X-Ends-Prusa i3 8mm Threaded Nut

thingiverse

I designed these X-Ends for precise alignment with Z. The 8mm Threaded rods ensure this, learn more below. These Ends also accept LM8UU Linear bearings for the guide rods. Important: When uploading these files into Repetier-Host, I receive a message that they are not "Manifold" & may produce unexpected results. [Slic3r still slices them] I designed these with Sketchup & it says they are fine, as were my prints. Why use 8mm threads?: It's an excellent idea to choose layer heights that divide evenly into multiples of your Z height, having a mismatch of steps as the object builds will cause problems - To explain this - A 200-step motor using 16x micro-stepping gives you 3200 steps, an M8 threaded rod is 1.25mm per complete revolution so 3200/1.25 = 2560 So 1mm of height (Z) movement takes 2560 motor steps, a layer height of 0.3mm takes 768 motor steps. If you set a layer height of 0.32, that requires 819.2 steps - not an even number of motor steps, so it's not ideal. I can set layer heights at .01, .02, .03, or .04 & get precise results every time. I recently printed a 150mm tall screw with exact measurements. Print Settings Printer Brand: RepRap Printer: Prusa i3 - home built - Rafts: No Supports: No Resolution: .02 or .03 Infill: 25% Notes: The 8mm nut fits snugly but use a soldering iron to melt some PLA over the edges to secure it in place