Mini Kossel zprobe clamp

thingiverse

When constructing a Mini Kossel, a clamp is necessary for preloading springs in the z-probe for automatic bed leveling. I used a terminal block connector, but if you don't have one, consider using a captured hex nut design inspired by triffid_hunter's gear set. The STL file for this part is available, which was designed in OpenSCAD. For the latest SCAD files, visit https://github.com/jcdoll/kossel. There have been updates to this design. Firstly, an STL for the nyloc version has been uploaded. Secondly, after running the printer for a few weeks, the screw vibrated loose from the hex nut, so the SCAD nut dimensions were tweaked to accommodate a nyloc, which is highly recommended. Lastly, after doing some high-temperature prints (230C), the PLA clamp was noticeably deformed, so it's advisable to reprint the part in ABS to avoid any temperature-related problems. To use this clamp, print with approximately 50% infill and insert an M3 hex nut, which should fit snugly and may require pliers. Finally, clamp onto the probe using an M3x8mm or longer fastener.