Overview

We designed and built a line-following robot as the final deliverable for a robotics design course. The robot integrated a variable-distance catapult launcher and rack-and-pinion steering system, combining autonomous navigation with projectile launching capability. We built the system to handle randomized line paths while maintaining accurate tracking and adjustable firing range.

Project Objective

Our objective was to design and fabricate a robotic system capable of following randomized drawn line paths while incorporating a variable-distance catapult launcher and rack-and-pinion steering mechanism. Our goal was to demonstrate integrated mechanical design, control systems, and fabrication techniques within a fully functional autonomous robot.

What Was Done

• We collaborated within a team of four to design, prototype, and fabricate the robot, laser-cutting frame components from acrylic and Delrin for durability and precision fit.

• We designed the drive system and rack-and-pinion steering assembly in SOLIDWORKS and Fusion 360, then 3D printed the parts for integration into the chassis.

• We developed Arduino-based control systems for line following, using sensors and PID controllers to achieve accurate path tracking.

• We used structured project management practices to maintain progress over an extended timeline, including task breakdowns, responsibility assignment, and milestone tracking.

• We cross-trained across mechanical design, fabrication, and programming to ensure continuity when availability varied and to improve system integration quality.

End Result

Our final robot successfully met all performance requirements and delivered reliable line-following and adjustable-range launching functionality. We achieved first place for Best Design at the university robotics design challenge. The project demonstrated strong execution in mechanical design, fabrication, control systems, and collaborative engineering development.