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Unread 06-23-2010, 09:41 PM
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Drive Train Prototype

Team 461 has been prototyping an omni-directional drive train concept we call Jump Drive. It switches between mecanum wheels and traction wheels to allow omnidirectional movement and also pushing power (similar to 148's "nonadrive"). We began building it in the Fall of 2009 but were only just able to complete it and get video.

Hope you enjoy it and please let us know what you think.

Video: http://www.youtube.com/watch?v=uEUIshtjbe4

Pictures: http://boilerinvasion.org/index.php?...2_itemId=24653
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Unread 06-23-2010, 10:56 PM
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Re: Drive Train Prototype

how much does that weigh?
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Unread 06-23-2010, 10:58 PM
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Re: Drive Train Prototype

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Originally Posted by Hawiian Cadder View Post
how much does that weigh?
Done properly, under 40 lbs.
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Unread 06-23-2010, 10:59 PM
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Re: Drive Train Prototype

Reminds me of team 980 in 2003, but they did it for switching "gears" not directions.
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Unread 06-23-2010, 11:02 PM
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Re: Drive Train Prototype

Very cool idea. I like the innovation.

As is, how much does that weigh? (not how much will it weigh eventually...)



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Unread 06-23-2010, 11:03 PM
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Re: Drive Train Prototype

something i thought up that could either be more complex or simpler, a tank drive, with only omni wheels and some method to prevent sideways slip, that turned into a holonomic drive by angling the wheels. i think that because there would only be one set of wheels, it might leave more interior room for electronics and what have you.
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Unread 06-23-2010, 11:04 PM
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Re: Drive Train Prototype

WOW! Now that is cool

I kinda don't like how it bobs up and down when it switches wheels, but it's not really a problem (though it could easily be fixed with a few omnis, or casters)
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Unread 06-23-2010, 11:08 PM
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Re: Drive Train Prototype

Darn it! You guys beat me to it.
I've been playing around with this idea in my head for awhile now, though it's great to see someone actually build it.
Ok question time.
Is there a reason as to why you decided to have the mechanums on the outside instead of the inside?
Did you guys play around with any other configuration ideas, such as having all 8 of the wheels on the ground at once?

Great work, make sure to run some good tests on it and let us know what you find!
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Unread 06-24-2010, 12:01 AM
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Re: Drive Train Prototype

How many Solenoids are there?
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Unread 06-24-2010, 12:07 AM
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Re: Drive Train Prototype

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Originally Posted by 548swimmer View Post
Done properly, under 40 lbs.
Where did you find out how much 461's prototype weigh? Or any mecanum - traction combo, anyway?

I heard (if you're wondering where, in the pits at Atlanta) the 148-217 drivetrain this year, while it had an extra wheel, weighed a lot more than that.
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Unread 06-24-2010, 06:09 AM
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Re: Drive Train Prototype

Where did you get those mecanum wheels? Never seen ones like that before.

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Unread 06-24-2010, 06:35 AM
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Re: Drive Train Prototype

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Where did you get those mecanum wheels? Never seen ones like that before.

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Unread 06-24-2010, 08:55 AM
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Re: Drive Train Prototype

Quote:
Originally Posted by Chris is me View Post
Where did you find out how much 461's prototype weigh? Or any mecanum - traction combo, anyway?

I heard (if you're wondering where, in the pits at Atlanta) the 148-217 drivetrain this year, while it had an extra wheel, weighed a lot more than that.
For Overdrive we had a robot with eight wheels that could switch between two sets of four. The chassis sitting in our shop weighs under 40 lbs, though barely.
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Unread 06-24-2010, 08:56 AM
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Re: Drive Train Prototype

Does it spin in place well? It looks like the mecanum wheels might need to be swapped.
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Unread 06-24-2010, 11:08 AM
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Re: Drive Train Prototype

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Originally Posted by Jared341 View Post
I believe they are these.
Ah. Looks like they've been re-designed. The roller mounting tabs look a lot sturdier. It looks like the rollers still rub against the mounting tabs though. That's a bit disappointing.


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