Subject:
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Re: The Great Ball Contraption
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 20 Jan 2005 12:27:14 GMT
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Viewed:
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4240 times
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In lugnet.robotics, Jordan Bradford wrote:
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I got super-motivated and built myself a
ball pump last night.
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Wow, nearly untouched territory... pumping Steve’s... oh, never mind.
On a more pratical note, does your pump meet the height requirement for the GBC?
I’ve got two ball pumps working, but both have the same problem - allowing room
under the hopper for the piston mechanism makes it hard to have a deep hopper
(and I’d really hate to use a “high hopper” for the ball pump that has to be
filled from the standard input via another mechanism).
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it’s jam-proof if the marbles come once every
second or so.
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Mine has no problem with jamming, but occassionally problems with “clotting” in
the hopper starving the pump itself. Can yours handle a crate of balls dumped
all at once? I wonder what the ultimate percentage of “continuous output” vs.
“batch output” modules will end up at.
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keeping tension in the tread links is proving
difficult. Any ideas on how to do that?
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If you need constant tension, one way to do it is tensioner. A third gear in the
chain, that can be moved in and out changing the shape (& therefore length) of
the triangular chain path. This doesn’t have to be hand-tuned either - use a
idler gear on a small free-swingin arm that is held in tension by a weight or
rubber band.
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One suggestion for people: I don’t like mystery
mechanisms.
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Well, one of the ball pump designs I’ve built can have one side of the
mechanism built out of clear panels... that is, if I could *get* any of them.
After I built it, I found S@H had run out, and Bricklink has (currently) *one*.
Sigh... Also, most of my designs are ending up rather skeletal, due to the lack
of pieces left for building.
--
Brian Davis
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Message has 1 Reply:
 | | Re: The Great Ball Contraption
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| (...) I don't know if it fits into the standard or not. I didn't plan on using it as my first device, anyway. I'm going to build a simple large hopper for the previous person's contraption to feed into mine, and then I'll have a feed chute or (...) (19 years ago, 21-Jan-05, to lugnet.robotics, FTX)
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Message is in Reply To:
| | Re: The Great Ball Contraption
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| What's funny is the other day I was thinking of building a marble machine with LEGO. After reading about this contraption system, I got super-motivated and built myself a ball pump last night. I only spent a few hours on it, but I think I have it (...) (19 years ago, 20-Jan-05, to lugnet.robotics, FTX)
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