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Unread 20-01-2017, 00:57
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Ginger Power Ginger Power is offline
The GreenHorns Team Lead
AKA: Ryan Swanson
FRC #4607 (C.I.S.)
Team Role: Mentor
 
Join Date: Jan 2014
Rookie Year: 2012
Location: Becker, Minnesota
Posts: 893
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Re: Accuracy of single axis shooter

I wouldn't say our (The GreenHorns) shooter was inaccurate. When the balls were fed at a slow enough rate (around 1 Fuel/second) the shooter put the Fuel in a pretty tight grouping. During the filming for the reveal video we were hitting with around 80% accuracy.

With that said, I'm assuming you're having consistency problems when trying to shoot at faster speeds then 1 Fuel/second. Two (relatively) easy solutions to this problem are to put more power into your shooter wheel by adding a motor, and/or adding a flywheel to increase the amount of inertia on your shooter.

General things you can do with a single axis shooter: make sure the compression of the ball is consistent throughout the contact with your shooter wheel. Make sure your wheel isn't slipping on the Fuel as you shoot. Run the wheel using closed loop control so the speed of your shooter wheel isn't dependent upon the voltage of your battery. Make sure your hood (whatever you're using opposite of the shooter wheel) is solidly mounted and can't flex.

It would help to know the exact situation your shooter was experiencing when you were having consistency issues. Did you have closed loop control, or were you powering the system with a drill? How finalized is your setup? Pictures would help even more, but I could understand if you didn't want to share those.
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