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 00:41:49 GMT
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Viewed:
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238 times
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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!
Best regards,
Paul
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Message has 2 Replies:
 | | Re: MOC - Small Pneumatic Biped Walker
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| (...) Hi Paul, I use a electronic schematic style when drawing out my pneumatic circuit designs these days. The combination of a piston that is linke to a pneumatic switch is simply a box, with X and C on the left edge, representing the eXpand and (...) (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | MOC - Small Pneumatic Biped Walker
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| 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 (...) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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