[FVC]: 3053's Robot

fredliu168 · #1 18-03-2007, 17:01

What's the gear ratio on the arm?

nonother · #2 18-03-2007, 19:18

Quote:

Originally Posted by fredliu168

What's the gear ratio on the arm?

The gear ratio shown in that photograph is 1:5.

macmaniac · #3 18-03-2007, 23:41

We just changed the gear ratio to 1:7. This allowed us to drop 2 of the four arm motors and move them to the drivetrain to increase maneuverability.

sovierr · #4 19-03-2007, 12:29

Wow-I'm surprised that a 7:1 ratio can provide enough torque to lift that arm. I'm guessing it's aluminum - correct? Even still, I would have guessed twice that ratio.

nonother · #5 19-03-2007, 15:08

Quote:

Originally Posted by sovierr

Wow-I'm surprised that a 7:1 ratio can provide enough torque to lift that arm. I'm guessing it's aluminum - correct? Even still, I would have guessed twice that ratio.

The arm is made of aluminum and was designed to be as minimalist as possible to keep a low weight. The weight of the softballs is the more determing factor. Five softballs is approximately 1.9lbs.

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