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Unread 22-11-2012, 23:54
RRLedford RRLedford is offline
FTC 3507 Robo Theosis -- FRC 3135
AKA: Dick Ledford
FRC #3135 (Robotic Colonels)
Team Role: Mentor
 
Join Date: Jan 2010
Rookie Year: 2009
Location: Chicago, IL USA
Posts: 286
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Re: [FTC]: NEW ROBOT DESIGNS!

Quote:
Originally Posted by Coach Norm View Post
Very inspirational posts to this thread showing pushing the limit with the new materials allowances.

I see FTC moving more to a manufacture and design competition for some teams with the new rule changes. I am the team lead for our overall program and do not get much time to work with the FTC program. I am excited to see the new designs such as your team(s) have posted in this thread. Hopefully we will see more teams post pictures and designs. I feel that is one of the unique features/strengths of FRC.

Just wondering how you are moving your elevator? I notice what looks to be pulleys, will it be actuated by a series of pulleys? If so, what thread/cord are you using?

Norman
I agree that the new direction of FTC for allowing use of additional materials will be good for the program, and it will help to better train the younger students on the kind of fabrication skills and creative design thinking that will directly carry over to the into the FRC program.

We are lifting our elevator for a maximum travel of 28" using some no stretch, 600 lb. test, kevlar cord in 3/32" size -100 ft for $16 at this source:

http://www.qualitynylonrope.com/mm5/merchant.mvc?3/32

We will use two 3" or 4" Tetrix wheel hubs (rubber removed) as our cord winder "drums", and the cord will wrap 3.5 or 2.5 times around these nylon wheel hubs.

The cord will feed both on & off each of the winder drums in two directions, one end will pull for lifting and the other end, when winder drum reverses, will pull for lowering, since there is a fair amount of friction with the slides we are using.

-Dick Ledford
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FTC 3507 RoboTheosis
FRC 3135 Robotic Colonels

Last edited by RRLedford : 23-11-2012 at 00:35.
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