Building A Micrometer-Level Displacement Sensor With 3D Printed Parts

A DIY displacement sensor built with 3D printed parts and an opto-interrupter achieves sub-two-micron repeatability. The design uses a central stylus with a knife-edge blade that modulates light reaching a photodiode, with circular flexures preventing unwanted movement. Compared to a previous version, this iteration reduces non-linearity, improves repeatability to better than 2 microns, and is significantly easier to mount, making it a practical precision measurement tool despite using relatively crude printed components.

Source: https://hackaday.com/2026/06/30/building-a-micrometer-level-displacement-sensor-with-3d-printed-parts. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.