Subject:
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Re: Pneumatic Pick and Place Robot - Pictures
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 13 May 2004 18:51:43 GMT
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Viewed:
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3589 times
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In lugnet.technic, Mark Bellis wrote:
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At last - pictures of my 10-step Pneumatic Pick and Place robot!
More pictures (once moderated) at:
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=82738
The robot uses 6 large and 2 small cylinders and 9 switches. The pneumatic
circuit consists of a 3-stage flip-flop and an Exclusive-OR gate. There are
four functions: grab (with rear switch bank in parallel), wrist (90 deg
rotation), extension (by 1 cylinder length) and elbow (90 deg rotation).
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Very nice Mark. Great to see more pneumatic devices being published.
I’d love to see a schematic diagram for your circuit. Any chances of that?
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The robot collects 2x10 bricks from the chute and moves them to the tan
coloured box. All you have to do is supply enough air. That’s a struggle,
even with 3 pump cylinders in each hand - your hands soon get tired! I
sometimes use a car tyre air compressor set to 25psi - noisy but less effort
and twice as much air as 6 hand pumps.
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Yes, we need to work on better LEGO based compressors. I’m starting to look
like Popeye with bulging forearms due to pumping large pumps so much.
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I built the robot in 1996 and it might do with an update, such as using flex
tubing as much as possible to reduce the balloon effect and help keep the
tubes tidy.
PLMKWYT
Mark Bellis
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I like it a lot! Great work.
Kevin
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