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
