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Unread 19-05-2010, 08:39
Hawiian Cadder's Avatar
Hawiian Cadder Hawiian Cadder is offline
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AKA: Isaak
FRC #0159 (Alpine Robotics)
Team Role: CAD
 
Join Date: Feb 2010
Rookie Year: 2003
Location: Fort Colins Colorado
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Re: pic: team 159 mechanum wheel, itteration 2

each roller has an axle which is .5 inches in diameter, however the last 3/16 of that axle will be turned down to 1/8 inches in diameter. on the fat edge of the roller a 1.125 od .5 id bearing will press fit in, on the outside a .75 od, .125 id bearing will fit in. as part of the new design, the rollers will not be printed, however we will print a mold, for urethane casting. our printer has a resolution of about 1/64 of an inch, so the rollers will have the texture of 60 grit sandpaper in theory. i may add a little more texture too before printing. the last thing to add is rubber weather coating. it is sort of spray on rubber, designed for protecting patio furniture. it is incredibly tough, and creates a very thing coating which should give the rollers a tiny bit of tread.

as always, any comments are appreciated, these might be built the coming season, but definitely will be built the following season.
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