Our team has not been finding success with our shooter. Currently we are using 2 neos with harder 4 inch wheels. We have tried different wheel types, sizes, and a 3:1 gear ratio but cannot get enough power. Our first thought is to add a motor to each side but we’ve considered a vertical shooter too. What has your team done and found success with?
Dig around through the open alliance and robot reveals.
There is a lot more to shooter geometry than number of motors, size/number of wheels, etc.
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One thought about why you may be struggling with power: are you letting the wheels speed up all the way before you put the note in?
A few considerations that you may want to think about in addition to the variables you mentioned:
- What style of shooter are you doing? Are the wheels spinning parallel or non-parallel to the ground? Ours are parallel. I am not entirely sure what you mean by a “vertical” shooter.
- What is the compression on the gamepiece (distance between wheels)? (ours is 1.5" between wheels, 1/2" of compression)
- How is the ring being fed? How much compression is on the ring as it contacts the shooter wheels? (ours are fed by polybelt, with close to zero compression on the disc from the feed system as it initially contacts the shooter wheels)
- What speed are you running the shooter at? (we are running between 6-8krpm wheel speed)
Some of these were things we got bit by on our initial shooter version-- we had too little compression (1/4") and were compressing the disc by almost 1/2" as the disc contacted the shooter wheels, which lead to some extremely anemic shots.
Best of luck! If you feel comfortable I would highly recommend posting pictures, as it’s way easier to catch issues with a picture than a general description.
Posting pictures and CAD of your current design is also helpful to give you more actionable feedback.
When you say 3:1 gear ratio are you saying:
A) For every 1 rotation of the motor the wheel turns 3 times. (upduction)
B) For every 1 rotation of the wheel the motor turns 3 times. (reduction)
If the answer is B I would recommend starting there. Most teams are finding success with upductions on the shooter wheels this year. Without knowing more about your robot design it is hard to give any more advice.
Yes, we are
Sorry for the confusion, a “vertical shooter” as our team calls it has wheels perpendicular to the ground
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