I'm still unsure about correct profile of internal tooth, I get some indicies from university papers, but there's nothing in my engineering reference book, nor on the internet. It's not important application, just a little gearbox for a RC toy, but I'd like to know it. I'll probably have to construct it in CAD.ian.rees wrote: ↑Wed Oct 03, 2018 6:10 am Also not a gear expert, but I think the internal/external spur gear difference is a little more than just terminology (and, I am sure that "external" in this context means "spur that has the teeth pointing out" - the Part Design tool is the right way around). The addendum of one becomes the dedendum of the other, obviously, and the involute parameters will be the same. But, I think as a practical matter you'd not want to specify the root radius of the internal gear, by making a rounded tooth tip of an internal gear, then inverting it... Often the internal gear has to have different dimensions to prevent the tips of teeth from interfering, and that sort of thing too.
Yes, I'm using FCGear . Simple to use but powerful tool.ian.rees wrote: ↑Wed Oct 03, 2018 6:10 amThat said, looo has made a rather nice gear workbench: https://github.com/looooo/FCGear
May I know, how do you ensure low visualisation deviation? I don't get any results googling the term itself...