On Wednesday 06 November 2013 17:58:53 andy pugh did opine:
> On 6 November 2013 21:08, Gene Heskett <ghesk...@wdtv.com> wrote:
> > That sure looks doable. And scalable to any size. And with that many
> > teeth engaged at once, it should be essentially unbreakable and very
> > low lash if properly adjusted with the wedges. They, I assume
> > actually adjust the eccentricity of inner gear?
>
> No, those adjust the play in the anti-rotation cruciform part.
> Old-school tapered gibs. I was seriously considering dovetail slides
> but I think that might make assembly harder than necessary.
>
> Eccentricity could be adjusted by a second, thin, static eccentric
> round the main one.
Ok, I wondered about that since the animation doesn't show that at all
well. I'd have to assume a narrow shoulder, drilled for a setscrew or 2 to
lock the adjustment of this outer eccentric to the inner one the motor is
driving.
Tapered gibs, which can be power driven in both directions should be quite
suitable since thats a large area wear point with not very heavy loading.
Has trial code to carve been composed yet?
And has it been analyzed for back driving ease or difficulty? Given low
friction, and dual eccentrics at each corner driven in unison, it does
appear to be both pretty efficient, and back drivable to me.
As you can see, I am drooling about its possibilities. And I have a stock
of 1/2" x 4" 7078T6 for the exterior frame sandwich. ;-)
Cheers, Gene
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