Quote:
Originally Posted by Ether
I couldn't find any data for polycarb-on-nylon friction. I suspect it's not pretty.
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I concur. However, in many cases where omnis are used, the goal is either to allow a long wheelbase robot to turn (tank with 2 or 4 omnis), or to allow fine strafing adjustments so that a robot can line up on a game piece or a target after forward motion has completed or nearly completed (H/slide drive). In both of these cases, "not pretty" is still a whole lot better than "solid wheels".
I can certainly see roller friction while applying driving torque being a real problem with kiwi (three omni wheels in a triangle) or Killough (four wheels in a diamond configuration) drives. I almost suggested kiwi (implicitly using duraomnis due to our game's KoP) to one of our intramural design teams today; I'm glad I held back.