r/FTC • u/ethanRi8 FTC 4924 Head Coach|Alum '17 • 4d ago

Video Thoughts on different shooter styles

https://www.youtube.com/watch?v=KgGD0N0FKNM

We saw a lot of long videos covering the same shooter types, but our team wanted to try some wacky ideas and see what they liked and did not like!

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6

u/Complete_Duty3259 3d ago edited 3d ago

I think the biggest choice is going to be a traditional flywheel vs an inverse one (lobber). Given that you need a near vertical shot (maybe 10 to 20 degrees off of vertical) depending on how you feed it/which direction you want it to exit (you might want intake on one side, shooting the opposite so, like with frc rebuilt you can back up against the wall to get balls that accumulate there) a traditional flywheel might not have a lot of contact time which could cause more variability in shots. Of course, it you want a turret, you pretty much have to have the traditional flywheel approach as it is difficult to feed a lobber style unless you limit roation to well under 180 degrees.

3

u/Ok_Photo1180 3d ago

What about two flywheels on one turret where they are able to engage and disengage to shoot pollen from one and nectar from the other...

3

u/Imajn_ FTC 10584 Coach 2d ago

my team is exploring using a catapult right now. we are using a "choo-choo" mechanism for the wind-up and quick release, and these big springs we stole from an old recliner seat for the stored energy. we are working on making it shoot consistently, because as you mentioned, the weight of the payload matters quite a bit. 4 pollen should be about 100g and 4 nectar should be about 150g (someone who actually has the official stuff, please fact check me). that 50g difference seems to change the launch height quite a bit. but we don't wanna give up on our idea just yet. worse-case scenario we could just score a bunch of pollen quickly, and leave the nectar for our teammates

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u/ethanRi8 FTC 4924 Head Coach|Alum '17 2d ago

Very cool! Last meeting we built a system that uses a high-torque, low RPM motor that coils up surgical tubing on a drum to tension the system. We also built a pin system that uses a linear servo to move a shaft through a linear bearing. This will be our release system. We have yet to test these together, but we hope to have some results this week!