On Fri, 17 Dec 2021 at 15:27, Todd Zuercher <to...@pgrahamdunn.com> wrote: > > Andy, Initially I thought what you are saying about the pitch diameters > needing to be the same was true. And that would be the case if all the > pinions had the same tooth count and size. But When I was modeling it I > found that if all of the module was the same for all the gears, and adding > one tooth to the output set, and the output pinions, their pitch diameters > still meshed perfectly.
I think that whilst that will work in theory, getting it assembled right would be a problem. With two ring gears with the same PCD but +1 teeth on one gear you can have pinion pairs with equal teeth and a fixed phase offset. These can be assembled in any rotational orientation (as long as they are in the right place relative to each other) Also, with such an arrangement you can drive the pinions with a small sun gear, for a second level of reduction. You just have to make sure that the sun gear toothcount is divisible by the number of plantets, and also that you drive the unshifted half of each pinion (I think) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
