Any Size 3D Printer

thingiverse

Update: tidied scad files up and modified x-carriage to use end stop boards (I have not yet printed the new design, as I have decided to go XYcore). Some of the STL files will need to be seperated in your slicer to land them on the bed, you will also need to do that to make smaller print runs by removing some of the parts. This is a RepRap 3D printer evolved from the orignal Mendel. It uses 2020 T-slot section for the frame rather than 8mm threaded rods. It has a single z-motor using a belt to drive 2 lead screws. The y-carriage uses a lead screw rather than a belt attached to the bed. I also took some time to get the x carriage belt to pull along the axis of one of the 8mm rods, with the possibility of quick change extruders/cutters/etchers in mind. The size of the printer is determined by the length of the rods and lead screws you choose to use, which then drives then lengths of t-slot you need. The original objective was to gain a better z-height as this was constraining some of my prints. I also wanted a more adaptable and physically open design to make changing extruders nozzles and cleaning the bed less of a fiddle. I have kept the x-carriage horizontal. I have increased the distance between the rods from the original Mendel to better fit the MK8 extruder. But if you want to fit an existing x-carriage you can chage it back (x_rod_centers parameter in CommonDimensions.scad). All the moving parts are inside the frame so I do not catch my jumper on the sticky out bits, it also has the potential for boxing the printer away from the dust and the fumes away from me. I have had it wired up and working using a RAMPS board and Marlin firmware, but another project beckoned before I bit the bullet and replaced my trusty old mendels, so I have never been through he pain of comissioning it, or seen how wobbly it might get when working at height.