On Tuesday 26 January 2021 15:11:02 Chris Albertson wrote: > On Tue, Jan 26, 2021 at 11:30 AM Gene Heskett <[email protected]> wrote: > > But that brings up the tooth profile problem. I've not seen a > > timing belt that resembles the triangular splines? > > Is there a reason you need triangular splines?
Triangular shapes would slide down and back the slope better and smoother as the bearings are forcing the mesh. But the belt shouldn't be rubber or similar elastomer faced as it will need some sort of chicken fat for lube if its going to be at all efFicient at the sliding. And the lube should be compatible. I's seen cisco recommended but my results weren't really that good, although it didn't seem to hurt either. > I think round ones > might work better. They are the best shape for timing pulleys Round is good where it fits, round to round doesn't > You are NOT going to find ready-to-print STL files. No one has done > a really good job on this yet. I'd suggest a from-scratch design that > starts with a stock belt and builds the rest of the product around the > belt. I'd agree if we can find a belt with the correct tooth profile. But I'd probably have to argue with the helt makers to get it while waving the checkbook. NREngineering costs would eat our lunch for the first 100, 102 tooth spline belts 4 or 5" long and say 2" wide to give it room in he middle to flex with an inch between 2, 1/2" wide pulleys. Even somebody hungry would need 50-100k$ just to get started on such a beast. But the bearngs pushing in from the outside sounds like a good idea. The input and output shafts would have to be coaxial, on the same face or maybe that would be a good excuse to put a bearing on both ends of the input shaft. Details to be worked out. But first, a suitable belt. Without that, the idea is dead just from the cogging we would get from todays tooth profiles. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
