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1726 Prototype Testing
Here's a short video of our prototype mechanisms in use.
http://www.youtube.com/watch?v=LDvo2uY7dcU You can also see some picture going up at: http://photos.project1726.org Comments, questions, suggestions appreciated! |
Re: 1726 Prototype Testing
very nice, it goes up really high
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Re: 1726 Prototype Testing
It goes a little higher when you hold it down (like it will once the last component is finished)
http://www.youtube.com/watch?v=G9y-LhHRAHw |
Re: 1726 Prototype Testing
oh man that catapult is BEAST
what did you use to power the catapult? I cant really tell, but is ure robot within the 28 by 38 requirement ? |
Re: 1726 Prototype Testing
Best one I have see so far! That's great!
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Re: 1726 Prototype Testing
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Right now we're working on lowering the air consumption (right now a single shot drops our pressure from 115psi to about 80psi...) And yes, I believe it is within the limits... However, this is a culmination of 2 prototypes, a mechanism mounting bracket, and last year's robot. The real thing will (hopefully) be much nicer |
Re: 1726 Prototype Testing
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sorry Im a nub |
Re: 1726 Prototype Testing
basically when the catapult is fully retracted, the cylinder sticks out 3 in. Before we shoot, we hold down the ball (from the top, we still have to make that part) and open the valve. Air from the tanks fills up that 3in. and we wait until it is time to fire. When we fire, we remove the top piece and the air inside the cylinders expands rapidly, launching the ball.
Maybe I should make a quick diagram... |
Re: 1726 Prototype Testing
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yeah a diagram might help... |
Re: 1726 Prototype Testing
Think of it like a spring, but instead of energy being stored in the coils, its stored in the cylinder with the air. Only reason that it sticks out 3in is so the pressure can build, storing the energy.
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Re: 1726 Prototype Testing
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do u have to program the bore to protrude 3 " out, or do u mechanically set block it from full retracting (Im guessing the 2nd...programming a bore doesnt seem probable) haha |
Re: 1726 Prototype Testing
Are you at all worried about running out of air?
I think you might hurdle too fast (:D ) and drain your tanks. |
Re: 1726 Prototype Testing
actually, yes, we are very worried about running out of air! Right now we lose about 35-40psi per shot, and it takes ~25-30 seconds to reload... Of course, you don't have to shoot it at 115psi, but we still plan on exploring different ways to conserve air.
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Re: 1726 Prototype Testing
Well, you could start by removing all the other pistons.
Use servos to shift, and a motor to lift the loading forks. Pressurizing your tanks before every match might help maximize your air. |
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