1lb Combat Robot

Fusion 360 Render of 1lb Combat Robot

Design

I designed a 1lb vertical spinner combat robot. The point of the robot is to disable the opposing robot. I designed and manufactured the components of the robot myself, using PLA and a 3D printer. The primary goal was to maximize the weight of the weapon to increase the destructive power, which allowed for the weapon to weigh .3lb, almost one third of the total weight. The weapon is also designed to "uppercut" other robots, sending kinetic energy upwards through the opponent while the reaction force goes into the ground. Wheels are designed to be large to protect the body as the foam absorbs impact better than PLA, and "ears" were designed to allow the robot to drive when flipped over while still allowing the weapon to spin. The main frame is designed to minimizing weight while maintaining structural integrity.

Weapon

The weapon is designed to optimize moment of inertia to further increase destructive power, as it can impart more energy. Metal impactors were designed to be the furthest edge on the weapon, giving it the highest chance to hit a opposing robot. The weapon is asymmetrical, providing a even higher chance of the impactors hitting due to being able to make a full rotation, creating a bigger moment for a opposing robot to be caught deeper into the weapon. To balance the weapon, it takes on a "tear drop" shape where due to the asymmetrical nature, the shorter side needs to have more mass to account for the mass further out on the longer end. The weapon is directly mounted to the motor, as it meshes with the gaps along with containing holes to use the mounting screw holes on the motor. On the opposing side, a dead bolt and bearing are mounted to support the weapon from both ends.

Fusion 360 Finite Element Analysis of 0.3lb weapon

Picture of 1lb Combat Robot

Manufacturing

The majority of the parts were printed with an Creality Ender 3 v2 3D printer using PLA. The weapon was in printed lengthwise to maximize strength in the direction of impact and prevent chipping, while the rest of the body was printed horizontally to brace for other vertical spinners. Wheel hubs were designed to directly fit onto the drive motor shafts, and duct tape was used for grip and allowing the wheels to hold their shape better.

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