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#1
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Re: ball "fuel" hopper sorter
if you look at hoppers of professional paintball guns that might be a good idea
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#2
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Re: ball "fuel" hopper sorter
Take a look at some of the Ri3D teams, specifically the Greenhorns, and how they did it. Many had to solve hte same problem.
I'll be honest, we're in a prototyping stage of 2 shooters, and a hopper that is a pyramid in the center, causing balls to go either right or left, with agitators on both so we don't get a jam. Lowers our capacity a bit, but the speed might make for it. Prototype! Always prototype, regardless how crazy! |
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#3
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Re: ball "fuel" hopper sorter
I really think the best way to do this is to not have to sort your hopper into a single feed. In 2009, the last volume scoring game, lots of teams trapped themselves into this paradigm early on and found their scoring potential harshly limited.
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#4
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Re: ball "fuel" hopper sorter
Many of those teams in 2009 did a sort of spray shoot that didn't need to go very high in the air if at all. This is a completely different size and material game piece that needs quite a bit of accuracy to get into the goal. Introducing them in a reliable and consistent manner is going to improve accuracy greatly.
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#5
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Re: ball "fuel" hopper sorter
Quote:
And, many teams did shoot high in the air, they just converted their shooters to shoot down so that the ball landed in the goal sooner after the shot was taken. Accurate repeatable arc shots with multiple ball wide shooters were clearly demonstrated, just suboptimal for that game. Don't knock it before you prototype it. If your shooter "wheels" and/or backboard are a uniform thickness / speed / etc, isn't the shot consistent across the shooter width? |
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#6
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Re: ball "fuel" hopper sorter
Quote:
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#7
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Re: ball "fuel" hopper sorter
Impellers like those used in paintball guns are absolutely a good idea to prototype, but don't come in with the assumption that because it's the most effective loader for paintball, it must also be the most effective loader for robots this year. A big difference between paintball hoppers and robots this year is the size of the balls relative to the container.
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#8
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Re: ball "fuel" hopper sorter
Do you mind providing an example or two of teams that did NOT have to sort their hopper into a single feed and were successful? I'm just not quite sure if I understand your point entirely.
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#9
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Re: ball "fuel" hopper sorter
67, 971, and 111 are solid examples to start with.
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#10
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Re: ball "fuel" hopper sorter
Quote:
I think his point was that once you commit to a singe stream shooter, you commit to a bottleneck mechanism, and if you skip the single width shooter, you may never need a bottleneck. |
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#11
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Re: ball "fuel" hopper sorter
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67 was a two ball wide shooter, but balls that came up in the middle shot just fine. 228 was not the greatest robot, but I'm very familiar with that example - a 3 inch diameter drum across the entire width shooter with a lexan hood allowed for those kind of shots. Dumpers that had more of an active "shot" out rather than a slower puke could be argued to be this kind of shooter - 47's rebuild, 254 / 968, etc. come to mind. 100's shooter is pretty much perfect for this, but their hopper did divide into two single file channels (I'm not sure that was necessary, but that's how it was). The key design details tend to be the use of a roller of uniform diameter rather than spaced wheels, and the use of a curved backboard made from a single piece of plastic rather than separate "rails" used on some hooded shooters. |
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#12
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Re: ball "fuel" hopper sorter
I don't have any useful answer or suggestion here, other than I've just decided my personal term for this robot system is now "fuel injector".
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#13
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Re: ball "fuel" hopper sorter
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If I recall correctly, the shift from shooters to a different archetype was known as vomit mode in some places of the internet. Just wanted to give newer people a different search term. On second thought, use that term very wisely... |
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#14
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Re: ball "fuel" hopper sorter
The hoppers have a blender in them use a mini cim or bag motor to attach a verticle shaft and attach pieces of Lexan or metal and you have yourself a jam free hopper
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#15
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Re: ball "fuel" hopper sorter
This is a good approach to start with, but this is absolutely not the kind of thing you can be assured will be "jam-free" until you've thoroughly prototyped the exact geometry you will use on the competition robot.
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