Z callibration Mini Kossel
thingiverse
I'm keen to fine-tune my kossel without relying on auto-calibration. The main challenge was figuring out a more effective way to control the Z endstops. In reality, what you need is an electronic endstop - specifically an Optical Endstop Switch for use with CNC 3D Printer RepRap Makerbot Prusa Mendel RAMPS 1.4. To access this component, visit http://www.ebay.nl/itm/400545910883?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT - it's listed at a single bolt and 3 x 35mm nuts, as well as one nylon nut with a diameter of 3mm.
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