Perrybotics Team 742A · 2023–2024
VEX Competition Robot
A field-ready mobile robot with a motor-sharing PTO
Overview
An 18-inch competition robot developed from strategy through CAD, custom fabrication, odometry, drivetrain tuning, and match testing for the VEX Over Under game.
01
Every motor has more than one job
I designed a power take-off system that shifted two motors between the drivetrain and catapult. Piston-actuated locks changed functions during a match, while a compound gear ratio and ratchet system balanced range, precision, and durability.
The field-ready Over Under competition robot.
02
Build, measure, tune
After CAD reviews I manufactured custom polycarbonate, aluminum, and geared components using laser cutting, mills, saws, and hand tools. Testing focused on straight-line drift, RPM and torque loss under load, intake compression, friction, and tolerance stack-up.
Tools & methods