The Raspberry Pi in ... building block for robotic and CNC applications. [Alpha le ciel] is building this stepper motor module as the first of many Raspberry Pi hats meant to provide the Raspi ...
Turn it over and you’ll find a Raspberry Pi 3 and a CNC hat. The knobs are belt-driven from a pair of NEMA-17 size stepper motors that interface to the knobs with tight-fitting pulleys.