F4 CADathon 11 - Winter 2021 - Live Tonight 8pm eastern

Hello everyone,

The F4 CADathon GDC is pleased to announce that we will be hosting our 11th CADathon from 6pm Eastern of Sunday, December 12th - 8pm Sunday, December 19th. These dates were selected based on the responses from this poll.

For those unaware, a CADathon is like a hackathon but with CAD. People/teams are given a short period of time to CAD a specific thing (in this case a robot) ending with a panel of judges selecting a winner. If you would like to see information about prior events, here are the threads from our second, third, fourth, fifth, sixth, seventh, eighth, 8.5th, ninth, and tenth CADathons.

Team information:

  1. The CADathon duration is 1 week (6pm Eastern of Sunday, December 12th - 8pm Sunday, December 19th)

  2. There will be no limit to CADathon team size IFF everyone on the CADathon team is a member of the same FIRST (FRC etc.) team.

  3. For CADathon teams with members of different FIRST teams, teams may be composed of up to three participants, with limited exceptions

  4. If you are competing solo, but would like to be assigned up to 2 random partners, you can sign up as a “random” in the signup form and we will do our best to match you with a partner using the same software and in a similar time zone.

Teams composed of more than three unaffiliated students are allowed at the discretion of the organizers, with the primary intent of making learning opportunities for new designers more accessible. These will be handled on a case by case basis, and you must contact us before participating in this manner.

We do not have any requirements of participants other than the basic requirements of being willing to participate and having access to CAD software of their choice. Any age, student or not, whether you’ve never done any sort of CAD before or have been designing robots for a decade, are invited to put their skills to the test. If that sounds like you, please sign up below

Submission requirements:

  • For non-Onshape software

    • CAD files in a neutral format (STEP, Parasolid)

    • Native CAD files

    • Submitted via GrabCAD Workbench or Community

  • For Onshape

    • A link to an Onshape document with downloads turned on
  • Any renders of the robot

  • A “pit scouting” document used to explain the design to the judges

  • All files unless otherwise mentioned must be received prior to 8PM on Sunday, December 19th

  • Renders may be submitted or added to the submission until 8PM, Monday the 20th

All files will be checked by the CADathon staff in order to ensure compliance with the rules. Failure to comply with the rules may result in penalties up to and including points or disqualification.

The Judging Process

The following process is used in order to judge the teams: The submissions will be split amount our judges evenly. The judges will score their assigned submissions, and the top teams from their pool will be judged by the other judges. All teams will receive feedback from at least one judge, unless they indicate a preference not to receive feedback.

We are actively looking for judges. If you are interested in being a judge, please complete the judge form here:


Please be sure to join the discord to be up to date with answers to Q&A questions and interacting with other members of the CADathon.

Link to join: http://discord.gg/BExfkH2 31

Sign up form:

The soft deadline for signups is December 11th at noon. We do allow late signups during the event, but please sign up as soon as you decide to participate.

Regardless of what type of team you are (solo, 3 person, FIRST team, etc), ONLY 1 MEMBER OF EACH TEAM SHOULD COMPLETE THE SIGNUP FORM.

If you are competing as a FIRST team, and a member of your team has previously competed in CADathon, the team may use that member’s CADathon team number if they wish, by selecting the “existing team” option:

We are still securing prizes and the awards show date. More information will be posted as it becomes available.


Apologies, the sign up sheet should now be open now.

Hello everyone!

I come bearing gifts of the game manual pre-release and the awards show!

Pre-release game manual (as well as all released information) can be found here:

We are excited to announce that we will once again be partnering with FUN to host the awards show! The awards show will be on January 5th at 8PM Eastern Time.

Before we release the game tomorrow, we have a couple of announcements:

First, REV Robotics has agreed to sponsor the CADathon with a few giveaways, including store credit and their new MAX Planetary Gearbox!

Thank you REV for your support!

Lastly… we have a teaser of the game logo. The F4 GDC is proud to present…


The CADathon GDC is proud to present Tilt Shift

You can find the game manual here: https://docs.google.com/document/d/1ynYfuKPXyR3cytz_HU-oRXMlP_4aaSq4HhAE19bZBNE
Team List: CADathon 11 Public Team Release - Google Sheets
See all of the event documents in this folder: CADathon 11 Release - Google Drive
View and download the field CAD (Onshape): Onshape

For any formal rule clarifications, etc. Please ask them via the Q&A form: https://forms.gle/1t2NkF2gv9JaTkGR7
And you can view pending and answered questions here: Public CADathon 11 Q&A - Google Sheets

A reminder that CAD files, and pit scouting sheets are due at 8pm EST on Sunday, December 19th, renders can be submitted until 8pm EST on December 20th. Good Luck Teams!


F4 is ready to present the awesome designs submitted. Get your team on live to get inspired for kickoff at 8pm eastern tonight at Twitch

Here’s some of the components created from 3 different teams for the event. tetras


Congratulations to the winning teams of CADathon 11

1: 713 Safty Tips
2: 754 TECBOT
3: 345 The Meme Team

We have the scoring/link sheet available here for this CADathon: CADathon 11 Scores Release - Google Sheets

Unfortunately, due to a miscommunication on my part with the judges, we will not be providing feedback sheets for this CADathon. I sincerely regret this, but they will be making a return for CADathon 12 this summer.

Congratulations to all participants-- stay safe and have an excellent build season!

I expect this will come as a disappointment to many. Could you not just ask the judges to look at the robots again for like 30 seconds to give the teams the feedback they deserve?

(Didn’t even do the cadathon, just my two cents)


If teams would like that style of feedback, it is already present on that score sheet.

I consider it an unreasonable expectation on our judges to cram in feedback at the quality I would expect between now and kickoff, and entirely unreasonable for it to extend for them (and, frankly, participants) past kickoff, based on past observation of how “extended” feedback periods go.

Given that neither of those routes are acceptable, we’ll be taking a look at our process around judging and communication to judges to avoid a repeat of this in the future. We’ve been taking strides to put on as good of an event as we can, and feedback is a very important part of that vision.

I don’t expect anyone to be happy about this. I’m certainly not.


CADathon 11 is now uploaded to YouTube: https://youtu.be/UHMPTAhEFE4

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