Subject:
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Re: Pneumatic Magic Presetnation Maertials
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Sat, 16 Aug 2003 12:45:08 GMT
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Viewed:
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239 times
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In lugnet.technic, Ross Crawford wrote:
<snip>
> >
> > Cool! Thanks for posting that. I enjoyed attending your presentation, although I
> > admit I didn't fully understand all of it right then. I think some studying of
> > the AND, OR, and the other type of OR (I forget what it's called- you can have
> > one or the other, but NOT both) would help me.
>
> That'd be XOR ;)
>
> And thanks Kevin for the PPT file, it's great!
>
> Although I do have one little query - on page 4, you say the cylinders "Expand
> faster than they contract" - is this correct? I thought it would be the other
> way round - they contract faster but with less force?
>
> Anyway thanks for all your diagrams & explanations - has made it much
> clearer..... I think ;)
>
>
> ROSCO
Rosco,
The expanding and contracting behavior is described by Pascal's law that says
that the force exerted by a piston is the pressure (pounds per square inch)
times the surface area (square inches). The area in this case is the area of the
face of the piston head. The area of the face of the expand side of the piston
head is larger than the contract face of the piston head because the shaft that
attaches to that face.
Less area, less force,,,,,
Kevin
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Message has 1 Reply:
 | | Re: Pneumatic Magic Presetnation Maertials
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| (...) Ummmm yep, thats what I meant - the contract side is smaller so less force, but wouldn't that also mean it contracts faster because it needs less air? Just like the small cylinders expand/contract much faster than the big ones because of the (...) (21 years ago, 18-Aug-03, to lugnet.technic, lugnet.robotics)
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