How to make flywheel shooter more consistent Slapshot VEX IQ

Hi everyone!

We built a flywheel shooter, however, it has four major problems.

  1. Sometimes our discs will go too far, but other times it will go too short.
  2. The discs will stray left and right whenever we shoot the discs.
  3. Sometimes the discs get jammed while shooting.
  4. The discs will shoot too high and hit the bar we have built on top of the mechanism.
    Here are some pictures:

Also, here is the video we decided to base our robot on

https://www.youtube.com/watch?v=pbQqUvSgJHo

Make sure there isnt too much friction, and make sure your flywheel isnt too low. Both of those might cause the flywheel to become inconsistent. One reason why flex wheels are popular in Spin Up is because that flex prevents the disk from taking out way too much energy when being flung. A possible alternative if you dont have a flexible wheel is to use a flexible wall, im not sure what parts tou have at your disposal and if you can do that in IQ though.
Also, remember that gearing up for speed reduces torque, with that in mind going too fast might actually reduce your range and certainty reduce consistency.

Also, if you have gotten to see the video I posted in the earlier comment, there is some sort of “seesaw” mechanism. The basic idea of that mechanism is to tilt forwards and backward using gravity to get the discs into the shooter. However, I don’t get how to build that mechanism because it is always moving.

Any help?

Im guessing the center of gravity is far on the front of the tilter, allowing it to sit in one position when not lifted. It might also use a rubber band to hold it in place when the motor is not lifting it. While I am not sure if IQ motors have this function, if they do, than the braketype hold function coule also prevent the mechanism from moving when not supposed to

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Actually looking closer at the mechanism, it can also hold itself in other positions so it seems its using a brake type hold or something similar if iq doesnt have that

The new Balloon Tires can give that flexible wheel effect. The Thin Plastic Sheet could be one option in providing a flexible wall.

We are talking about the vex IQ orange plastic discs, which cannot flex.

Yes, similar to VRCs disks which are foam but do not flex. Because the disk doesnt flex, you need something do flex for it. Either a compressable wheel or a flexible wall. Otherwise if there is no flex at all, the flywheel will take a ton of energy out of the spin to force the disk out the front.

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As many have already said, The balloon tires could be fun to try with this. Another thing that you could try is adding some flywheels to the system to get a more consistent wheel speed.

I am interested to see any further development on this kind of launcher. You don’t see these in very many IQ Robots.

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Looks like the discs can fall into it, but there is a slight bump preventing them from reaching the flywheel while driving normally. When the scoop is tilted back, the discs move farther away from the flywheel (and up onto a tilted portion of the ramp), so that when the ramp tilts back down, the discs will have enough kinetic energy to clear said bump. This allows them to reach the flywheel setup, and be shot into the scoring zones.

China be like:

(btw this “design” was featured in a CCTV news cast during the World Robot Contest Championships in Beijing this August).

  1. wrap some rubber bands around the wheels
  2. ratchets maybe
  3. make sure the flywheel spins up to its final speed before launching a ball

Do you have a manual for this robot? Can you share with me for reference. Thank you very much!

There is not manual for any bots that can do everything. The only manual there is is for the hero bot.

Sorry, I am uninformed. Why would you add a ratchet?

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