That is a sweet setup you have Andy... That hob does not look cheap.. The problem with the Bell Everman drive setup is that by the time you cut the belt engagement grooves in the mating surface you have basically created a rack that is engaged with a belt rather than a pinion and to me that defeats the entire purpose of a low cost belt drive. You might was well go with a steel rack with one or more pinions engaging it.. although the belt does eliminate lubrication issues.
I saw another setup where they glued a belt to the mating surface to create the rack.. but I can see a lot of problems with that.. Bonding polyurethane to steel seems to be an art. Dave On 11/6/2013 3:49 PM, andy pugh wrote: > On 6 November 2013 19:47, Marshland Engineering > <[email protected]> wrote: > >> I was wondering if anyone has a similar configuration that is run with >> toothed belts instead of ballscrews? > Have a look at the Bell-Everman "Servobelt" arrangement. That > minimises the amount of belt that has the chance to stretch and, by a > fortuitous twist, keeps dirt out of the teeth. > > I can make T5 profile pullleys (I have the hob and a hobbing machine, > and now that I have the X axis working (which the pulley was for) the > surface finish is better too) > http://youtu.be/ltmZrDrt6pQ > ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
