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 01:55:14 GMT
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Viewed:
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21495 times
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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
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
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
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Some help or advice requested
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| (...) Hmm, an interesting solution. (...) 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. (...) (15 years ago, 22-Jan-10, to lugnet.technic)
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