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Unread 03-04-2016, 16:20
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RoboChair RoboChair is offline
He who fixes with hammers #tsimfd
AKA: Devin Castellucci
FRC #1678 (Citrus Circuits and 5458 Digital Minds)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 2005
Location: Davis, CA
Posts: 698
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Re: Colson Performa Safety

Quote:
Originally Posted by jnicho15 View Post
Have any teams that use Colson Performas on their shooter mechanism experienced any issues with delamination or other high-speed failures? Our team is considering using the 4x2 hex bore wheels on our shooter at nearly 10,000rpm and are worried about safety issues.
Do not take these speeds lightly, we are running some drive rollers from McMaster at about 5000 rpm on our robot. We had some issues with the rubber delaminating on part of the hub and allowing it to expand one part of the wheel too much. This caused the wheel to unbalance to far and rub against things tearing parts of the wheel off slowly. We fixed this problem by banding the middles with safety wire and burying the twisted end into the rubber of the wheel.

The following video is an attempted destruction test of said banding method, the wheel in the video plateaus at 7,750 rpm and the surface of the wheel is seeing nearly 3,000 G's of outward force.
https://www.youtube.com/watch?v=vOYEp6tjQDg
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