Thread: Top/bottom roller shooter vs. bottom roller only
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Unread 02-02-2012, 20:40
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Re: Top/bottom roller shooter vs. bottom roller only
Quote:
Originally Posted by dragonman View Post
Ok so, I am design our shooting system and have designed a two roller shooter, however I was informed there is an optimum roller diameter based on the rpms it will spin and the ball diameter and I was told there where calculators. I found jvns design calculator but there wasnt anything about shooting. Does anyone know about any calculations and formulas I can use or of a Design calculator for this?
For a 2-wheel (top and bottom) shooter with both wheels the same diameter and powered and spinning at the same speed: If you assume that the ball exit speed is equal to the tangential velocity of the wheels then

wheel rpm = 720*V/(pi*d)

V is ball exit speed in ft/sec, and

d is wheel diameter in inches


For a one-wheel shooter, the required rpm will be approximately twice that.


As for motor selection and gear ratios, here are some thoughts:

http://www.chiefdelphi.com/forums/sh...3&postcount=15

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