Hole with bigger diameter at the bottom

[Ken Sims]

Hi,
I'm working on a project that requires me to make a circle/pocket that is larger at the bottom 3.16" then at the top 3.6". I was wondering if there is a way to make the bit go down in the center. Then make a pass at 3.16" and move back to the center before coming out of the material?

[adze_cnc]

Basically you'll use a variant of Adrian's reply at this thread: viewtopic.php?p=284705#p284705 with the addition of a circle. A sample (not to the right size) is attached. The vector is one open vector that starts and ends at the "center" of the circle.

By the way. Are you sure about those numbers? 3.16 at the bottom but a "smaller" size at the top of 3.6?

[Ken Sims]

Thanks adze_cnc
I'll give it a try. Ya, the project requires a larger bottom. It is a first for me. But hay, I learned something new.
Thanks again