Subject:
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Re: Lazy Tongs
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 10 Aug 1999 15:01:37 GMT
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Original-From:
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Matt @ Medical Informatics Consulting <medinfo@shell.arosIHATESPAM.net>
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Viewed:
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624 times
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Have you tried a variation on the rack-and-pinion steering design. The
old "Expert" sets used it to some degree of success.
Basically this involves using a 8-tooth gear and some of the flat "gear"
plates. The 8-tooth gear rotates and pulls a 1 by X platform underneath
it. This does take up a bit of room, but by pulling on both left and right
sides rather than the traditional style of using one fixed side and one
moving side.
Matt
matts@medinfoconsulting.com
medinfo@aros.net
On Tue, 10 Aug 1999, Todd Bertschi wrote:
> Hello All,
>
> I have a mechanical problem (in addition to all my others).
>
> I'm building a delivery system. A small bot will drive a line to a specified
> point. It will then lift a small platform up (not too far. Compressed, it's
> about 3 inches tall. Expanded, about 9 inches.) The problem I have is
> getting the tongs to compress. For those of you not familiar, this is based
> on the expanding "puncher" on the Cyberslam sets.
>
> The essential problem is converting rotary motion to horizontal motion. I
> don't want to use pneumatics. They'd take up too much room. I converted Lego
> Leo's Archamedies screw, but I can't get enough grip on the axles. Basically,
> when I bring the platform down, it pulls all my pieces apart. Or they just
> slid up and down the axles.
>
> Anyone have any suggestions?
>
> -T
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: Lazy Tongs
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| (...) Yeah, that was the first one I built. It works, but not well. I think it was my design. The "piston" kept moving left and right off the track. I'm rebuilding it now with an experimental design. I may have to bite the bullet and use it. I'm (...) (25 years ago, 11-Aug-99, to lugnet.robotics)
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Message is in Reply To:
| | Lazy Tongs
|
| Hello All, I have a mechanical problem (in addition to all my others). I'm building a delivery system. A small bot will drive a line to a specified point. It will then lift a small platform up (not too far. Compressed, it's about 3 inches tall. (...) (25 years ago, 10-Aug-99, to lugnet.robotics)
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