FIRST Capital Ri3D 2020 Megathread

We’re back for 2020!

FIRST Capital Ri3D is hosted by TechFire 225 and broadcast over FIRST Updates Now , with team members from throughout FIRST. We are looking forward to sharing in our journey with everyone again this year.

Check out our creation from 2019 here

Updates from last year:

  • Increased focus on creating useful short video content for teams (prototyping, game piece interactions, etc)
  • 20 new members
  • Over 30 teams (past & present) and 11 US states represented

Our Amazing Partners:

Stream:
FIRST Updates Now Twitch

Videos:
FIRST Updates Now YouTube

Social Media:

Wishing all the Ri3D teams an amazing kickoff as we start the new season!

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Do you know what states are represented? I’m just a little bit curious…

AZ, DE, IL, MA, MI, MN, NH, NJ, NY, PA, WI, may be a few I’m missing

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Time for some hype!

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Roboty McRobotface

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I think we did something like this a couple years ago with Team Indiana…

Ri3D FIRST Capital Schedule for today

Stream starts at 2pm ET - Whenever it ends in the wee hours (if it does)
We have two shows tonight
8:00pm ET - Infinite Recharge Strategy Breakdowns with Caleb Sykes
9:00pm ET - FIRST Capital Ri3D Recap with Q&A

Giveaways during shows from REV, AndyMark, The Thrifty Bot, FRC 225 and more if you watch live!

Watch live at twitch.tv/firstupdatesnow view archived segments at youtube.com/firstupdatesnow

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Stream should be up and more stable(ish).

We’re testing intake and shooters right now!

watch live at twitch.tv/firstupdatesnow

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Check out some of our videos up on YouTube!
Infinite Recharge Strategic Analysis
Initial Robot Concept
Intake Prototype

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Shooter Prototype! 20+ feet!

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REV Color Sensor testing on the Control Panel (color wheel)

REV Color Sensor Testing Control Panel

REV Color Sensor Testing Bottom of Control Panel

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Love it when a Ri3D channel posts good content. Great work so far, all.

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About to start the Infinite Recharge Analysis and Roundtable! Come join us and win a ReFire Quick Connect Anderson Powerpole!

9pm eastern will be the Ri3D and giving away an AndyMark T-shirt!

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Hopper Helix Prototype

8 Wheel Drive Train CAD

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From the show tonight:

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What was the distance from goal here?

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20 feet

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Just based off of this, I think hitting the back goal is going to happen unintentionally (not saying it’s a bad thing obviously) more then people think.

We can use some basic geometry to find the approximate rate of balls that will enter the inner goal if they are evenly distributed across the outer goal area.

We shrink each target by the radius of the ball, so if the center of the ball is inside each shrunken target then the ball will enter without hitting the edge of the target. The ratio of the areas of the shrunken targets should be the approximate percentage of random shots. This doesn’t account for a number of factors, including that shots are not evenly distributed (more will be closer to the center), the inner goal is offset back into the page (so some balls will fall short), etc.

Edit: I made two mistakes with this, but they nicely cancelled each other out. We should be subtracting 2r (aka the ball diameter) from the goal sizes because they need to shrink from both sides. But also, I accidentally listed the ball’s diameter as its radius. So the final answer is still correct. I updated the drawing to replace ball radius with diameter.

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