The video shows only one planetary gear, which is obviously two gears, stacked.
Can there be three planetary gears, maybe each with a different top/bottom offset? I can't figure out if it would work, or just jam up? On 21 December 2017 at 11:18, Chris Albertson <[email protected]> wrote: > To make this really work for rotary tables you need a very fine pitch. I > have seen these 3D printed in plastic but they slip and don't handle much > torque because the outer ring deforms > One idea I had was to press fit the plastic ring gear into a short section > of steel pipe. > > Put you can buy these drives already made for about $250. That is really > not abad price for arc-second level precision and near zero backlash. > > > > On Wed, Dec 20, 2017 at 10:15 PM, Lawrence Glaister <[email protected]> wrote: > > > very cool Gene.... had some troubles playing the video, but I seem to > have > > the gist of it. It does seem like a very interesting design for rotary > > tables.... just have to figure out how to re-purpose some rear end ring > > gears and pinions.... hmmm... was thinking of regearing the jeep anyway!. > > Lawrence Glaister VE7IT > > > > > > On 2017-12-20 07:36 PM, Gene Heskett wrote: > > > >> On Wednesday 20 December 2017 15:06:20 Gene Heskett wrote: > >> > >> On Wednesday 20 December 2017 12:36:57 [email protected] wrote: > >>> > >>>> I got my first prototype working. It came out to be 60:1. > >>>> sun = 15 > >>>> first planet = 15 > >>>> first ring = 45 > >>>> second planet = 14 > >>>> second ring = 45 > >>>> I have a short video but can not post it here > >>>> > >>> > >>> Need more details plz. Like did you make or source the gears etc. And > >>> there's lots of places on the net to put a video, even my site (see > >>> sig) is available if you send it to me via a pm. I'll figure where to > >>> put it and make a link. Biggest problem is my upload back to the > >>> viewer is only about 2.5 Mbits/Sec. So playback may stumble. But at > >>> least it will be out there... > >>> > >>> Cheers, Gene Heskett > >>> > >> > >> Grumpy's video is now on my site in the sig, with a link from the front > >> page. Enjoy. Sure, its only plywood, but it works as a proof of > >> concept. I may see if I can make one in steel, with bearings. In wood, > >> its certainly compact compared to a worm and eccentric bull gear. > >> > >> > >> Cheers, Gene Heskett > >> > >> > > ------------------------------------------------------------ > > ------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > -- > > Chris Albertson > Redondo Beach, California > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
