Subject:
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Re: Results for Aluminum Can Stacking Contest at BrickBots.Com
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 1 Dec 2000 16:45:01 GMT
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Viewed:
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864 times
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In lugnet.robotics, John Barnes writes:
> That first place machine - Wonderful! My congratulations.
>
> And a great scheme Rich. It is often a lot more difficult than it looks to >make mechanisms as complicated as this work properly.
[SNIP]
> When I first got my RIS a year or so ago, I decided to build static
> "machines" as opposed to "robots" or other mobile devices initially. (The
> code is so much easier to debug if the the thing doesn't run off into the
> corner and hide every time you hit the run button!)
I have found that mobile robots, and stationary 'machines' are very
different design challenges. A bit over a year ago I had made all sorts of
mobile robots and found myself in a rut of building certain structures and
units over and over. At the time I had never made a stationary robot to do
something, so I built a playing card sorter (this was the inspiration for
the current contest). Working with cards was a big challenge, and being a
programmer by trade, I needed more work on my building skills than my
programming.
> I finally managed to build a machine which would take a deck of cards which
> had been randomly "shuffled" so that some cards were face up, other face down
> and output them as a deck which were all face down. It turned out to be a lot
> harder than I had imagined.
> The only non-Lego bits I had to use were lots of grocery store bought
> rubber bands as conveyors for the cards as they passed through the machine.
> The most intriguing part was the mechanism to take one card at a time from
> the stack in the "in" hopper.
I would love to see any pictures you have, I had a very difficult time
getting my sorter to pull one card at a time, and I am dealing with the same
issue again now. Turning over the face up cards, now that seems like it
would be fairly difficult!
> Might I suggest a project like this for some future contest?
> JB
Of Course! There is a facility to post new contest proposals at
BrickBots.Com, I would love to start a contest about every other week and to
have a good mix of different types of challenges, so I will need any ideas
people have.
Rich
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