Mortar Bot v.3.1 CoreXY 3D Printer

thingiverse

5 October 2019 V.3.5 - As most printed parts have been replaced, I've added this as a separate listing; https://www.thingiverse.com/thing:3889891 25 September 2019 V.3.1b I currently operate two V3 machines. The first (v3.1a) features the four wheel, three path setup, while the second (v3.1b) uses an MGN-9 rail and 2 small wheels on one path for testing comparative effectiveness of either design. The MGN-9 attachment block is uploaded as the v-wheel-top-clamp-rails.stl file. I'll update the v3.1a design to remove extrusions where carriages are not used, introduce tighter belt placement, improved endstop positions and a new cooling fan shortly. 16 September 2019 V.3.1 Between January & September, I've run two of these printers operational to a useful degree, albeit with quality issues related to the effector carriage. A 2020 extrusion, with a direct drive extruder and only 3 wheels was not secure enough. The effector could twist or rotate around the extrusion slightly, resulting in print quality issues on sharp corners. Eventually, I produced the four wheel, three slot design as somewhat of a last resort, to fix this issue, and it worked. 27 Jan 2019 This is a functional prototype printer. I'm still working through minor teething problems with the leadscrews, and have not continued with any development on the printed extruder. At present, I am using a Titan Aero for simplicity's sake. Print results have been excellent. *** 4 Oct 2018 This is a proposal for a third printer, with changes and improvements over the M-Bot V.2: 1. A geared extruder with a hot end mount in the centerline of the effector / Nema motor. 2. Extrusion lengths that can be ordered pre-cut. 3. Reduced total extrusion weight; critically on the X axis. 4. Reduced total cost. 5. Reduced print time for printed components. 6. Simplified calculations and complete BOMs for various build volumes. The files presently uploaded are printed, but untested. They consist of corner pieces for the main belt and motor assembly, with m3 holes for the linear rail carriages to be drilled when those carriages arrive. The effector carriage can either be mounted using a V-wheel, or an MGN-9 rail.