Thumb adjustable z-axis microswitch

thingiverse

This spring-loaded sliding mount is designed for a classic mechanical micro switch, offering 6mm (1/4") adjustment space. Position it near your target and fine-tune the deck height for precision. The parts exhibit excellent close tolerance when printed in PLA. Affordable micro switches can be found on eBay for a few cents each (http://www.ebay.com/itm/261071015810). Printing instructions include one file for all three components, requiring 3 perimeters, 3 layers, a 0.35mm nozzle, and 0.25mm layer height. Infill should be at 90 degrees with 25% density and a fill angle of 90 degrees. To assemble, place an M3 nut in the thumbwheel hole and either press-fit it or use a hot soldering iron for resistance. Secure the nut with a long M3 screw from the thumbwheel. Obtain a suitable spring (e.g., from a ballpoint pen) and trim it to be approximately 25mm (1") in length. Attach another M3 nut at the top of the fixed part, then assemble according to the provided photo. Mount the assembly beneath the smooth rod on the z-axis, ensuring it is securely positioned below the lowest point of travel.