Quote:
Originally Posted by idahorobot
Good advice! Do omni wheels get the same reviews as Mecanum?
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In general, the physics between the two are essentially identical (assuming it's a 4-wheeled holonomic drive with wheels at 90deg angles). The coefficient of friction may vary slightly, depending on what brand omni-wheel you buy, but they are usually in the same ballpark. Omnis are usually much cheaper and lighter than mecanum wheels. On the other hand, mecanums are (typically) better at handling inclines (such as the bump) than most omni systems, though both systems may require a suspension to cross the bump.
An important note about both. The vector-based physics of the systems will limit you to 50-71% of your total power of your drivetrain, and the angles of the rollers also limit you to 50-71% of your total contact area resisting outside motion (your total traction). That % varies based on what direction your driving/being pushed. So the system will both suffer while trying to push another robot, and while being pushed.