# RI3D- 'Snow Problem 2022

We’re looking forward to the chance to continue making great resources for the FRC community!

Live stream: https://www.twitch.tv/snowproblemz

Thanks to our generous sponsors: University of Minnesota

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Launching system prototype video https://youtu.be/KluPr5TDDTo

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3rd (and final) prototype of the day: Intake/ indexer https://www.youtube.com/watch?v=CRMVqYBZtJY

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Can you provide more information about this shooter? What diameter are the wheels, what RPM is it spinning at? And can you shoot without the blocker? I am interested in seeing if it will shoot high enough to get into the high goal.

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the wheels are 8" pneumatic wheels with the tube removed, and it does shoot with a fair amount of power the blocker was there to prevent damage to the lights in our workspace. tomorrow morning we will be back and we can try to measure rpm then

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White paper regarding our prototyping from yesterday: Prototype Concepts White Paper (1).pdf (861.0 KB)

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Results from day 2: Lots of cad being done by team members to get parts ready for final robot. one additional transport prototype as well: Ri3D 2022 Day 2 - Ball Storage Mechanism Testing - YouTube

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Day 3 water jetting to manufacture parts Ri3D 2022 Day 3 - Water Jetting - YouTube

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Hermes, our completed robot

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Hi! Are you going to post a video of your climb working soon?

We are working on a full reveal video, expect this later tonight or tomorrow morning

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Can’t wait! The robot looks really good

I noticed you choose to sandwich the ball between two sets of belts for feeding into your shooter. Was this purely a practical choice, or was there a reason to use force on two sides of the balls as opposed to just one?

2 belts puts the ball under a slight compression which we found to really help with transport. with only one belt and no compression we would be relying exclusively on the “grab” of the belt. With compression, the forces normal to the belt are stronger, giving higher friction forces.

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Also, by applying force on both sides, the ball does not rotate as much and is easier to align with the shooting mechanism.

Robot Reveal Ri3D 2022 - Robot Reveal - YouTube
Walkthrough video will be posted tomorrow morning

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White paper of our technical walkthrough: technichal paper.pdf (48.3 MB)

Do you have an uncut video of the full climb?

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Looks like they never got it to work without help. From their whitepaper -

We were able to consistently climb the mid rung with the mechanism and it performed as expected, however the high rung climb was elusive in practice due to swinging motion of the robot. We were able to climb the high rung when the robot was stabilized by team members preventing chaotic swinging, though this is obviously not a valid competition strategy.

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