Accuracy of single axis shooter

[TheRozb]

Hey All,

In our team's prototype, we have a single axis shooter (i.e. two wheels on an axle. Ball is fed through and there is a bent piece of sheet metal like a hood to direct it. Pretty much what every Ri3D shooter robot had). However, like most of the Ri3D robots, our precision and accuracy is pretty iffy. We've tuned it the best we could, but it still has pretty poor performance. Anyone had success with a single axis shooter? Ideas?