Piezo disk bed leveling for 3D printers

thingiverse

Although numerous types of detectors exist for leveling the build stage of a 3D printer, one method stands out as potentially the most accurate and robust while also being likely the cheapest: Njål Brekke's design detailed at http://www.thingiverse.com/thing:707392 has the potential to be amongst the most accurate and robust as well as potentially the cheapest. This design attempts to improve the sensitivity of Piezo disk sensors. A PDF file in the Thing Files includes a description of the method, along with design and constructional details, and a schematic and gerber file for the amplifier. This file was revised on 23rd April 2016 with additional details and an appendix included. There is also a short video available at https://www.youtube.com/watch?v=Oj4e-An6z5s that provides further insight into the method. Update: A parallel mechanism with a nut recess has been added, eliminating the need for a brass insert. The ParallelMechN.stl file was updated on 9th March to reflect these changes.