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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Tue, 18 Jan 2005 02:38:18 GMT
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Reply-To:
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Geoffrey Hyde <GDOTHYDE@BIGPONDDOTNETDOTAUsaynotospam>
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Viewed:
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4627 times
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"Roy Nelson" <legoroy@telus.net> wrote in message
news:IAH1Kr.7vn@lugnet.com...
> In lugnet.robotics, Geoffrey Hyde wrote:
> > Would it be possible to get a closeup shot of the conveyor, and the
> > linkarm
> > assembly it feeds into with all those gears?
>
> Done. http://www.brickshelf.com/cgi-bin/gallery.cgi?f=112880
Nice work, eventually, I think you should get close-ups of each part the
marbles run through, I especially liked the mechanism you used to bring the
marbles up from the large antenna dish they collected at onto the conveyor
belt, while at the same time spacing them out a bit.
> > What I'd really like to know is how you interleaved the linkarms (which
> > look
> > suspiciously like 3-arm rotor blade pieces to me) so that they all shift
> > the marbles across without jamming up.
>
> On each axle I used four 3-long linkarms. The link arms are positioned in
> such a
> way that they never rub against eachother. I have made another link-arm
> passer
> that uses one 4-long linkarm per axle. The linkarms do rub slightly as
> they pass
> but I've been able to adjust it so that it does not catch.
I see - that sounds like a way to economize somewhat if you run out of
Technic Link Tread, as bricklink calls it. It is also a way to stop the
marbles from running into each other too much so that they start collecting
somwhere.
> > Do you think this assembly could be adapted to handle soccer balls and
> > input/output feeds?
>
> I did a quick test and they soccer balls do work. Overall I think soccer
> balls
> are easier to use than marbles. I have spent many hours finding and
> sorting
> marbles that have a diameter that is less than a 2x2 brick...but marbles
> have
> nicer weight and colour.
What you should do is find a way to handle oversized marbles too, either a
simple grading mechanism, or something that 'rejects' oversized marbles.
You could make a more complicated assembly that loops the marbles from one
hopper to another, and back again, all in a continuous never-ending flow.
Cheers ...
Geoffrey Hyde
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Message is in Reply To:
 | | Re: The Great Ball Contraption
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| (...) Done. (URL) What I'd really like to know is how you interleaved the linkarms (which look (...) On each axle I used four 3-long linkarms. The link arms are positioned in such a way that they never rub against eachother. I have made another (...) (19 years ago, 17-Jan-05, to lugnet.robotics)
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