Subject:
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Re: Some help or advice requested
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 26 Jan 2010 12:02:30 GMT
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Viewed:
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32691 times
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In lugnet.technic, Kevin L. Clague wrote:
> In lugnet.technic, Owen Dive wrote:
> > In lugnet.technic, Kevin L. Clague wrote:
>
> <snip>
>
> > Hmm, an interesting solution.
> > > Presuming you can do that, then all
> > > you have to do is somehow get the weight back to the starting position.
> >
> > But there's the rub! I'm afraid I can't see an obvious way to do that, given
> > that the weight will need to be positioned quite precisely. I will play around
> > with it, though, and see what I can come up with.
>
> I've got a slightly different solution, where the tray tips an inverted pendulum
> right and left. The pendulum's momentum/weight flip the polarity reverser.
>
> The tri-blade bounds the inverted pendulum's swing.
>
> The first three steps represent the basic inverted pendulum.
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=4312628
Direct access:
http://www.brickshelf.com/gallery/kclague/fun/fun_page_1.png
>
> The yellow beam added in step 2 is the inverted pendulum (on which you can add
> your favorite weight attachment).
>
> In step 4, you can limit the range of motion of the inverted pendulum (if you
> wish). Other limiting devices (8T gear, 1/2 bushing, etc.) can be used instead.
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=4312629
Direct access:
http://www.brickshelf.com/gallery/kclague/fun/fun_page_2.png
>
> I don't know if the tray's slow progression right and left can eventually tip
> the inverted pendulum past center (it depends on if the inverted pendulum can
> reverse the tray's travel)..... but if it can it might help.
>
> Kevin
Kevin
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Message has 1 Reply:
 | | Re: Some help or advice requested
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| (...) A nice solution, but I doubt very much if my tray could push the pendulum upright (especially since the total angular travel would be the limited movement of the pendulum _plus_ the angle that the tri-blades had rotated). However, for (...) (17 years ago, 27-Jan-10, to lugnet.technic)
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Message is in Reply To:
| | Re: Some help or advice requested
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| (...) <snip> (...) I've got a slightly different solution, where the tray tips an inverted pendulum right and left. The pendulum's momentum/weight flip the polarity reverser. The tri-blade bounds the inverted pendulum's swing. The first three steps (...) (17 years ago, 26-Jan-10, to lugnet.technic)
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