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Unread 20-01-2012, 16:35
nixiebunny nixiebunny is offline
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AKA: David Forbes
FRC #4183 (Bit Buckets)
Team Role: Mentor
 
Join Date: Jan 2010
Rookie Year: 2011
Location: Tucson
Posts: 163
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Re: Ball Pitcher Hood Design

I'm new at this, but have a couple mentors who built a decent shooter for Lunacy. We made a prototype 4" ABS pipe shooter wheel, lined with 3M grey tub grip tape from Ace. It is very gentle on the balls, yet very grippy.

Our prototype has 1" compression against two curved 1/2" EMT conduit rails spaced 4" apart for the top of the shooter ball path. This gives the ball a trough to roll in, which makes for very accurate azimuth control of ball path.

I'm thinking of using a 2012 orange-ring Fisher Price motor with ~4:1 reduction, but we'll see what's possible to make in a short time. McMaster Carr sells 32 pitch nylon and metal gears that should mate with the FP motor pinion, if my math is correct.

We also plan to try the Jaguar speed control feature. It should provide hours of amusement to get that working well.
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--David Forbes
Mentor, Bit Buckets team 4183. Assistant cat herder and dispenser of legendary tales.
Need a Nixie watch? Yes, you do. Ask me.