I'd mill it down do within 1 or 2 mm of the bottom of the material and then swap to a smaller cutter to remove just the outer of the thinner material and leave 3 supporting tabs. Remove the centre piece by hand and then do a single full depth cleanup pass.
I do this a lot when routing sheet MDF On Tue, 28 Feb 2023 at 21:46, Matthew Herd <herd.m...@gmail.com> wrote: > You could use a slotting strategy and tabs (at the bottom) to retain the > piece if you wanted to save the material. Then cut the tabs out by hand. > Optionally do another finish pass after manual removal if the wall surface > matters. But I’d probably just use an adaptive strategy to turn it into > chips. Easier and probably faster. As long as you can clear the chips > without standing there with an air gun or vacuum. > > > > On Feb 28, 2023, at 3:53 PM, Todd Zuercher <to...@pgrahamdunn.com> > wrote: > > > > I need to mill about a 3.75" hole through a piece of aluminum about > 1.75" thick. What is the best strategy to accomplish this on a cnc mill. > Is it best to us a pocketing strategy and mill out the entire hole from the > center out, or would it be better to use some kind of cutting strategy and > mill some size slug out of the middle? I can see the first option being > simpler, but the 2nd option saves a potentially useful piece of material, > but with the added complication of how to hold and prevent the chunk of > scrap from wreaking havoc when cut free. > > > > Todd Zuercher > > P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php> > > 630 Henry Street > > Dalton, Ohio 44618 > > Phone: (330)828-2105ext. 2031 > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
