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Unread 20-01-2009, 22:44
shawn1231 shawn1231 is offline
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FRC #1997
 
Join Date: Jun 2008
Location: Kansas City
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Re: PVC to wood bearings??

Also, concerning brushes, we used a 23" diameter outer helix combined with and offset by 180 degree inner spiral that about 12" in diameter and a piece of 2.5" PVC in the middle spinning on a CIM attached to an old BaneBots transmission. This was quite enough to get the ball up our four revolutions to the top (about 4') using no traction tape or brushes, just slick PVC against the orbit balls. I should add that we lost our single sad orbit ball on Saturday so we had to use a basketball stand-in for some of our testing. The diameters are the same but the basketball is much much heavier than the orbit ball and our setup was still enough to move the much heavier ball up our helix. Granted the basketball is much stickier than the orbit ball but it's weight should be enough to offset any benefits top be had by it being stickier.