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Unread 25-04-2004, 18:03
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Re: Omni Wheels Survey

Quote:
Originally Posted by FizMan
... Say you have two motors per set of wheels. Does that mean you can really only apply two motors worth of power in any one direction? So if you were up against a robot that had a tank drive with four motors of power in one direction, you'd only have two to their four?...
this is the main reason that i (personally) don't like "traditional" holonomic setups. mecanum/ilon wheels (such as the ones on these robots) solve this problem to a degree, since it allows you to harness the power of all 4 motors whenever the bot is moving in a direction perpindicular or parrallel to that of wheel rotation. this setup is weakest when it is moving diagonally when only two of the wheels are being powered. in addition, since the rollers overlap, and are rounded, there isn't as much bumping present as there is in the traditional omni-wheel.
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Last edited by RogerR : 25-04-2004 at 18:06.
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Unread 25-04-2004, 18:28
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Re: Omni Wheels Survey

For anyone considering the use of omni wheels on their robot, Andy Baker put out a great white paper on how team 45 made theirs and it has all the specs you need to make a great pair yourself. We on team 177 used a slight variation of these wheels on the back of our robot (we kept pneumatic tires on the front) and they allowed for excellent turning. Despite what people say you do not need at least 3 of these wheels by any stretch of the imagination. We recieved many comments from people attending the Philly regional and nationals that they thought we would be very easy to push out of the way with omni wheels and that they were surprised to see us do all of the pushing. If you saw any of our matches you know that defense was a big part of our game, and these magnificent wheels made that possible.
http://www.chiefdelphi.com/forums/pa...le&paperid=226
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Unread 25-04-2004, 18:48
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Re: Omni Wheels Survey

Quote:
Originally Posted by David Bridge
For anyone considering the use of omni wheels on their robot, Andy Baker put out a great white paper on how team 45 made theirs and it has all the specs you need to make a great pair yourself. We on team 177 used a slight variation of these wheels on the back of our robot (we kept pneumatic tires on the front) and they allowed for excellent turning. Despite what people say you do not need at least 3 of these wheels by any stretch of the imagination. We recieved many comments from people attending the Philly regional and nationals that they thought we would be very easy to push out of the way with omni wheels and that they were surprised to see us do all of the pushing. If you saw any of our matches you know that defense was a big part of our game, and these magnificent wheels made that possible.
http://www.chiefdelphi.com/forums/pa...le&paperid=226
i am interested in your omni wheels, and why u guys choose to put them in the back.. please explain.

we should get all the robots that have omni wheels and make a big gallery of them, that would look cool..
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Unread 25-04-2004, 19:03
tiffany34990 tiffany34990 is offline
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Re: Omni Wheels Survey

well it was our first year with omini wheels-- we actually have to fix them up-- only problem i saw was the rubber on the wheels-- a lot of driving just wore them down-- all well-- i'm sure S.P.A.M. won't mind sharign our design-- nobody we saw had a drive system like us-- and we plan on making them better
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Unread 25-04-2004, 19:06
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Re: Omni Wheels Survey

I saw a few teams using omni wheels bought from this site:

http://www.omniwheel.com

They have an interesting selection.

Rob
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Unread 25-04-2004, 19:09
tiffany34990 tiffany34990 is offline
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Re: Omni Wheels Survey

Quote:
Originally Posted by Rob
I saw a few teams using omni wheels bought from this site:

http://www.omniwheel.com

They have an interesting selection.

Rob

we actually did buy some from that site-- took the whole supply actually for that time period but the wheels didn't work for us--didn't hold our load and no clearance-- i had to actually take down the plastic but that didnt' help much either--so we had to fabricate our own wheels at the end of the 6th weeks-- but we did it-- many teams have seen our wheels they are really cool
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Unread 25-04-2004, 23:35
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Re: Omni Wheels Survey

Quote:
Originally Posted by tiffany34990
well it was our first year with omini wheels-- we actually have to fix them up-- only problem i saw was the rubber on the wheels-- a lot of driving just wore them down-- all well-- i'm sure S.P.A.M. won't mind sharign our design-- nobody we saw had a drive system like us-- and we plan on making them better
i believe 1083 had your same holonomic drive system as nathan pell posted above. I wasn't priveleged enough to see SPAM in action, but i know that 1083 was excellent.
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Unread 26-04-2004, 02:35
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Re: Omni Wheels Survey

Quote:
Originally Posted by tiffany34990
nobody we saw had a drive system like us
Tiffany!?

