Apex — Comp Line-Follower Chassis
Created today
Description
Apex — Comp Line-Follower Chassis is a high-speed, 3D-printable robotic platform designed around the Arduino Mega 2560 and Pololu QTR-8RC. Built for aggressive track layouts and rapid differential steering, this design drops the center of gravity to the floor while tightly packaging the critical electronics. The front sensor array dictates the pacing, and the custom split-bracket mounting system allows micro-adjustments in both height and lead distance to optimize line acquisition.
Features
- Adjustable QTR Mount: Two-axis bracket for fine-tuning the 8-channel array height and lead distance.
- Low-CG Differential Drive: Transverse 2S battery pocket and dual N20 saddles centered on a 3mm rigid base plate.
- Component-Mapped: Exact clearances for the Arduino Mega 2560, TB6612FNG driver, buck converter, and 35mm racing wheels.
- Wire Routing: Integrated chassis cutouts and zip-tie points to keep logic and power rails out of the wheels.
Print notes
Print the main chassis and brackets in PETG or rigid PLA+ at a 3mm shell thickness. The chassis is natively support-free. Use M2 hardware for the sensor array and M3 for the logic boards and motor saddles.
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