Subject:
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Re: GBC- Magnetic Ball Separator
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 20 Jan 2007 23:19:24 GMT
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Viewed:
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3419 times
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In lugnet.announce.moc, Kevin McClure wrote:
> I just finished my new module, a magnetic ball seperator. There was a
> discussion a while back about building a module that could detect a single
> 'tracerball' in the ball flow. The red and blue basketballs were ruled out,
> because the light sensor had too high of an error rate with detection. Zamor
> spheres, while easy to detect, jammed most of the modules that would be in a
> GBC. The Golden Egg from one of the Harry Potter sets seemed like the best
> choice, but no one figured out how to reliably detect it.
> By putting six train couplers and the magnets around a medium pulley wheel,
> attaching that to a 9-volt mini motor, and placing that over the ball stream, it
> relaibly pulls out the magnetic ball.
> The module that feeds the separator mechanism is equipped with a counter, and
> using the timer on the RCX it can display:
> 1. The total number of balls.
> 2. Ten laps worth of:
> a. How long the magnetic ball took to go around.
> b. How many balls (approx.) were in the lap.
>
> I have a simple video on youtube <http://www.youtube.com/watch?v=468vVNAhvKM>
> and some pictures on webshots
> <http://home-and-garden.webshots.com/album/554321008vqaEdx?start=36>.
>
>
> -Kevin
You may be able to kick the motor entirely. Have you tried embedding magnets in
the floor and walls, close enough to attract, but not so much as to grab the
ball? You could increase the slope to help with this also. :-) If the ball is
magnetic rather than just metal, you could put magnets facing the other way, in
the other lane, to repel the golden egg.
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Message has 1 Reply:
 | | Re: GBC- Magnetic Ball Separator
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| (...) I thought of this immediately, specificly adapting the light sensor / train magent trick to try to get the dragon's egg to register. Alas, I've not gotten it to work (*yet*...), as the ball is not actually magnetic, but just has a piece of (...) (18 years ago, 21-Jan-07, to lugnet.robotics)
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Message is in Reply To:
| | GBC- Magnetic Ball Separator
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| I just finished my new module, a magnetic ball seperator. There was a discussion a while back about building a module that could detect a single 'tracerball' in the ball flow. The red and blue basketballs were ruled out, because the light sensor (...) (18 years ago, 19-Jan-07, to lugnet.announce.moc)
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