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#16
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Re: Goalie Bots
I'm personally surprised to not see these goalies have tails and utilize the 20" extension. One of the worst things about a penalty shot in soccer is you have to stay on the line. In our case as long as your in contact with your carpet you could move much further into the playing field, thus cutting down the angles on the shot. If designed right, your blocker could be as far as 3 ft from the goalie line.
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Last edited by mwtidd : 04-03-2014 at 11:33. |
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#17
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Re: Goalie Bots
Unless a robot was purpose built for this specific task, I do not expect this functionality to be seen at all this year. Not really a "just have a" mechanism. This does not change that it is impossible for a robot to block the 10 point goal above the 1 point goal.
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#18
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Re: Goalie Bots
That's also a near impossible shot to make if a goalie is blocking as far as they can over. That shot would have to be shot probably within an inch or two (someone else can do the math if they want) to make it without hitting the goalie or the side of the goal. Setting up that shot will take time, which achieves the goalie's point, to take up your time so that you can't do as many cycles.
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#19
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Goalie Bots
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I think it would be possible to make one in that time with a little bit of hard work, it's a pretty simple set up with a little problem solving to make sure it's legal and stable. If you do get it done, please share, I'd love to see how it turns out. Eli2410 knows more about it though so he's the one to ask. Last edited by discobrisco : 04-03-2014 at 12:25. |
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#20
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Re: Goalie Bots
I'd say it depends a lot on how precise you can machine parts, how much time to work you have, how much weight you have to spare, and how quickly you can get supplies. If one of these four factors is on the bad end, I don't see it happening. If all of these factors are in your favor, you may be able to do this.
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#21
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Re: Goalie Bots
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Most of the time they had good driving to shut down 33. We had watched them in multiple matches drive very well and shut down a team and even alliance. With one ball out there, if a driver plays well it can really slow down an alliance. Its unfortunate for us in those matches that both us and alliance partners died a few times. I think a lot of people where surprised by the pick (Ranked 37 of 40) but after watching realized why we made the pick. |
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#22
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Re: Goalie Bots
Can't the 6" cylindrical projection upwards be on the 20" horizontal projection, thus covering the area above the 1 pt goal?
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#23
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Re: Goalie Bots
I don't see why not, but that would be a complex mechanism to make, and as far as I know no one has.
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#24
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Re: Goalie Bots
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An extension above 60 inches cannot be there as I believe the 1 point goal is not the goalie zone. Clever, but nope. |
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#25
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Re: Goalie Bots
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#26
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Re: Goalie Bots
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Q170 Q. Regarding possession of opposing alliance's ball: If a robot is attempting to score a 1-pt goal, if an appendage of a defending robot either a) holds the ball from dropping into the top of the goal or b) causes the ball to be "pinned" as it's pushed in the front goal, would it be illegal possession? A. Yes. |
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#27
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Re: Goalie Bots
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When we were considering a pure goalie, we wanted to exploit the fact that the rules actually don't impose any height restriction at the beginning of the match, so if you start in the goalie zone, the blocking post doesn't even need to be retractable, which means the vertical blocker can be pretty strong. We also designed a two-way horizontal linear elevator based on 118's 2011 robot, which would have easily been able to take the impact of a ball. However, the weakness we encountered was that the goalpost acted like a wrench, with a huge mechanical advantage. ![]() We stopped working on it around then because the mentors wanted to build a very different robot, but by then we had figured out that a blocker that could extend over the low goal is a major feature, and would mostly dictate the rest of the design. tl;dr In my opinion, extending over the low goal to block the ends of the high goal is a difficult feature to implement unless the entire robot is built around it [and even then, it wouldn't be easy]. EDIT: Ooops, I forgot to mention: team 1710 executed this beautifully, and because the axis of the hinge is perpendicular to the torque above, they can easily withstand the impact of a shot. Bravo to team 1710! Last edited by ohrly? : 04-03-2014 at 16:49. |
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#28
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Re: Goalie Bots
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#29
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Re: Goalie Bots
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![]() http://www.chiefdelphi.com/media/photos/39587 Last edited by samfruth : 04-03-2014 at 17:19. Reason: forgot to resize picture |
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#30
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Re: Goalie Bots
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