[wms]

HU,
I guess I still don't quite understand the question. I told you I was dence.

I'll try to clear up my thoughts.

Let's say you have a cavity that is 2 inchs deep, with tapered or radius walls at the lower half. And you want to use a 1 inch mill to do the top half but it won't fit into the bottom half.

You can set the extent box to a end depth of z-1.0 (or let the program figure out how low it can go)and then when you go back at it with say a 1/2 mill on step #2 you can set the extent box to start at say z-.975 and end at the defalt value(ie: z-2.) or any other value you chose.

That way the 1/2 mill will not recut the area the 1 inch mill already removed.

This work for both Mill2000 and XP.

This applies to solid model not 2d pockets.
As 2d pocket are bound by the outer boundarys that you pick and the software has no way to know that the area under the top boundary differs from that top boundary.