Robotic arm with DC motors and encoder

This robotic arm is inspired by the Zortrax Robotic Arm, but redesigned to work with DC motors with encoders instead of stepper motors. It provides an accessible and functional option for students, makers, and robotics enthusiasts.

Technical Details:

Compatible with DC motors with encoders, making it easier to integrate with microcontrollers like Arduino.

Uses M2.5 gear module inserts for the linkage gears, allowing for standard gear engagement and easy customization.

Integrates four 608 bearings along with two 11 mm metal shafts to support smooth articulation.

The base features a custom-designed bearing race using printable balls. Each ball was modeled as a single printable sphere to simplify the manufacturing process. Once printed, the balls are glued into place for easy assembly.

Fully 3D printable and modular design, requiring only basic hardware and tools for assembly.

Applications:

Educational robotics and STEM learning

Functional prototyping

Testing PID control, inverse kinematics, or simple automation systems

Printing Recommendations:

Material: PLA or PETG

Designed to print with minimal or no supports

Assembles using standard M3 screws

All parts were designed in Fusion 360 and come with ready-to-print STL files.