See Helical ramping for more information.
Lead moves
The Use lead in/out controls when lead in/out moves are applied. If Normal to surface is checked, the lead in/out moves are performed with respect to the surface normal. If it is not checked the moves are performed in the plane of the toolpath. The Lead in/out plane controls how the arcs and ramps are measured.
Lead moves are either performed as arcs or linear moves by selecting one of the following categories:
The moves between toolpaths are controlled by the Stepover type.
See also Overview of surface manufacturing, surface milling feature dimensions tab, 3D Milling methods, strategy tab, Tools tab, milling tab