Click Here for the CAD STEP File!

Purchasing this item will grant access to the Fusion F3Z assembly for the robot; however, the STEP assembly is available for free at the link above. 

No need to actually buy this item, it's just a way to give me an optional donation :)

Sonic V3 recently placed 2nd at the MIT House Battle antweight event, with wins over former champion bots, and has proven reliable enough to be a design worth sharing. Note that this SHOULD NOT BE YOUR FIRST EVER COMBAT ROBOT. Sonic is fairly difficult and unpredictable to drive, and sports a spinning weapon that can cause real harm to a person, so it should never get spun up outside of a proper test box. 

You are given free access to the CAD (computer-aided design) files, which would allow a knowledgable person with a 3D printer to replicate the robot as designed. Feel free to modify the CAD as you see fit or just use it as a reference/learning tool. You can make a copy of Sonic as designed if you wish, as long as you give it a unique name and color scheme. 

There are no warranties, instructions, or further information provided - if you need a substantial amount of help to build this, you probably shouldn't. Note that the wiring and soldering to make this work with a 4-in-1 ESC can be quite difficult, especially for someone inexperienced. You may be able to shave weight elsewhere and use other ESCs, like 3 JCR-RC ESCs, and can also use any receiver option you would like as long as it's powered with the correct BEC/voltage. 

Click Here for the Full Bill of Materials

This is not a physical product, and nothing will be shipped to you if you purchase this item. However, you will gain access to the Fusion 360 native F3Z assembly of the robot, which can make modifying it much easier if you use Fusion. 

Safety Disclaimer

Warning: combat robots are not toys! They can be extremely dangerous. Click here for a safety video.

Testing a robot with an active spinning weapon should never be done while maintaining a line of sight with the robot. Ideally, you should be testing inside an enclosed box or arena with at least 1/4" thick polycarbonate windows or top to see through, and 1/2” or thicker plywood or MDF construction. Operation (Including testing) outside of a suitable arena or test box could cause serious injury. By purchasing this product you acknowledge that you are responsible for the safe use of this product and that Just ‘Cuz Robotics or its employees are not liable for any injuries or damages.

Tips and Tricks:

Note that the robot must be under 454 grams (1lb) to legally compete at an event, and you will need to source or design a weapon lock as well. In order to make sure the robot is under the weight limit I recommend 3D printing the chassis + lid with 3 walls on a 0.6mm nozzle printer or 4 walls on a standard 0.4mm nozzle. The LEGO wheels featured in the CAD here are a bit heavier than the cast urethane ones Seth uses, but with short enough wires and a 3S 300mAh LiHV battery, the robot should still be just within the weight limit. Stepping up to a 3S 380mAh LiHV is recommended, but may require custom wheels or other modifications.