I am using BobCad V3. When I select Mill, Profile and define the operation it leaves material on all cornners. Using a 1/2 inch endmill and coming in 1/2 inch it wants to do it in one side pass coming in the full 1/2 inch leaving cornners. How do I get to make several passes and clean off all the meaterial? I am using a Hurco KMB1-BX. (the depth of cut is 1/2 as well and I am able to set it to make 4, 1/8 inch cuts in the Z.) Also when I select top of part it puts it at 1/2 inch instead of Zero, Why?