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pic: Team 1717's PenguinBot 2008
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Re: pic: Team 1717's PenguinBot 2008
That thing competes like crazy. If you haven't seen 1717 in action, watch them on TBA.
2 regional wins and finalists against 1114, 217, 148 with the Poofs at their side. They were on fire this year. |
Re: pic: Team 1717's PenguinBot 2008
This was one of the most robust looking robots that i saw this year. i thought it was the most professional looking bot at nationals.
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Re: pic: Team 1717's PenguinBot 2008
Could anyone explain how they got that fast of a forklift built?
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Re: pic: Team 1717's PenguinBot 2008
I'm glad 1717 is getting some attention this year, as this isn't the first time they've made an outstanding bot. If anything, their bot last year was even better (one of the best ramp bots of the year, and it could score a couple tubes), pity it didn't attend the Championship.
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Re: pic: Team 1717's PenguinBot 2008
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We built a simple winch set-up that used the fisherprice motors with the KOP fisherprice gearboxes. We evaluated the motor performance under load lifting different amounts of weight. We measured the current under load and compared this with the motor power curves. We then decided on a "safe zone" in which we felt comfortable operating our motors. This was between max efficiency and max power. We then used a basic physics analysis, W=FD and P=W/t, using the predicted load of the ball and lift combined. Using this information and the data collected from our tests, we were able to determine the most effective transmission and winch diameter combination. We actually played it safe with 64:1. We could have used 48:1 which would have made it lift even faster and still been within the limits of our "safe zone." We decided, however, to be conservative and stick with 64:1. We ran this forklift up and down hundreds of times and played matches all the way through finals at two regionals and the championship and never had a motor problem. We bought 10 spares just in case and never had to replace a motor. The fisher price motors are really quite amazing if they are used under non-stall conditions and at the sweet spot on their power curve. Finally, our lift had a built-in ratchet that did not allow the motors to back drive. Hope this is somewhat clear and informative Amir |
Re: pic: Team 1717's PenguinBot 2008
I'd have to say that this is one of very few robots I've ever seen who built to a theme (robot resembles a penguin) and didn't compromise effectiveness or success. Btw, do you have a part number for the BB transmissions you used on the FPs?
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Re: pic: Team 1717's PenguinBot 2008
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Re: pic: Team 1717's PenguinBot 2008
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Re: pic: Team 1717's PenguinBot 2008
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From my experiences with the banebots, you absolutely need to make sure the output shaft stays in alignment. If not, the final stage of planets will be unaligned and seize up. I would also stay away from the higher reductions of the gearbox (256:1) as they can damage themselves under stall conditions. |
Re: pic: Team 1717's PenguinBot 2008
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MP-42064-550 64:1, 42mm Planetary Gearmotor, RS-550 Motor |
Re: pic: Team 1717's PenguinBot 2008
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Yeah, we brought many replacement fp's for our winch to SVR and to Atlanta, but we never had to change them out. We had never used fp's before, and we read all sorts of horror stories about them blowing on CD. They are great motors to work with if you use them properly. |
Re: pic: Team 1717's PenguinBot 2008
I realize the thread has somewhat digressed, but I just wanted to point out how much I loved this bot and team. Working with them and playing against them in Atlanta was so much fun. One of the friendliest drive teams/coaches I've ever had the pleasure of working with, and a phenomenally designed robot to boot. Seeing you guys coming up at the last second to descore our place in the Galileo elims was one of the moments this year I remember most :P
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Re: pic: Team 1717's PenguinBot 2008
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Our 2005 robot had an arm on top of an elevator, and we lifted the elevator with 2 FP motors. |
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