An open-source, low-cost motorized XYZ micro-manipulator platform achieves sub-micrometer precision for applications like optical alignment, electronic component probing, and microscopy. Built with off-the-shelf stepper motors and a 30 kHz closed-loop controller, it uses magnetic gearing to boost encoder resolution by 30x, enabling steps as fine as 50nm. The parallel kinematic structure and miniature ball joints provide high stiffness and a large range of motion.
Control is via G-code over USB serial, with firmware featuring motion planning and look-ahead for smooth path following. A Python GUI and API simplify integration, offering live camera feed, G-code running, and mouse control. Hardware Version 4.0A improves ball joint design, fixes self-collision during homing, and enhances CAD models with all pins and fasteners.
Users can replicate the project using the BOM, build instructions, and calibration guides, with community support via Discord.
Source: Hacker News · Summarized by HeadlinesBriefing