The following illustration shows Cut Line machining with Open Ends cut lines. Surfaces (1, 2, 3) are selected for milling. Select chain (4) as the start cut line and chain (5) as the end cut line.
The following illustration shows Cut Line machining with Closed Loops cut lines.
Part to machine
Select this contour as the start cut line (use Bndry Chain)
Select this contour as the end cut line (use Bndry Chain)
Select all the top surfaces
In some cases, when the surface topology changes abruptly at some point between the start and end cut lines, you may need to specify intermediate cut lines. In some cases, inner cut lines can also be selected automatically by using the Auto Inner Cutlines option.
The following illustration shows specifying intermediate cut lines.
Start cut line
Inner cut lines
End cut line