A maker built a real-life transformer robot that switches from a car to a robot, just like in the movies. The build is designed for someone to ride, much like a toy car. The robot uses Gimson Robotics 99.5:1 gearhead motors with additional 3D-printed two-stage gear reductions. Six motor assemblies power all leg joints.
It uses AS5047 magnetic encoders to track joint positions, allowing the computer to know where each part is. The robot is built largely by 3D printing using LulzBot TAZ 8, TAZ Long Bed (1.2mm nozzle), and LulzBot Mini 3 printers. The structure is built on a T-slot aluminum extrusion with 3D printed connection plates, T-nuts, and M5 socket cap bolts. It uses box sections for the strength to support the builder’s weight when folded.
It uses a Teensy microcontroller, BTS7960 motor drivers, Dual 3S LiPo batteries in parallel with an emergency stop relay, and smooth motion programming instead of jerky movements. Dynamixel servos (100 kg-cm torque) and 270-degree servos (20 kg-cm) are used for moving the panels and arms. The system operates on both 12V and 6V systems. V-Wheels slide the shoulders out on tracks, the hood flips down to become a chest, the head pops up automatically, and hands fold using gravity.
Movement is supported by two 10-inch hoverboard wheels in the back and casters in the front. EBike ESCs are used, but steering is a bit difficult as it currently is. Body panels are made from foam boards with 3D-printed details. The LED lights and silver paint give it that sci-fi look. The robot can transform and drive, but not walk yet. The creator suggested adding omniwheels, allowing better maneuverability and potentially letting the robot drive while standing.
