Quote:
Originally posted by frumious
I'm fairly sure using the bernoulli principle would fall under the 'custom pneumatic components' section, anyway. I think the only way to make a vacuum legally involves actuating one pneumatic cylinder with another, creating a vacuum air connection of the cylinder being moved. If you attach this to a decent suction cup, you should be able to form a vacuum between that and any surface.
Tyson
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There are at least two other legal ways of creating a vacuum, though one only applies to suction cups. The first is simply hooking tubing up to the compressor inlet. Of course this makes it difficult to pressurize our pneumatic system at the same time, but it works and is legal. The pneumatics guy at the LA Kickoff said you should get about 24 inches of mercury vacuum from the compressor.
The other way is to push down on a suction cup until it's flat. Push down on the cup with a ring and then pull up on the center. How hard a vacuum you get depends on how hard you pull. But there isn't much volume so a slight leak could be trouble.