Robo Sumo Competition Guide
Complete Engineering Guide: Ring Edge Detection, High-Friction Tires, Wedge Dynamics & Autonomous Tactics
What is Robo Sumo Competition?
Robo Sumo is a competitive event where two robots attempt to push each other out of a circular ring (Dohyo) in an autonomous or RC duel, relying on high downward magnetic force, razor-sharp front ground wedges, and ultra-high-friction silicone wheels.
Typical Dohyo Ring Specifications & Rules
Arena & Track Layout
The Dohyo is a circular wooden or steel platform (typically 154 cm diameter for standard 3 kg class, or 77 cm for mini sumo) painted matte black with a 5 cm high-contrast white border ring line.
Match & Round Structure
Matches consist of three rounds of up to 3 minutes. The first robot to win two rounds by pushing the opponent out (touching any part of the floor outside the ring) wins the match.
Scoring & Penalties
Yuko points are awarded when the opponent touches the floor outside the ring boundary. If neither robot exits, judges decide based on aggression and center-ring dominance.
Sumo Robot Architecture & Wedge Engineering
Extremely low-profile steel or brass chassis with sharp front scraper wedges machined from spring steel or ground razor blades to get under the opponent's scoop.
Dual high-torque geared DC or brushless motors fitted with custom-molded high-tack silicone rubber wheels designed for maximum friction coefficient (μ > 1.5).
High-discharge 3S (11.1V) LiPo battery capable of delivering instant locked-rotor stall current during head-on shoving matches.
Autonomous microcontroller board integrated with digital distance sensors (Sharp optical IR or Time-of-Flight LiDAR) and fast downward-facing line edge phototransistors.
Typical Rulebook Engineering Bounds (Example Tolerances)
Tactics & Dohyo Preparation
- 1Calibrate line sensors to white ring: ensure line sensors detect white boundary edge in under 2 milliseconds and execute instant emergency reverse/spin routine.
- 2Maintain clean tire surfaces: wipe silicone wheels with isopropyl alcohol before each bout to eliminate all dust particles that reduce surface friction.
- 3Sharpen the front wedge: ensure the front wedge contacts the surface with zero gap across its entire width to prevent opponent wedges from getting underneath.
- 4Program variable search tactics: implement randomized or circular sweeps during initial 5-second autonomous countdown to avoid predictable charges.
Pit Spares & Tools Checklist
- Isopropyl wipes for tire maintenance
- Spare front replacement scraper blades
- Backup downward-looking edge sensors
- Pre-charged LiPo batteries and battery tester
- Hex drivers for rapid wedge height adjustments
Common Tournament Pitfalls & How to Avoid Them
Relevant Competition Kits & Components
TTRC HD 80MM WHEEL
A TTRC HD wheel supplied in white with the stated dimensions, 6mm hub ID and 130 weight value from the source.
- High-Density Heavy Duty Rigid Construction
- Stated Diameter: 88.9 mm with 60 mm Thickness
Enquire for volume
TTRC DGJ 300RPM
TTRC DGJ 300RPM is a geared DC motor designed for robotics and engineering applications, with a 6–18V operating range, 12V rated voltage and the supplied torque specifications.
- Base Motor RPM: 18000
- Operating Voltage: 6–18 V (Rated 12 V)
Enquire for volume
Recommended Training & Courses
Custom Engineering & Chassis Services
Stainless Steel Laser Cutting
Precision CNC cut chassis plates, armor guards, and structural brackets.
Precision 3D Printing
Custom lightweight brackets, sensor mounts, and prototype casings in PLA, PETG, and TPU.
Custom PCB Design & Assembly
Custom motor driver shields, power distribution boards, and microcontroller carrier circuits.
Frequently Asked Questions
Preparing for an Upcoming Robo Sumo Competition?
Our mechatronics engineering team at Coimbatore provides verified hardware kits, chassis fabrication, motor selection advice, and pit spare packages.