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#31
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Re: Pneumatic Ball Puncher
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#32
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Re: Pneumatic Ball Puncher
With regards to allowing the pressure to evacuate, why bother? Just leave the top of the cylinder disconnected, and allow the weight of the rod to return it to rest when the solenoid is fired.
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#33
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Re: Pneumatic Ball Puncher
I think some people might want to look at some of the soccer kickers from 2010. Many of the kickers that year were surgical tubing assisted by pneumatics. Kicker was drawn back and latched with pneumatics which stretched the surgical tubing. Then the solenoids were actuated in the other direction and then the latch was released. It was discovered that lots of energy was stored and released this way. So I tend to agree that there is a possibility that a punch using pneumatics could end up on Einstein.
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#34
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Re: Pneumatic Ball Puncher
It was legal in 2010 and a fairly popular method of powering kickers.
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#35
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Re: Pneumatic Ball Puncher
well my team original idea was to use pneumatic but we simply could not get the piston to extend fast enough to push the ball far enough. We even called are pneumatic guy to ask him if he had any cylinders that could open with such speed and force but he told us that he could not think of any way to do it. So i would say that to my knowledge there is no way of using pneumatic to shoot the ball in to the high goal, however it may be possible in the low goal.
Your best bet is to prototype some different shooters and pick the best one ! |
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#36
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Re: Pneumatic Ball Puncher
I am continuously surprised by the discouraging comments, especially by adults and mentors on this forum. FIRST is about encouraging these students to TRY things, think outside the box, see whats possible, yet this thread is full of the opposite.
There is a big difference between "we have not been able to figure out how to do it." and "it's impossible" or "don't even bother." Let's be constructive not discouraging. |
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#37
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Re: Pneumatic Ball Puncher
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Right now, we're putting air punches on a back burner pending the outcomes of other ideas. |
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#38
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Re: Pneumatic Ball Puncher
If you are looking at a linear "punch" (actuation), your best bet (if you intend to use pneumatics) will likely be to use a wide bore piston to reset a highly tensioned plunger mechanism on guide or track. Just a thought.
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#39
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Re: Pneumatic Ball Puncher
Brandon et al,
During inspection, launchers may have to demonstrated for "dry firing" to see if they are in fact safe with no ball present. Having no external hard limit for cylinders quite frankly scares me. While the working pressure is only 60 psi, a cylinder can impart quite a bit of force on the piston and the end assy with no system resistance. I have seen enough catastrophic failures to worry about this design choice. Please prototype with extreme safety in mind. |
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#40
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Re: Pneumatic Ball Puncher
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#41
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#42
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Re: Pneumatic Ball Puncher
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125 psi is the working pressure at which integrity with pressure is guaranteed. It does not relate to mechanical failure of the device with no load. |
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#43
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Re: Pneumatic Ball Puncher
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#44
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Re: Pneumatic Ball Puncher
One method of shooting using pneumatics.
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#45
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Re: Pneumatic Ball Puncher
can you Explane how this works
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