Chief Delphi - 229 Drive Train

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- - 229 Drive Train (http://www.chiefdelphi.com/forums/showthread.php?t=33150)

Re: 229 Drive Train

Quote:

Originally Posted by ajlapp

John sent me a message letting me know they were working on an omage to our original kiwi robot.........

homage :(

Re: 229 Drive Train

Quote:

Originally Posted by Max Lobovsky

Guys, there are other teams that have since, and will, use omniwheel holonomic drives. And I mean in competition. The 4 CIMs are definitley inviting.

Yup, they sure are... Hmmm....

Re: 229 Drive Train

I am downloading the video as I write this (dumb 56 k)
I have heard of the kiwi's and saw a couple lego models...pretty shweet. I can't wait to watch the vid.
The holonomic is also very shweet as you mentioned max. Uuhh I think 1083 had one last year... wicked ball gatherer.

But the real question is.. Where the mecanum at?!?
^kinda off topic (heh sorry... I couldnt resist asking)

Re: 229 Drive Train

Love the video, love the song. This is a great looking robot with smoooth motion. Kudos to 229.

(btw.. thanks for the plug at the end)

Andy B.

Re: 229 Drive Train

just because im a geek, is it coincedence that the file size is 22.9mb? lol....

Re: 229 Drive Train

I love it!! That is a cool Drive Train. Good work to 229 and 857. wow.

Re: 229 Drive Train

Quote:

Originally Posted by Greg Perkins

just because im a geek, is it coincedence that the file size is 22.9mb? lol....

Oh no, 229 is appearing everywhere again :ahh:

Re: 229 Drive Train

229, thats incredible. I know it isn't the game drive, but itd be fun to see it in action on the field!
Looks great!

Re: 229 Drive Train

Quote:

Originally Posted by Matt Fultz

229, thats incredible. I know it isn't the game drive, but itd be fun to see it in action on the field!
Looks great!

Man i wish i was i could goto nationals this year ;) awesome robot

Re: 229 Drive Train

We greatly appreciate the compliments, however we're just (as usual) standing on the shoulder of a giant.

857 and the boys at MI Tech were the ones who showed us how to do it, AndyMark provided the omni-wheels, and we just took it from there.

Personally -- I can't wait to see what other cool omnis we see this season.
It is a good year for them.

John

Re: 229 Drive Train

this is so cool , but i don't get how it works :confused:

Re: 229 Drive Train

Quote:

Originally Posted by Projectchon

this is so cool , but i don't get how it works :confused:

William,

The wheels are all set 120 degrees apart and are special Omni or Trick Wheels. This allows for the component forces of the wheel to power the robot in the desired direction. The most basic example of this is the robot going straight forward. To do this 2 of the wheels are powered the same amount and the third trails behind with little friction due to the rollers on the Omni wheels.
In the attached diagram (Sorry for the paint usage, it was the quickest way) you can see that 2 black arrows are the forces from the wheels. The red vector (arrow) is the force applied backwards from the wheel and the blue one is the perpendicular force. If you add up the forces in both directions (vertically and horizontally) the 2 blue arrows cancel each other out and therefore the robot only moves in the red direction. Powering the three wheels at various levels creates a more complex model, but allows the robot to move in any direction. I hope this helps.

-Eric

Re: 229 Drive Train

thx alot Eric, now i want to buy a few omni wheels

Re: 229 Drive Train

Quote:

Originally Posted by sanddrag

If I was going to Atlanta I'd be the first customer. I'd pay $15 for a 3 minute try.

Dude, we still have the original kiwi in our shop. Works great (play with it whenever we get bored.) I'll bring it to great lakes and midwest if people will pay to drive it. :D

Re: 229 Drive Train

Hey now, no selling things at competitions! :D

(Can you tell I've been reading the manual too much lately?)