Instead of carving away over 90% to make one I wonder it an outside of the box approach might work.
Start with a piece of pipe stock close to the right size. Turn bevels on the bottom edge and a disk to fit against the bottom. Weld in a disk at the bottom. Heat treat and allow to cool to leave material soft as possible. Turn the inside to a predefined diameter and press in a support hub that has a center hole that will be used for support. (Possibly epoxy and a slightly looser fit for all but both ends? )Turn in the chuck and drill a center hole on the other end and face plus add the radius on the edge. Mill the 4 or 5 lightening holes in the bottom and put it back in the lathe and in Andy's case hold it in the chuck since he can move that to his Harmonic Drive. Hold the other end with a ball bearing center. Or use the center at both ends and a drive dog. Now turn the diameter continuing from the radius leaving the thicker outboard end for the tooth form. Again in Andy's case transfer the chuck to the harmonic 4th axis. Install that Hob that he's always wanted to learn how to make and cut the teeth. Heat the end result enough to soften the epoxy and press out the hub. If the dimensions are correct you have a soft hub that now needs hardening/tempering. Just an idea. John > -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: January-05-21 12:42 PM > To: ra...@linwin.com; Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] I wonder if I can fix it? > > On Tue, 5 Jan 2021 at 20:36, Rafael Skodlar <ra...@linwin.com> wrote: > > > > I am seriously considering trying to make a new flexspline. I mean, > > > how hard can it be? > > > > > > > Based on what I know about harmonic drives, extremely hard. > > Yes, I was being a little sarcastic. But if I don't expect to make a > _good_ one, I think I can do it. > > > https://www.harmonicdrive.net/technology > > > > Rather usefully that has a picture of the tooth shape. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > � George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > 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
