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Unread 11-02-2004, 21:10
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Mike Norton Mike Norton is offline
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FRC #0061
Team Role: Teacher
 
Join Date: Oct 2001
Rookie Year: 1995
Location: Upton, MA
Posts: 476
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Re: Team 61 2004 robot

Quote:
Originally Posted by greencactus3
wow! that is one looooooooong arm.
it looks like you're using wire to change the angle of the arm too..
how many wraps around the drum are you going for that part?
does it have any slip at all?

the arm is always in tension. there are two different cables both are about 14' long. this is a 5" pulley. so we bring in about 15" on each turn. we gear down the globe 3:1.

what brings the arm up and down is the van door motor same style a push pull system. The arm stays in place because of the speed controls hold the van door up from back driving. with this arm we can pull a wheelie in both directions when the wheelie wheels are down.


By the way this arm can lift a lot . So to keep the 2x ball in place at the end of a match might be a little problem if you leave it .
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