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-   -   Is creating a pneumatic shooter realistic considering the pressure limit? (http://www.chiefdelphi.com/forums/showthread.php?t=125389)

FS Robotics 28-01-2014 17:56

Is creating a pneumatic shooter realistic considering the pressure limit?
 
We were wondering if it would be possible to use the limited pressure allowed along with mechanical advantage to create a shooter. Has anyone tried? Or are our limited pneumatics just not powerful enough to shoot the ball effectively?

Thanks!

cjl2625 28-01-2014 18:00

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
Yeah it's certainly possible, some teams have done it.

For example, 1212 posted a prototype pneumatic catapult here:
https://www.youtube.com/watch?v=YDuA0Ed2JmU

waialua359 28-01-2014 18:31

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
Its very possible.
There are many teams posting their prototypes and it doesnt hurt to try some ideas that you folks may have.
If it doesnt work, tweak a variable here and there, and make it work.:)

Jarren Harkema 29-01-2014 00:02

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
We can get the ball into the high goal with one 7" stroke, 2" bore cylinder. It just requires finding that sweet spot of your pivot point, as well as the length and shape of your throwing arms. Having an air tank or two on the low pressure side might also help.

pfreivald 29-01-2014 00:05

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
It depends on what you mean by "shooter".

As a layup? Absolutely.
From four-eight feet? Quite probably.
From the truss? Probably not. But maybe, given the sheer ingenuity of FIRSTers.

lgphoneeric 29-01-2014 00:18

By using 2 pneumatic pistons on our prototype (similar style to 1212) we have gotten the ball through the high goal at 20+ feet.

pfreivald 29-01-2014 00:26

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
...like I said!

one4robots 01-02-2014 18:19

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
Quote:

Originally Posted by FS Robotics (Post 1333817)
We were wondering if it would be possible to use the limited pressure allowed along with mechanical advantage to create a shooter. Has anyone tried? Or are our limited pneumatics just not powerful enough to shoot the ball effectively?

Thanks!


See this thread for video of 2530s pneumatic puncher shooter. In this initial test, we made the high goal from 5 feet. We have improved upon that...
http://www.chiefdelphi.com/forums/sh...d.php?t=124999

Cyborg Mustang 01-02-2014 18:50

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
It's certainly possible: many teams have posted videos of how they accomplished it. However, our team tried it and we tore the prototype in half from misjudging the variables. In conclusion, it's possible, but tricky.

Good luck! Just be careful! :)

Qbot2640 01-02-2014 20:08

Re: Is creating a pneumatic shooter realistic considering the pressure limit?
 
"Non-catapult" type pneumatic launcher:

http://www.youtube.com/watch?v=UK2f9lvskcQ

Three .75" dia by 12" stroke cylinders each with its own solenoid, but activated together.

We've consistently "scored" from a range of 9 to 15 feet from the goal with the same tilt angle and pressure. We're trying for a wide "sweet zone".

The key is to have the ball resting on the "plunger", rather than attempt to "punch".


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