Subject:
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Re: Rope Climbing and Can Crushing at BrickBots.Com
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 13 Feb 2001 20:56:52 GMT
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Viewed:
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492 times
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In lugnet.robotics, Richard Sutherland writes:
> Today a new contest starts! Here is your chance to extract your revenge on
> all those empty soda cans:
>
> Can Crushing
> Start Date: 2/12/01
> End Date: 2/26/01
> Description:
> Crush three (3) soda cans as quickly and completely as possible using only
> LEGO power.
> Score Type: Time
>
> Complete rules:
> http://brickbots.com/rules.asp?cid=29
>
>
> As always, entries for past contests are welcome (there are several to
> challenge you) and there are proposed contests that will start in the next
> few days. Visit http://brickbots.com to comment on upcoming contests or to
> propose your own! The last contest, and the current one, are more
> enginering challenges, but there are some interesting control problems
> proposed as well, so check them out.
>
> Thanks to everyone who participated, and good building!
>
> Rich
>
> Rich at brickbots dot com
I don't have the time to work on this, but I see a relatively simple way to do
this that might work well.
Build a column to stack all 3 cans into. Place 3 "spikes" roughly dead center
at each can, the RCX powers a bar that moves the spikes in to dent the cans,
then retracts.
Put the RCX on top of the stack supported by some beams that connect to a
4x4 plate sitting on top of the top can. Add as many pieces as possible from
one RIS set (or if you want to use "external" pieces, add a ton of boat
weights) to the framework the RCX is on. The RCX controls another motor that
pulls a pin, releasing the weight of the stack onto the cans.
Net time to start crush - tenths of a second at most - first motor spikes cans,
retracts spikes. Next motor releases the pins holding the weight stack, and
the weight takes over from there.
The question is whether this would be faster than a cage with one end that is
pulled down by multiple motors (like a trash compactor).
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Message has 1 Reply:
 | | Re: Rope Climbing and Can Crushing at BrickBots.Com
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| (...) [SNIP] (...) Good idea, but the rules specify that the robot can not start with a store of human provided potential energy (Aside from the batteries in the RCX if you want to be technical). The large weight waiting to drop would be a bunch of (...) (24 years ago, 13-Feb-01, to lugnet.robotics)
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Message is in Reply To:
| | Rope Climbing and Can Crushing at BrickBots.Com
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| Hello All, On Friday February 9th, 2001 the Rope Climbing Contest at BrickBots.Com finished with three completed entries and one standout winner! The contest objective was to build a LEGO robot to go up and down a length of rope as quickly as (...) (24 years ago, 12-Feb-01, to lugnet.robotics)
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