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Unread 18-12-2007, 17:43
CraigHickman
 
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Re: pic: New wheel CAD

Quote:
Originally Posted by Ben Piecuch View Post
I'm sorry, did you say "way too heavy?" How light do you need to make your wheels? Even with a 6wd setup and a 0.5lb wheel, you're only saving 1.5lbs from your drivetrain over what you show here.

I think our wheels were about a pound each last year. Then again, we were concerned about machining time, and not weight. It would have taken twice the time on the lathe/bridgeport to take another 1/4lb out of each wheel... Not worth the effort for us, though YMMV. Good luck with the lighter wheel.

BEN
Weight is everything. 1.5 pounds down low is 1.5 pounds of speed you can put into your scoring mechanism.

Quote:
Originally Posted by Nuttyman54 View Post
That, my friend, is a gorgeous wheel! How many machining ops does this one take, and why did you decide to go with a 5 hole/spoke pattern instead of the standard 6?

I have the feeling I'll be seeing another sexy and competitive robot out of 114 again this year! See you at SVR
This one is a 2 op on the CNC. The rivet holes are all even mainly just for show. We actually just sort of drill them on with a power drill when installing the tread. It saves a lot of machine time, and cost.

The 5 pattern is far more stylish, and lighter. Besides, everyone else does 6 or 4, which is why I usually stick with 3, 5, or 7.
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