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Unread 05-02-2012, 13:50
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FRC #2900 (The Mighty Penguins)
Team Role: Mechanical
 
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Re: Gear ratios for launcher

Quote:
Originally Posted by JamesCH95 View Post
The gear ratio depends heavily on the diameter of your end effector, assuming you're doing a roller/wheel shooter. Direct-driving with a CIM to a 1" roller is very different from an 8" wheel.

OP, care to provide any details? My team's experiments show that you should find the exit speed you need for your range, assume the ball will go 60%-70% of your theoretical tangential free speed, and gear accordingly.
We are doing a one-wheel design that uses the new six inch wheels that came in the kit of parts and a flap on the top to adjust the angle the ball comes out of.

We were just worried that a high gear ratio wouldn't have enough force to launch several balls and it would be hard to get back up to speed.