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Re: pic: Four Speed Three CIM Gearbox
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Lifting oneself in 2013 could be accomplished using all 6 cims in a drivetrain, for example. |
Re: pic: Four Speed Three CIM Gearbox
This is really cool. If you can find the machining resources to make one I would totally do it as an off-season project. Sure it may not be the most practical thing for the competition season but you'll learn a lot while doing it. You could also design up a 2 speed variant and make that too and do a comparison - maybe even post a white paper so we can all learn about it. Good stuff!
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Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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Assuming your robot was geared for 18 feet per second in high gear, and 0.67 feet in low gear (a 27:1 spread), you'd need to have a 1800 lb robot (or group of robots) to take advantage of the gear ratio and never trip the breaker in a pushing match. If the robot weighed any less, you could get away with a smaller spread and never worry about tripping a breaker. That sounds like my kind of game!! :D |
Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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Don't think of it as a 6-CIM drivetrain, think of it as a 6-CIM powertrain, powering three very different motorized mechanisms in an extremely effective and efficient manner. Many ways to skin a cat. |
Re: pic: Four Speed Three CIM Gearbox
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Although what advantages would it serve to have power coming from the same place if you could just use more motors for a different mechanism? The only reason I can think of is because there is a limit on the amount of CIMs you can use and it's hard to get that kind of power from other motors, so for climbing or stacking you'd want to be able to tap into those motors. But for example there wouldn't be much of an advantage from using a PTO to also power an intake system that could easily be powered by a smaller motor. It would actually be kind of wasteful. |
Re: pic: Four Speed Three CIM Gearbox
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And, for the record, my prediction: The first FIRST team to execute this sort of PTO will join 71, 118, 254, and 1114 as one of the top five teams of all time (unless, of course, it's one of those four who do so). |
Re: pic: Four Speed Three CIM Gearbox
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Second of all, the ultimate PTO would use every motor available and just shift however many motors necessary to any function. (However you'd have to have some crazy programming scheme or something to keep from browning out like crazy) I also think the first team to do this won't be one of the greats; I think the first team to try it won't get picked at their event. That's insanely complicated, even for a team like 254 or 118. I would love to see someone do it successfully though. it would just be a mechanically sick robot to check out. :D |
Re: pic: Four Speed Three CIM Gearbox
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And I did mean the first team to successfully execute it, not the first to attempt it. |
Re: pic: Four Speed Three CIM Gearbox
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Re: pic: Four Speed Three CIM Gearbox
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