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Still more snippage. With sone new crossposts!
In lugnet.castle, Anthony Sava wrote:
> In lugnet.castle, Larry Pieniazek wrote:
> > Now you need to mindstorms control so that the mill blades rotate and it
> > randomly shifts direction slightly as if it were responding to wind changes...
> > no wait, the miller does that... ok, the miller has to come out and push it...
> > well, that may be a bit much to do with one RCX. :-)
>
> You're in luck Larry.
>
> According to what I've read, during the 17 or 1800s, a new invention appeared
> for Post Mills. It was a small rotor attached to the back wall of the mill.
> This rotor was placed perpendicular to the main rotor, and though I wasn't able
> to figure it out, I assume this smaller rotor turned some gears.
>
> So when the wind shifted, it would spin this perpendicular rotor, turn the
> gears, rotate the mill to face the wind, and the small rotor would stop now that
> the main rotor was facing the wind and not it (I would assume the roundhouse
> would protect the smaller rotor from oncoming wind when it was facing the right
> way).
>
> And somewhere between the 1200s and 1800s, the post at the bottom of the mill
> began to be encapsulated by a building for extra storage. This would be an
> excellent place to hide an RCX (unless you built a hollow hill, which would do
> the same thing) though that my Mill would be too small for that.
>
> So basically mindsorming the mill's rotor AND rotation wouldn't be an issue at
> all. Especially if you didnt plan to have it rotate more than say.. 90 degrees,
> so that you could have a hollow center to the post mill for a motor wire to hang
> from to power the main rotor.
Im not so keen on motor wires if they can be avoided.
I'm thinking that if you were clever you could have as much rotation as you
like, because you could house the motors in the base. Use a central shaft for
carrying the power to the blades and use a technic turntable (2855 Turntable,
24t id, 56t od ) inner gear ring (take the turntable apart so that you only have
one ring, not the other one, then build the ring into the base of the rotating
part of the mill) driven by an offcenter 8 tooth gear shaft that you disguise
somehow in the bottom building or the hill. With idler gears the shaft that
comes up doesn't need to be where the gear ring is, it could be not very far off
center at all. Or maybe not, that's a planetary arrangment and you'd have
trouble getting the gears to stay in place.
Note that I've crossposted because I'm not very clever at all about this sort of
thing and may be all wet, hopefully some of the technic/robotic mavens will
comment further
For some other ideas for how to get multiple drives up into something that needs
to rotate freely, take a look at some of the clock designs that have been done
by various technic wizards, the minute and hour hands rotate around the same
shaft but move differently. Once you've sussed that motion, splitting off one of
the motions to power the windmill's blades seems easy.
It's too bad that the 2x2 round brick has an axle (+) hole in it instead of a
round one. That seems like it would be ideal for carrying concentric motion up.
The axle sleeve tube isn't long enough to really do much with, plus how do you
exit? The ribbed tube comes in various lengths but how do you transmit motion to
it?
The dark grey differential gear (6542 Conical gear, 16t)
may be of some use here somehow, not sure. It has a central hole that is
round, not +. So do the differential housings.
http://isodomos.com/technica/technica.html is always a good resource when trying
to think about these sorts of things
Note further that I'm not saying that YOU necessarily ought to do this, we're
purely theoretical here.
But if this can be sussed out, Dan Siskind's windmill kit could be so motorised
as well. (currently the blades work the grindstone, and the top rotates as you
like with no effect on power transmission, but there are no external drive
provisions)
Fascinating topic!
++Lar
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