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Unread 12-08-2011, 13:58
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the Dreamer
AKA: Alex
FRC #4334 (Alberta Tech Alliance)
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Re: Advantage to six wheel drive?

Quote:
Originally Posted by Hawiian Cadder View Post
because a live axle is always spinning, every time there is a shock load, or the robot sits for a long period of time, the axle is in a different orientation. however ALL the shock loads on most dead axle setups occur with the axle in the same orientation. So after a while the axle may start to bend in that direction. I haven't noticed this problem with our .5 inch dead axle robot> But on the cart was made from the kit-frame, the axles are severely deformed and bent. this was also a problem on our 2009 prototype. In a year like logomotion, this may not be an issue, in a year like breakaway, where every time a robot came off the bump the axle took the shock in the same way, I think it could definitely contribute to some bending.
But if we're comparing WCD to dead axle set ups then the fact that the shaft is unsupported more than accounts for any problems caused by multiple shocks in the same place. Bottom line, your axle shouldn't ever be bending, don't rely on an equal distribution of bends to keep your axles straight.