Re: [CAD_CAM_EDM_DRO] create a cut out vs pocket

ebiz_59 wrote:

> i have a part that is flat - say 0.25" thick and I want to cut a 1.75" x 1.5" double "D" shape out of the center of it. I can "pocket" it but that creates a whole bunch of chips that I don't really want or need to create. What do I call this cut out area instead of "pocket". The goal is to make a couple trips around the perimeter of the cut out area. THANKS!
>

Some people call this "trapanning". You make one (or multiple) passes
just inside the
final dimension, let the slug drop out, and then make a final pass to
clean up the
edges and bring it to final dimensions. I have some routines that do
round holes
and rectangular holes/slots, but these are specific purpose programs and
don't
handle arbitrary shapes like the double-D. Not knowing your CAD/CAM
program, I don't know what they'd call it, but you can search for
trepanning.

Jon