Subject:
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Re: Jump Frog Jump!
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 13 Jan 1999 21:24:55 GMT
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Original-From:
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Pete Hardie <(pete.hardie@)StopSpam(dvsg.sciatl.com)>
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Viewed:
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1085 times
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Janet and Carl McIver wrote:
> It was mentioned that landing would be tricky, making recovery all the
> more difficult. I was thinking that if you had a centrally located "spike"
> that acted as the elastic band stretching mechanism, it could, in the
> process of resetting the launching mechanism also act as the uprighting
> mechanism.
> To make this more clear, imagine a robot with a beam that swung on a
> shaft mounted on the end, and that shaft is at one end of the robot. The
> motor drives the beam, and in the process of rotating, it stretches the
> elastic band until it releases on its own, then continues rotating as it
> "flies" and if the frog happens to land upside down or on its side,
> weighting and the beam serve to right side up your frog.
> I have seen this mechanism to upright some robots, but the purpose
> wasn't to jump, I think it was a Robot Wars contender, but that was a long
> time ago. It's kinda hard to explain, but if it needs more explanation, I
> will try again, although that means I get to explain how I would do it. You
> mileage may vary!
If I understand your description, it is similar to a kids toy I've seen
(this one was a fast-food giveaway from Disney's _Lion King_ promotion)
The toy is a longish wind-up car, but the key, instead of being on the
side,
is in the back, and rotates around the long side of the car.
Additionally,
the key is long and curves to follow the car surface, rather like the
clip
on a pen. When wound and released, the car rolls on its wheels for a
distance
and the key traverses the upper half. Then the key reaches the floor,
and pushes
the car over, rolling it over onto the wheels again, where it repeats
until
the spring winds down.
You would need to make sure the lever will rotate enough to right the
frog,
regardless of ladning orientation.
--
Pete Hardie | Goalie, DVSG Dart Team
Scientific Atlanta |
Digital Video Services Group |
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | Re: Jump Frog Jump!
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| -----Original Message----- From: Marcus F. Mellbin <lugnet.robotics@lugnet.com> To: lego-robotics@crynwr.com <lego-robotics@crynwr.com> Date: Wednesday, January 13, 1999 2:44 AM Subject: Jump Frog Jump! (...) cannot (...) It was mentioned that (...) (26 years ago, 13-Jan-99, to lugnet.robotics)
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