Team 67's incredible shooter

[Jay O'Donnell]

Originally Posted by Adam Freeman

Jay,

The angle varied at the wheels worn in during the competition. We had to continuously adjust the shot positions throughout the competition to keep up with the changing wheels.

Our nominal pyramid and autonomous shot was around 20-21 degrees. Any time we lost our position of the potentiometer, we would use a digital inclinometer to adjust the autonomous shot back to 20 degrees, then make fine adjustments from there.

For full-court shots, the angle was a little bit lower. This usually changed a lot as the wheels wore in. Theoretically it was setup around 10-12 degrees. Not exactly sure what angle we shot at most of the time. Knowing the exact angle was a little less critical since our operator manually adjusted it during each match to keep the shots hitting in the middle of the goal.

As Akash and Michael pointed out, we used a piece of 1" AL angle riveted to a connecting link (7321K7 @ McMaster) with a platform on it. The chain ran under the hopper and grabbed the frisbee on the inside front lip and pulled it into the shooter wheels. I designed it to release and dip under just as the frisbee was contacting the wheels. We used bike chain and a VEXpro planetary that was geared to 100:1 (if I remember correctly) with a AM9015 motor.

Our drawings and CAD models are so crude, it would be pretty embarassing to show them to anyone. But, I'll see what I can find.

-Adam

Thanks for the quick and thorough response!
-Jay