On Monday, February 21, 2022 10:14:20 AM EST andy pugh wrote: > On Sun, 13 Feb 2022 at 16:58, gene heskett <ghesk...@shentel.net> wrote: > > Does anyone else have a better idea? > > For a simple thread? I would just hand-code a G76.
G76 isn't terrible handy for a buttress thread being carved on a hard maple stick 20" long for a woodworking vise, turned by a B axis, with the 24k rev spindle doing the carving while y is being advanced by the pitch per rev. And its a two start thread with about an 8mm pitch. Half nuts will not be articulated and are already printed, so I waste short scrap sticks getting the thread right to match the nut. I just thought (erroniously it seems) someone else might have already invented that 2 start buttress thread wheel and would share. I'm a ways yet from making sawdust with a ten pack of 1/16" round nosed SC mills. So I haven't even written a good outline of how it should work, yet... And this hasn't yet reached the first page of stuff I need to do before cutting up $140 worth of hard maple. The Z drive motor of this 6040 mill is quite puny for lifting the spindle, so I might wind up installing on the Z drive, one of the new 3 phase stepper/servo's. I'm useing one of them, with a Gene designed 50/1 harmonic drive turning the B axis. And I'm waiting on a pair of teeny little nema-11 drives that if I can figure out how, will tilt the spindle motor on the x axis. Having a 3d printer opens up all sorts to ways to do something. Like holding the end of a 2x2 stick, on center in the B drives existing 3 jaw chuck. That gizmo is on the printer, about 40% done right now. Thanls Andy. Stay well. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
