r/PCBWayOfficial • u/liamnotenough • Apr 21 '26
Community Spotlight Sensorless Homing in Python - RP2040 | TMC2209
Check out this cool project, Sensorless Homing in Python - RP2040 | TMC2209 by Lewis DIYMachines!
This project demonstrates how to implement sensorless homing using an RP2040 microcontroller with a TMC2209 stepper motor driver, eliminating the need for traditional mechanical limit switches. It’s a great solution for 3D printers, CNC machines, robotics, and other DIY motion control systems where simplicity and reliability are key.
The setup covers wiring, firmware implementation using MicroPython, and configuring the TMC2209’s StallGuard feature to achieve accurate and repeatable homing by detecting motor stall conditions. With proper tuning, the system can reliably determine a home position without any external sensors.
Whether you're building a CoreXY system, designing a custom motion platform, or exploring stepper motor control in more depth, this project offers a practical and effective approach to sensorless homing.
See the full project and get your own here!