SumoBot Competition

The SumoBot Competition is designed to be an affordable and entry-level robotics competition for schools and robotics organizations looking for an engaging competition outside of the mainstream more cost-prohibitive competitions like First Tech Challenge, First Robotics Challenge, and Vex Robotics Competition. The spirit of the Sumo Bot Competition is for each robot to have an initial cost of about $50 and the majority of the robot's parts and components to be reusable for each new year you participate. 

This page will cover the rules and regulations as well as the sample lessons to build and wire a Sumo Bot for the official MakerLessons Sumo Bot Competition. Below will be the full breakdown of the rules and regulations for the MakerLessons' Sumo Bot Competition.  These rules set up a baseline set of instructions and constraints that will encourage innovation and creativity in this design challenge as well as keep the competition fair between teams. Use these pages to start your own local competition between schools, classes, or students!

MakerLessons' SumoBot Competition Rules and Regulations

Objective: Design a 12V-powered SumoBot with the force to push or gently disable an opponent’s SumoBot off a round Sumo-Ring having an 8-foot diameter. Robots should be designed keeping in mind the spirit of a real Sumo Wrestling match where they knock their opponent out of the ring or flip, pin, or cause their opponent to hit their knees. Sumo Bots are meant to gently knock their opponent out of the ring, gently flip, or otherwise temporarily disable their opponent. Disclaimer: This competition is not meant to simulate BattleBots where they destroy each other. Sumo Bots should be reusable in a tournament bracket-styled competition.

Energy Source:  The host of the competition should supply a 12V DC Power Supply. This means the controllers must be able to connect the power supply via alligator clips. As a league, you could choose to use 12V batteries onboard the robot but this will have to be considered in the weight of the robot and will add additional cost to each entry. 

Maximum Weight: SumoBots may be up to 6 pounds. They can be less but keep in mind that a heavier robot will usually perform better when trying to push another heavy robot. SumoBots that exceed the weight limit should not be allowed to compete until they reach 6 pounds or less since it will give the robot an unfair advantage. 

Maximum Size: The SumoBot must fit inside an 8.5” x 11” (a sheet of legal paper) rectangle at the start of the match. There is no height limit. The SumoBot may expand to any size after the start of the match. 

Components: Teams may use commercially supplied materials and components but teams (students only) must show that they designed and fabricated the majority of the SumoBot including the chassis, body and transmission. Use of a commercially purchased robot or kit is prohibited. 

Allowed Materials include but are not limited to:

Motors: Teams may use any kind and number of DC motors not to exceed a continuous current pull of 1 amp total. When DC electric motors start spinning, they will have a spike in current pull and then settle down to a relatively steady current under a single operating condition. Be sure to check what the current pull is when the robot is driving freely and when the robot is under load- load being the additional 6 pounds of the robot it may have to push out of the way. 

Control: RC and other wireless controls are prohibited. This is to keep costs down for all teams and keep it fair between all schools and organizations depending on external budgets. The electronic control boxes must be designed and fabricated by the students. The control box may be opened at check-in so that the judges can inspect it. The control box must provide the SumoBot with sufficient maneuverability to provide a credible threat to the opponent’s SumoBot. Each SumoBot must have its own control box hard-wired to the SumoBot. Teams may not share control boxes. Details on how to make these controllers are on the "SumoBot Controller Page."

Controllers will all be tethered meaning there will be a cable between the controller and SumoBot. All tethers must be at least 10’ long when measured from the car to the control box. The SumoBot may not be pulled or kept from being pushed by pulling on the tether. The tether may not be used as a weapon to strangle the opponent’s vehicle. A SumoBot may not damage its opponent’s tether. The tether should be kept behind the vehicle as much as possible. The judge will stop the clock and untangle the tethers if they interfere with the SumoBots. 

Field/Ring: If possible, the SumoBots will battle on an 8’ diameter round platform consisting of a non-painted plywood surface that will be 2" off the floor. The surface will be neither perfectly smooth nor perfectly level. The hosting school or organization can also just tape out an 8' ring on the floor. It is easier to see the robots go out of bounds when the robots can fall off the platform a few inches onto the ground. 

Tournament Format: The suggested competition format is a double elimination bracket. This allows each team a guaranteed two battles if they lose them. Each match will pit two SumoBots against each other for two minutes in an attempt to knock the opponent off the platform or temporarily disable the robot by gently flipping them. The winner is the last SumoBot remaining on the table and still able to move. If A SumoBot becomes incapacitated for whatever reason, then that bot is the loser of the match. During the main two-minute game, both robots must be moving. If both SumoBots remain on the table after 2 minutes, then a 30-second overtime period will be added. If both robots still remain on the platform after 30 seconds, the winner in overtime will be the SumoBot closest to the center of the table at the end of the overtime period. \

Do Not's

Suggested Registration Rules