Resources

Builder-Tested Resources

These are tools, guides, and references we actually use and recommend.

A must-have spreadsheet for combat robot builders at any level. Plug in values like blade diameter, motor KV, and voltage to quickly sanity-check spin-up time, tip speed, and system feasibility before you build.

Several pages were refined by the Organized Chaos Robotics team based on real-world experience. Practical, fast, and surprisingly fun to explore.

Repeat Intro to combat robotics & Repeat robotics combat handbook

Written by Peter Garnache, these handbooks distill years of real competition experience into practical guides covering drivetrain design, weapon tradeoffs, and event-tested decision making.
If you’re serious about building competitive robots, these are some of the best references available.

Fingertech Belt Pulley Calculator

Need one motor to drive multiple wheels, or shock isolation between a weapon and its motor? Timing belts and pulleys are often the answer.

The FingerTech belt and pulley calculator quickly handles center-to-center spacing and speed ratio calculations, helping you dial in reliable belt drives without repeated CAD tweaks or manual math.

Chaos Gear Generator

I wanted to make my own gear generator so I was not reliant on 3rd party gear creation software. This was my first shot at it.

CAD Resources

OCR CAD Library
A collection of cleaned-up CAD files that I personally use in my robot designs. These are intended to be practical reference models for builders looking to speed up their design process or work from proven components.

My Battlebox
CAD files for my personal combat robot arena build. This design was optimized around the materials I already had available, so I recommend treating it as inspiration rather than a strict set of blueprints. If built entirely from purchased materials, I would estimate the cost around $1,500, though my use of reclaimed material brought that down significantly.