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#1
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Re: Best Way to Shoot the Balls??
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#2
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Re: Best Way to Shoot the Balls??
well they give us those super cims(thats wat our team are calling them) anyone actually know the names of those motors. Those things could probley power a scooter. But a double belt system working on one of the motors or a one belt up inside a large barrel it would be fast accurate and easy to feed, with very little fear of jamming.
Last edited by Seekthematrix : 08-01-2006 at 16:08. |
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#3
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Re: Best Way to Shoot the Balls??
If you do a two-wheeled shooter (or two belt or whatnot), you could run the wheels at different speeds to put a backspin on the ball. Not all spin has to be like a spiraled football.
Making sure you get your wheels back up to speed before putting another ball it will be huge. High RPM and low torque wheels will slow down. Who's taking a field trip to a batting cage? |
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#4
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Re: Best Way to Shoot the Balls??
I see no reason why you would need to shoot quickly if you have an accurate launching system. A barrel is probably necessary though. In my opinion, a pneumatic system would work best. There's less chance of unpredictable velocity... maybe. I donno though. I'm not the mechanical type. I just throw out ideas.
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#5
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Re: Best Way to Shoot the Balls??
it seems that most ppl are toying with the softball pitcher idea to shoot that balls. which i think is a very good way of doing so but how is everyone thinking how u are going to get the balls from ur holding area to the wheel to shoot without over loading ur gun or shooter or w/e u want to call it.
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#6
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Re: Best Way to Shoot the Balls??
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#7
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Re: Best Way to Shoot the Balls??
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#8
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Re: Best Way to Shoot the Balls??
my dad had some awesome ideas. I just wonder about jamming. Is it possible that a pile of balls may interfere with each other's ability to load? Kind of like how 2 balls may get stuck in a funnel and neither actually falls into the hole that is designed to fit one? If that is unclear, sorry I'm not the best person at explaining things.
Is probably best for the shooters if the balls are stored single file to prevent jamming. Boy, I want to go present all my ideas to my old school's team, but as an alumni(us) (which is singular?) I want to leave all the creativity to the students. I just hope they ask me for ideas =). BTW. if anybody does not want to use baseball-style guns to fire, I experimented with a scaled down catapult made out of lego. It uses a couple elastics (the more elastics/springs, the more stored energy), to store energy, and the accuracy is surprisingly good. I was able to score little blocks of lego in the 1 foot diametre lego basket from approximately 2 metres away at nearly 100% accuracy. However, there was some awesome recoil from that thing. Last edited by Kelvin Ng : 10-01-2006 at 22:59. |
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#9
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Re: Best Way to Shoot the Balls??
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#10
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Re: Best Way to Shoot the Balls??
One of my teammates had the idea to have two spinners (like in old Hot Wheels tracks) in the barrel to accelerate the ball and prevent spin from killing accuracy.
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#11
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Re: Best Way to Shoot the Balls??
Actually a spin on the ball will improve accuracy, probably backspin or spiral would be the best. In baseball the erratic behavior of a knuckleball pitch is due to the fact that it has little or no spin. It has to do with turbulence of the air around the ball, but since I don't use that stuff at work (and its been a LONG time since I was in school) I am unable to regurgitate any specific details.
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#12
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Re: Best Way to Shoot the Balls??
Really? I assumed that, if you spun the ball one way, it would veer off to one side once out of the barrel. Or you could make a long barrel, which would have problems of its own. Maybe it was my analogy at one meeting that the balls were like musket balls. Maybe I just need more sleep.
Last edited by Eria4044 : 14-01-2006 at 11:03. |
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#13
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Re: Best Way to Shoot the Balls??
I agree with Eria, because when you think of spin on something like a football, that helps to prevent different faces from being on the front, and thus pose different amounts of drag, causing the ball to tumble even worse. In the case of one of these balls, it is unclear if it will act like a baseball, because these have far less mass per unit of volume, and thus when accelerated have less momentum keeping them going forward. As the physics aren't totally clear, I asked my physics teacher about it, and he said to stay away from spin on this kind of ball. He didn't see the exact ball though, and I think the most definitive way to know how the ball will react to spin is to mock up a shooter and try it, which is what my team hopes to accomplish this weekend, among a million other things.
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#14
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Re: Best Way to Shoot the Balls??
Is there a limit to the amount of force we are allowed to have stored in a spring on the robot? or does the projection of the ball by that method just have to follow the 12m/s rule?
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#15
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Re: Best Way to Shoot the Balls (Power?)
Has anyone figured out how much power it will take to keep a softball-style shooter going? Seems like all that freewheeling would kill the battery.
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