Team 254 Presents: ChezyCAD 2020

Team 254 was unable to host Chezy Champs this year and instead we are hosting an online CADathon: ChezyCAD! No cost to signup. See 121 for more information.


  • Chezy CAD is a virtual CADathon hosted by FRC Team 254
    • Like traditional FRC CADathons, teams will be presented with a unique game challenge and will have a limited amount of time to design, model, and submit a solution that effectively addresses the challenge.
    • However, Chezy CAD also pulls inspiration from traditional Hackathons, having teams present and receive feedback from experienced judges.
    • The challenge presented will be for a single mechanism, not an entire robot, and the time allowed limited to a single weekend enables deeper analysis and feedback on specifics from judges.
    • Signup by November 13 11:59pm PST
      • First 45 teams to submit get guaranteed judging, later signups welcome to compete but will not be eligible for judging or awards
      • Signup Form Link 83
  • When
    • Opening Ceremonies and Game Announcement
      • Friday, November 20, 5:30pm PST - 6:30pm PST
    • Submissions Due
    • Presentations with Judges
      • Sunday, November 22, 10am to 5pm PST
        • 25minute, randomly assigned timeslots for presentations and feedback from Judges
    • Closing Ceremonies with Award Announcements
      • Sunday, November 22, 7pm PST - 7:30pm PST
  • Where
    • Ceremonies held via Microsoft Teams links. Judging held in RingCentral rooms (links sent to Primary Team Contact email)
  • Eligibility
    • Team size of less than 5 pre-College students recommended
      • Challenge is for a single mechanism, so limited team size is to ensure all students get full participation
      • Lots of students interested? Register multiple teams!
    • Adult mentor support is allowed, but mentors not allowed to attend judging presentations
    • Teams need at least 2 students to attend judging presentation
  • Judging
    • 8 rooms each with 2 professional industry adult mentors
      • Each room has a minimum of 15 years combined FRC experience
      • Judges are Mechanical Engineers who work at surgical robotics or startup companies in Silicon Valley
    • Exact judging criteria and submission requirements will be presented during Opening Ceremonies on Friday evening
      • Primarily emphasizing strong effectiveness, manufacturability, and performance metrics (weight, speed) with a bit of supporting analysis
      • Less emphasis on aesthetics, excessive/unnecessary detailing, or “creative” but silly/less-performant designs
  • Awards
    • $100, $75, and $50 prizes for top 3 submissions
    • Extra non-monetary recognitions / shout-outs on our website and social media for top Aesthetics, Presentations, and Analysis
  • Signup
    • Signup by November 13 11:59pm PST
      • First 45 teams to submit get guaranteed judging, later signups welcome to compete but will not be eligible for judging or awards
    • Signup Form Link 83

Reminder that signups close this Friday, 11/13, at 11:59pm PST!

So far we have 34 teams signed up for Live Judging presentations, so spots are still available but they are going!

If any teams signed up for or not for Live Judging and want to edit their response, you should be able to do in the form itself, or you can direct message me on Chief Delphi or email me (


If we signed up should we have gotten an email confirming? Just want to make sure everything was filled out correctly. Can’t wait for the CADATHON!

I’ll send an email blast to all teams with the kickoffs details soon.

We’ve now closed signups, and have recruited an extra pair of judges so we will be able to support 5 judging rooms, for a total of 65 teams. There are some teams that signed up after the deadline that will be on a waitlist for judging rooms, but are still welcome to compete.



Hi all,

Thank-you all who have registered for Chezy CAD 2020, Team 254’s online CADathon!


The Opening Ceremonies just concluded, where the Challenge was unveiled, Sessions / Scoring Rubric explained, and questions answered.

Looking forward to seeing some great submissions (this challenge should be quite fun)!

Andrew Torrance

Team 254 Mentor


How does the 48inch max height extension work? Does that mean that you cannot have an arm extends more than 48inches from the floor? Like does that mean you can only extend 12 inches outside of a 36" tall robot?

The 48" is really a maximum vertical dimension for you robot, as if it was still sitting flat on the floor. See some of the images and blue box clarifying language for rules G17 and G18 in the 2020 Game Manual.

If you start with your robot at 36" tall, that means that you can only vertically extend an additional 12" up (and similarly 12" out from the Frame Perimeter).

As you robot goes up, off the ground, the 48" vertical and 12" horizontal extension zone moves, and rotates, with you. It is always measured from the points on your robot where it would traditionally be sitting flat on the ground.

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Can a team still submit if it writes a document explaining why the team did and made certain decisions and how it came to the design if their judging slot is right over a work shift and they are unable to make it to their judging slot?

Please email and we can talk about maybe moving your judging slot to a different time on Sunday.

Unfortuntately only live-Judging sessions will be considered Judged and qualified to win Awards.


According to the game manual, “Teams can use a custom drivebase (new or already designed), but will not be rewarded or judged on the drivetrain itself.” How much detail is required of the drivetrain? For example, will we be penalized if the drivetrain is missing bumper mounting CAD?

In you presentation you said that the dummy mass must be placed in the center of the robot. Does the dummy mass have to be a single mass in the center of the robot, or can it be two (or more) masses placed such that the center of mass of the dummy mass is placed in the center of the robot? In other words, can we make a space claim throughout the center of the robot where the dummy mass would be if it was centered?


Skipping bumper mounting features will be acceptable, since it is not related to the climber or supporting electronics/pneumatics for the climber.

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Multiple masses are fine so long as their combined effect is a with a center of gravity centered (within a 3" diameter circle lets say) of the geometric center of your drivetrain.

Overall robot mass including the drivetrain, climber, electronics, and dummy mass should be between 100 and 125 lbs. That means that with battery and bumper your actual robot mass, for the purposes of climbing analysis will be between 125 and 150 lbs.


Are you able to provide an overall weight for the 254 drivebase? My team is trying to avoid assigning weights/materials to all parts.

The 254 2019 Drivebase, including all the wheels, electronics, etc., but excluding the battery and bumper weighs 31.75 lbs.

The battery weighs ~15 lbs. The 254 2019 Left and Right bumpers combined weigh ~10lbs.


I know that scores will not be released publicly, but once judging is over will we get to know our rank?

While we’re waiting for closing ceremonies, I just wanted to thank Andrew, the judges and everyone involved in putting this together. Our team had a ton of fun and I think it was a super valuable experience for the students, especially some of our newer ones to get their feet wet.


I would like to second this sentiment. It was a great learning experience, and loads of fun to compete in. Hope this continues annually!


This is our submission for the CADathon, Ad Astra!

We had some reliability issues but we’re still really proud of it. :p
Thanks so much for hosting the event, we had a bunch of fun and hope to be there for ChezyCAD 2021.


Xander from Titan Robotics chiming in here. This event was really fun to participate in, and I would like to thank everyone who helped make it possible. The live judging was a great addition that gave us helpful feedback and made the event feel more personal as well.

Here is our Onshape submission: Onshape

Native Solidworks 2019 files:

Analysis Document: Titan Robotics 2022_254 Cadathon Analysis - Google Docs