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Unread 19-02-2009, 00:44
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JVN JVN is offline
@JohnVNeun
AKA: John Vielkind-Neun
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 2000
Location: Greenville, Tx
Posts: 3,159
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Re: pic/video: Team 148 - Robowranglers 2009 - TORNADO

Quote:
Originally Posted by Travis Hoffman View Post
Don't be afraid to try and deny access to the balls even after they've hit the floor, either. At least scatter 'em around a little to make drivers like Parker work for it.

And yes, that stuff probably could be in another thread, so to get back on track - it looks like a CIM powers your helix - what gearing did you use to power the helix drive, and what material was used for the central spire?
Parker's not scared of work...

The spinner rotates at about 450 RPM. This speed was unscientifically determined during our prototyping.

The spinner is a 9-sided (yep, couldn't resist) drum made of 3 pieces of 063 Lexan. Onto that lexan is riveted some brush assemblies.

We originally had Lexan fingers sticking off, but during our 3 weeks of testing and tuning we learned that sometimes the fingers can tangle with these silly game objects. We figured, "even if it jams 1 time in 1000, why risk it?" and went to brushes.

Any other questions?
-John
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In the interest of full disclosure: I work for VEX Robotics a subsidiary of Innovation First International (IFI) Crown Supplier & Proud Supporter of FIRST