Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: w_bwr on August 19, 2010, 11:13:31 AM

Title: Confused with Omni-Wheels!
Post by: w_bwr on August 19, 2010, 11:13:31 AM
Omni directional wheels (http://www.youtube.com/watch?v=aXdvLGTW2nQ#)

i didn't understand that how did the robot move in both X and Y direction in this video when no wheels moves in the direction of motion (moving along X).
Title: Re: Confused with Omni-Wheels!
Post by: paulstreats on August 19, 2010, 11:52:15 AM
those are Mecanum wheels.

 The secret is that they have rollers faced at 45 degree angles to the main wheel.
Title: Re: Confused with Omni-Wheels!
Post by: w_bwr on August 19, 2010, 02:21:10 PM
Do the roller movement can be controlled?
Ain't they freely moving?
Title: Re: Confused with Omni-Wheels!
Post by: Razor Concepts on August 19, 2010, 05:25:54 PM
They are freely moving.

Having two of those wheels rotate in opposite directions cancels out any movement in the direction parallel to the wheels, but the rollers on each wheel spin, propelling the entire assembly in a direction perpendicular to the wheels.
Title: Re: Confused with Omni-Wheels!
Post by: Hawaii00000 on August 19, 2010, 07:27:32 PM
Never seen these before. They look pretty nifty.
Title: Re: Confused with Omni-Wheels!
Post by: voyager2 on August 19, 2010, 08:43:43 PM
I've seen these before!
Actually this very robot!
Eyebot controller, built here in WA, I think...
Anyway...
Saw one of them at the SCITECH (local science place)
Even got to RC it.
I blew them away with my SoR knowledge...
Title: Re: Confused with Omni-Wheels!
Post by: Hawaii00000 on August 20, 2010, 07:39:29 PM
Awesome!
Title: Re: Confused with Omni-Wheels!
Post by: Team Orr on August 21, 2010, 06:59:55 PM
Strafen test driving (http://www.youtube.com/watch?v=hk6nfKTvEZI#)