Are you engaging three ring gear teeth? Do you want a split nut for backlash adjustment?
On Mon, Oct 28, 2013 at 9:01 AM, andy pugh <[email protected]> wrote: > On 28 October 2013 13:41, Stuart Stevenson <[email protected]> wrote: > > Do you have a design you can share? I would try to model it. > > The idea is stolen from: > http://urobotics.urology.jhu.edu/projects/BW/ > (I hate to think what a urology department intends to do with a ball worm) > > I was trying to model an enveloping version. Starting with a set of > equally spaced points round a circle as the centre-lines of the balls. > > I ended up creating the waisted spiral as a set of points in Excel, > joining them as a spline in Inventor, then using that as an extrude > path to cut out the slots for on position of the worm. > I then rotated that cut feature around the axis of the worm wheel. It > soon became clear then the resulting tooth-spaces are not > semicircular: > > https://picasaweb.google.com/lh/photo/z7gpHGfuYsP79pjRZ7xo4tMTjNZETYmyPJy0liipFm0?feat=directlink > > I think that the underlying problem is that the helix angle changes as > the engagement radius changes. It may be that a suitably modified > spiral can make it work. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > > ------------------------------------------------------------------------------ > October Webinars: Code for Performance > Free Intel webinars can help you accelerate application performance. > Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most > from > the latest Intel processors and coprocessors. See abstracts and register > > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. Just for you NSA - think autointercourse terrorist suitcase bomb sarin hello ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
