Thread: Driving Colson Wheels
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Unread 04-01-2011, 21:54
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
  
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,510
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Re: Driving Colson Wheels
The one time I used Colson wheels was on this robot. I made hubs similar to the above, but I put a keyway and key between the hub and wheel also. I thought I had them pressed in, but I got a few that started sliding out. They weren't knurled though. It drove really nicely and smoothly on those wheels. However, it got pushed around by robots with wedgetop incline conveyor belting tread. In my experiences, the coefficient of friction on carpet was more in the range of 0.8 to 0.9, if I remember correctly (it was nearly 5 years ago). I think they were the 7/8" wide by 3.5" diameter ones.

I once tried machining the hub down flat on a Colson 6" wheel, and found air-pockets/voids inside the plastic, that were not visible from the outside prior to machining
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
Last edited by sanddrag : 04-01-2011 at 21:57.