H-CUBE - HBOT/COREXY DIY PRINTER - BUILDLOG

thingiverse

Hi ! My idea is to make a tinkering testbed that will be not too expensive to make, more accurate than chinese creations and very susceptible to modification. Basic idea is to make a rather compact (350x350x350mm + overhangs, outside dimensions) Hbot printer that can be converted to CoreXY with change of 2 brackets, adding some idlers and second belt. Z axis platform that can accommodate popular heatbeds like Mk2b or Creality Ender 3 heatbed, with 2 steppers and 4 linear shafts with possibility to change to two linear rails (with change of the shafts to two 20x20 vslot extrusions). Z height changed by different extrusions lenght + longer linear shafts and screws (that's why no linear rails are take into account at first). Hotend mounting plate that can be used with DD (BMG+e3v v6 and clones) or bowden (Creality-like, Micro swiss etc.). X and Y axis with 300mm linear rails. Oriented more to accuracy and stability than high speeds. Frame is designed that top and bottom plates, z platform, steppers and idlers brackets (except x axis beam) can be machined out of two 5x350x350mm Al alloy plates (except x axis beam and hotend plates) using waterjet, cnc router or similar, no bending. I plan to use 20x40mm extrusions and machine them that the ends to be parallel and all the extrusions to have equal length. For electronics part of the project I plan to use SKR v1.4 + tmc2209 (sensorless homing) + bltouch + other spare parts lying around (24v PSU, old mk2B heatbed and others). Please feel free to comment and give me some ideas. The project is at its starting line, I just ordered stock material (al plates) so it's not too late to make some changes in design. Cheers Sorry for that stupid STL file but it cannot be posted without it. The project is mostly about printers frame concept. All the other components are standard parts like nema17 steppers, tr8 screws, vslot extrusions, gt2 pulleys etc. I dont want to publish the design until the first frame prototype is made to verify if it's even usable.