From FTC forum:
"Thread: Robot Parts and Materials - Answer Thread"
Casters
Quote:
Originally Posted by FTC5950 View Post
We were wondering if rubber caster wheel (http://www.lowes.com/ProductDisplay?...llow&cId=PDIO1) was legal. We were not sure if it would fall under wheels (legal) or COTS (illegal due to 2 DOF).
Thanks!
5950 - The Bio-Bots
A: This caster wheel is a COTS and has more than one degree of freedom. Therefore it is illegal.
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We used a castor to make a gimbal. We removed the wheel and attached a linear slide. Maybe if you use a different wheel and only use the castor as a "lazy susan" the 3 DOF rule would be satisfied. You could post this question to the FTC forum to be sure.
A fixed Omni wheel would achieve the same performance without the issues from castor pivoting.