Either something has changed in the newest version of CC pro, or I just have not noticed it in the past.
I am trying to cut a 3D path inside of a raised, 1/4" wide border.
The 3D rough and 3D finish limits are set to the inside edge of the 1/4" border.
I am roughing with a 1/4’ end mill. I would expect the roughing path to act the same as a pocket, running right to the edge of the limits. However, it is not doing that, it is centering the 1/4" bit on the edge, leaving only a 1/8" border.
The final path is reading the limits like it should.
I can remedy this by creating a line offset 1/8" inside and using this for the roughing path, but that does not seem right.
Is this a glitch?
I have attached an example to try to support the gibberish I am spewing.
Both the rough & finish 3D paths use an “On” condition (No offset) for the boundary, rather than a “Tangent” condition which sounds like what you are expecting.
Pocket path uses a “Tangent” condition for the outer boundary.
So if you are roughing with a 1/4", and finishing with an 1/8" you would need 2 inside offsets, one at 0.125 for the rough, and another at 0.0625 for the finish. Assuming you want both paths to cut right to the inside wall of the pocket.
Your assumption is right, I do want both paths to cut right at the edge. I am guessing my finished path looks like it was right due to the small size of the bit.
What I am hearing is, hypothetically, if I am using a 1/4" for the rough and 1/8" for the finish that I would need a line offset for my rough at 1/8" and for my finish at 1/16" to bring it right to the edge.
All 3D paths I have done to date have gone to the outer limits so I never noticed it.
Yes, when it cuts out to a wall you would notice, but not if the floor just runs out to the edge.
you may also notice when carving 3D on top of flat areas cut with 2D. In that case I usually offset the 3D boundary just a bit larger than half the diameter of the tool. So about 0.130 for a 1/4" tool.
