Quote:
Originally posted by Jnadke
For people lacking knowledge in physics, here's what this picture is saying:
Let's assume STP conditions, so the air pressure outside is 14.7PSI. Now, I'm also assuming that plate is 1 square foot. This is 144 square inches. Lastly, I'm assuming the table weigh 50lbs.
144 ( 14.7PSI - X ) = 50 lbs
X = 14.3PSI
All this picture says is that they are providing enough suction to reduce the pressure between the plate and the table to less than 14.3PSI. Nothing more, nothing less.
I'm not trying to bash your team or anything, all I'm saying is you're running the wrong test. Robots aren't going to lift upward, they'll push sideways. It doesn't matter if your robot can suck all the air out until it is a near-perfect vacuum, if your plate is just aluminum making contact with the polyethylene, with a coefficient of 0.1, any robot with 120lbs of torque can push you off the ramp.
I'm very impressed by the mechanism itself though. It looks very well engineered. What size cylinder are you using to suck the air out?
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ARRRRRRGGGGHH!!!!!!!!!!!!!!
This wasn't really a test, this was just showing stuff. The robot isn't ment to push upwards, the robot goes up so that the plate can come down to the ground.
The pneumatics I'm unsure of right now [I'm sick, so my memory is "bleh"]. Matt should know though.
[EDIT]
Quote:
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guys...its a joke ok...this is the off-season and there is no need to get into the legistics of a suction cup....nor is there ever a need to stifle a team's accomplishments...this picture was obviosly created out of sheer fun and youre all turning this into a physics lesson....which i dont think it was ever inteded to be...chill out have fun
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Thank you, and he's correct.
I'm not a genius in physics, so I might be wrong.