::GASP::

Not only have you guys seen one, but it was at the Florida Regional with you.
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Unread 27-04-2004, 17:21
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Re: Omni Wheels Survey

Quote:
Originally Posted by George1083
Tiffany!?

::GASP::

Not only have you guys seen one, but it was at the Florida Regional with you.

sry george meaning that nobody made wheels like us-- design that james came up with and that i got to help make and well yeah get to fix them again
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Unread 30-04-2004, 10:51
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Re: Omni Wheels Survey

We (X-CATS 191) used Omni wheels for the first time this year as well... They worked very well and we even made them from scrath recycling old copier parts we pulled out of some dumpster. I'll have to get some closer pictures for ya.

We made an 8 wheel drive system that walked up the platform. It worked well except for the side traction when we were halfway up a step and then we had issues sliding.. Oh well you live and learn...

Ellery
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Unread 30-04-2004, 11:37
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Re: Omni Wheels Survey

Quote:
Originally Posted by Ellery
They worked very well and we even made them from scrath recycling old copier parts we pulled out of some dumpster.
Old copier parts work great for robots. We have pieces of an old one we keep in a box. Lot of good things. We about used a ratchet for our winch that would have came from one and use a couple other pieces to couple a motor to a shaft. If you look beside the van door motor in this picture you can see a piece of an old copier on its right between it and the pillow block. If you could see the top it has a little hole and says oil. We didn't use any though.
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Unread 30-04-2004, 13:04
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Talking Re: Omni Wheels Survey

I think everyones forgetting (or you just werent around) one of the proven bots out there with large omni wheels and they happend to use 6 of them they went in all directions they didnt get pushed around and there was no easy side to push them from they turned marvelously and speed and power to boot

MIM Metal in Motion 343 2002 bot still one of my fav robots of all time check them out and youll see there design ... i wanted to build something like that but i couldnt get the whole building omni wheels thing started any suggestions or things only expirience teaches u when building this nice lil wheels? things i should watch out for when tyring to build and use them?
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Last edited by SpaceOsc : 30-04-2004 at 13:07.
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Unread 03-05-2004, 13:22
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Re: Omni Wheels Survey

Quote:
Originally Posted by SpaceOsc
I think everyones forgetting (or you just werent around) one of the proven bots out there with large omni wheels and they happend to use 6 of them they went in all directions they didnt get pushed around and there was no easy side to push them from they turned marvelously and speed and power to boot

MIM Metal in Motion 343 2002 bot still one of my fav robots of all time check them out and youll see there design ... i wanted to build something like that but i couldnt get the whole building omni wheels thing started any suggestions or things only expirience teaches u when building this nice lil wheels? things i should watch out for when tyring to build and use them?
I was primary operator on team 343 this season and would like to thank you for your comments on "Manuel Overdrive". One thing you might watch out for on your omni wheels is the fact that the small wheels on M.O.'s omni wheels are metal and this year metal was restricted from touching the carpet on the playing field, this may only be a temporary rule or permanent. Thats all the advice I have for now, but I will pass word along to our engineers and they might be of more help to you. Thank You and may gracious professionalism live on!
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Unread 03-05-2004, 13:48
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Question Re: Omni Wheels Survey

Quote:
Originally Posted by Cobbimus
I was primary operator on team 343 this season and would like to thank you for your comments on "Manuel Overdrive". One thing you might watch out for on your omni wheels is the fact that the small wheels on M.O.'s omni wheels are metal and this year metal was restricted from touching the carpet on the playing field, this may only be a temporary rule or permanent. Thats all the advice I have for now, but I will pass word along to our engineers and they might be of more help to you. Thank You and may gracious professionalism live on!
Why where they metal? what did that do?
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Unread 04-05-2004, 13:24
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Re: Omni Wheels Survey

Quote:
Originally Posted by SpaceOsc
I think everyones forgetting (or you just werent around) one of the proven bots out there with large omni wheels and they happend to use 6 of them they went in all directions they didnt get pushed around and there was no easy side to push them from they turned marvelously and speed and power to boot

MIM Metal in Motion 343 2002 bot still one of my fav robots of all time check them out and youll see there design ... i wanted to build something like that but i couldnt get the whole building omni wheels thing started any suggestions or things only expirience teaches u when building this nice lil wheels? things i should watch out for when tyring to build and use them?
That was definitely a sweet robot - we teamed with them to win KSC regionals (with 186 also). Kinda funny that they've switched from omni wheels to Brekoflex drive and we've switched from Brekoflex to omni wheels.
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