Subject:
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Re: MOC - Small Pneumatic Biped Walker
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Mon, 16 Jun 2003 00:47:06 GMT
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Viewed:
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716 times
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In lugnet.technic, Paul Krieg wrote:
> In lugnet.technic, Kevin L. Clague wrote:
> > The other day I was given a challenge to make a small biped using small
> > pneumatic pistons.
> >
> > Normally I don't use small pistons in combinations with switches, because the
> > pressure must be increadibly high for a small piston to flip a pneumatic switch
> > (something like 30 PSI.)
> >
> > Many of my pneumatic switches are well used, and don't resist flipping as much
> > as new ones, so I grabbed the four easiest to flip switches that I had.
> >
> > Even with four easy switches, I still found that it took a lot of pressure to
> > flip the switches. So I ganged two pistons per switch, this made things work
> > better.
> >
> > http://www.brickshelf.com/gallery/kclague/pendmatic/p6120001.jpg
> > http://www.brickshelf.com/gallery/kclague/pendmatic/p6120002.jpg
> > http://www.brickshelf.com/gallery/kclague/pendmatic/p6120003.jpg
> > http://www.brickshelf.com/gallery/kclague/pendmatic/p6120004.jpg
>
> Hi Kevin,
> What can I say? Yet another amazing creation. You have a pneumatic control
> circuit in there somewhere, I think. I know what you mean about the small
> pneumatic cylinders needing such high pressure to move a switch. The engine I
> built following Eric Shrader's post over came this problem in the same way.
> Instead of having 2 cylinders at 90 degrees and 2 switches, it has 2 cylinders
> at 180 degrees and 1 switch. I have yet to build my first walker but I enjoy
> seeing all of them. It seems obvious to me that cog shifters would be the more
> challenging. Nice work in doing it with pneumatics, my favorite flavor!
Thanks Paul! You are always so kind.
The pneumatic control circuit is similar to one found in a two double acting
cylinder engine, except slightly different. It makes the walking pace more even
from side to side.
>
> Best regards,
> Paul
Kevin
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Message is in Reply To:
 | | Re: MOC - Small Pneumatic Biped Walker
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| (...) What can I say? Yet another amazing creation. You have a pneumatic control circuit in there somewhere, I think. I know what you mean about the small pneumatic cylinders needing such high pressure to move a switch. The engine I built following (...) (23 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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