> From: andrew beck [mailto:andrewbeck0...@gmail.com]
> Hey guys. > > I have been thinking about my 4th axis I am going to make. > > I have my cnc mill working now though there is still a bunch of work to get > done. But I have been thinking about how I can make the best 4th axis and > after that 5th axis. > > I have narrowed it down to either harmonic drives or Hypocycloidal gear > boxes. After Andy Pugh posted an Ebay link for a harmonic drive like his a couple of years ago I jumped at it and bought it. I'm still way behind as I'm just working on the crucible to hold enough aluminium to cast the holder. Patterns are done and the STMBL runs it nicely sitting in the 3D printed example of what I'll be machining. But no faceplate or chuck yet either. And does have his working with the STMBL drive. He's the best person to report on harmonic drive for a 4th Axis. > > I am thinking the hypocyloidal type looks the most rigid and best to make > as it looks like the it would be very easy to make on a cnc mill and a > harmonic drive relies on a thin strain wave gear that is not the > strongest. I actually have a rather large one which I have been thinking > about using but I would like to go with a the hypocycloidal design instead. > > all you guys out there with awesome cncs sitting in your sheds have you > ever built one of these? I don't want to reinvent the wheel if I don't > have to. And I am on the track to making my cnc a 5th axis when I get to > it. First I will make the 4th axis and pump a bit of work through it and > make some money lol. But 5 axis looks pretty fun and cool and I think it > is finally doable for the pro diy person. > > I have all the toys like a surface grinder and lathes etc and of course the > cnc mill. > > also don't mind spending money if needed as it is a business. > > here are some links to get the ideas flowing > > videos > > https://www.youtube.com/watch?v=Eds48L4cJjM > > fuson 360 scripts to generate the gear profile. > > > https://github.com/mawildoer/cycloidal_generator/blob/master/README.md > https://github.com/tapnair/Fusion360HypocycloidGear > > > and just to show that it has been done before I say that the new Hass > umc500 has cycloidal gearboxes in it so the design must be pretty good. > > https://www.haascnc.com/machines/vertical-mills/universal-machine/models/umc-500.html > > > regards > > Andrew > > _______________________________________________ > 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
