another painful video https://www.youtube.com/watch?v=U3e83H2mEyk
On Sat, Mar 13, 2021 at 8:40 PM Sam Sokolik <samco...@gmail.com> wrote: > Getting closer... I have to drill a bunch of holes in the face plate... > also have to preload the wheel bearing (grind a bit from the center) > > http://electronicsam.com/images/greenmachine/IMG_20210313_201227.jpg > > On Fri, Mar 12, 2021 at 10:41 AM Gene Heskett <ghesk...@shentel.net> > wrote: > >> On Wednesday 10 March 2021 12:58:08 John Dammeyer wrote: >> >> > Hi Sam, >> > I found by making the wall thickness bigger along with the hole >> > smaller and hub larger I was able to mount the hub on the lathe and >> > bore both the bore and the outer part of the hub on the lathe to make >> > them symmetrical. That reduced a lot of wobble compared to earlier >> > versions. >> > >> > In hindsight I would also have made some sort of holder that allowed >> > me to skim the inside of the actually pulley part. Instead I used >> > sandpaper because as you can see it has the same roughness from the 3D >> > printer as your toothed belt section has. >> > >> > The hub was a smooth press fit (by hand) in and out of the pulley >> > part. The photo showing it mounted still has the yellow pulley that >> > had too small of a hub and the pressure from the set screw cracked it. >> > So the new green one has a wider set screw area. >> > >> > I suspect the biggest issue with your flex pulley would be holding it >> > stable enough so you could skim away material. Might even be best to >> > print it with a flat face to hold it round. Then mount it in a >> > holder, skim the inside surface and then cut through the face at the >> > back. The flat face could even have mounting holes to mount onto the >> > back of your plate. This would keep it from turning in the mount >> > while you skim it. >> > >> I've got a better idea, since LCNC can do a taper, taper the holder 2 >> thou, drive it all the way in so its gripped good, bore it to half that >> taper, pull it out, turn the other face and repeat w/o touching the x >> dial. Just make sure all the burrs on the teeth from the printer are >> well cleaned off with a fresh blade in a box knife. Burrs will show as >> wibbles in the bore if you dont. :( >> >> > John >> > >> > > From: Sam Sokolik [mailto:samco...@gmail.com] >> > > >> > > another update - at 1/2 step - the discrete resolution should be >> > > about 40,000 divisions per rotation. .009 deg. >> > > >> > > https://www.youtube.com/watch?v=IdfKre6zpEY >> > > >> > > On Thu, Feb 4, 2021 at 4:00 PM Sam Sokolik <samco...@gmail.com> >> wrote: >> > > > https://www.youtube.com/watch?v=ZVVffljc7kE >> >> >> 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) >> 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 >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
