Subject:
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Re: Pictures of SMART's robot display at Crossroads
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Newsgroups:
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lugnet.org.us.smart
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Date:
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Wed, 26 Apr 2006 17:43:06 GMT
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Viewed:
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3957 times
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In lugnet.org.us.smart, David Schilling wrote:
> There was so much going on that it was hard to take it all in!
Thanks for writing this up and posting the pictures, and the video! Really
wonderful stuff. I love how many different ideas people can implement - the
screws are nice, but I think my personal favorites (after a *quick* browse - so
much there!) are the train loaders and unloaders. I've always wanted a nice
*big* step feeder, and hanging the steps below the driving shafts does a nice
job of that. And the unloader "conveyor" with axles seems to work really well,
at least in the video. You guys used a lot of "drive chains" that are *not*
based on the normal LEGO chain link, which is neat, although seems
parts-intensive.
> Trains zipping back and forth...
I sympathize with the problems exactly controling the trains and positioning
them - we had this problem a lot at BF last year as well, although I think both
Steve & I used different solutions from your (in mine and I think Steve's, the
train car always overshot, and then moved back into position - it took a little
longer than your method seems to have). How exactly did you control the train
(any code fragments you want to share)?
Also, why did you decide to use two RCX's for the train? I would think you
could use just one (OUT_A driving the train itself, with OUT_B & OUT_C availible
to run the loading or unloading mechanism, and you only need two sensors for
train position (which could be ganged together I'd suspect). This way, you
wouldn't have the problem with track isolation, for instance.
> and of course balls bouncing and rolling everywhere!
It's *amazing* how those little balls can get *everywhere*, isn't it? On a
related question, which GBC modules gave you the least problems? Which were the
most problematic, and why? I loved the waterwheel module, particularly the lift.
> Right in the center of our display was an NXT robot
> built by Gus Jansson.
So do you think you can remove a bunch of the tape lines from the Contraption
in the future, doing more dead reckoning and only using tape marks at the end
stations to do final positioning? The NXT module looks like a very nice
"crab-like" robot. Did the public notice it as "different" at all? I've noticed
at least some public interest at places like tghe Orlando LEGO store, and was
wondering how much it might have percolated into the public knowledge base out
by you guys.
> And the following students of Lakeside school also participated:
> Jennifer G.
> Lennart J.
> Tess R.
> David I.
> Rahul B.
> Gabriel P.
> Charles P.
> They're ball contraptions were absolutely amazing!
And personally one of the coolest things I think - *anybody*, of any age, can
really contribute! I think it's fantastic you guys sewt up an event that was
able to incorperate so many school-age folks.
> and deserves a round of applause!
Well you guys are getting it from me - fantastic job, and a great write-up!
Thanks!.
--
Brian Davis
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Message has 1 Reply:
 | | Re: Pictures of SMART's robot display at Crossroads
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| (...) Well, the LEGO chain link is pretty weak and flimsy stuff! Great for a static model of a motor cycle, not so great if you want to apply a lot of force. So I've been trying to come up with different ways to make stronger chains. The biggest (...) (18 years ago, 27-Apr-06, to lugnet.org.us.smart)
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Message is in Reply To:
| | Pictures of SMART's robot display at Crossroads
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| On Saturday SMART put on a terrific robot display at Crossroads Shopping Center! This was a combined Crate Contraption and Great Ball Contraption. There was so much going on that it was hard to take it all in! Trains zipping back and forth, ball (...) (18 years ago, 25-Apr-06, to lugnet.org.us.smart)
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