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Unread 14-05-2012, 09:56
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Nick Lawrence Nick Lawrence is offline
Commander Canada
FRC #3940 (CyberTooth, AndyMark)
Team Role: Mentor
 
Join Date: Mar 2009
Rookie Year: 2005
Location: Kokomo, IN
Posts: 712
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Re: pic: CD 7 ball harvester

Quote:
Originally Posted by Brandon Holley View Post
Stiff rollers are absolutely essential.

-Brando
1503 learned this lesson too, but unfortunately too late. our rollers were thin-wall (I don't remember the exact gauge) AL tube with PVC rings pinned to it.

As a sophomore I could flex it by hand.

It didn't become until the second revision of our roller geometry, which included some green fishing line to tension the bands, which put a fair amount of lateral force on the rollers. To this day, you can still see the warp in the back rollers.

That robot could have been so much more efficient if we had known.

Whoops.

-Nick
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