Subject:
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Re: Single acting pneumatics with spring return
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Thu, 7 Mar 2002 00:04:17 GMT
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Viewed:
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1448 times
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> Its really just the opposite of compressing air.
True, but there is one notable difference, as others have pointed out
before:
When compressiong air, the pressure difference is limited only by
implementation details. The pressure inside the tank usually is not just
slightly higher than outside, but multiple times the outside pressure.
When removing air from the tank, the theoretical limit for pressure
difference between inside and outside is the atmospheric pressure itself.
And real implementations in the price range we are talking don't even get
near that, so the amount of energy you can store by sucking air out of an
air tank is very limited.
> If I pump most
> of the air out to start, the robot can climb about 6 steps before
> needing a recharge. I suppose it would work without the air tanks, but
> not as well:)
I suppose it would work even better if you could figure a way to use
pressure instead of vacuum. But that may not be feasible ...
Greetings
Horst
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