Multi-material-test door knob

thingiverse

I designed the door knob with multiple goals in mind - to determine whether it's possible to 3D print an object with a strong thread in nylon, a high-quality surface finish using woodfill and brass fill, a secure grip through flex98a, and an affordable filling material in PLA. In my "print settings" section, I share valuable insights from my personal experiences. As a bonus, the door knob is incredibly versatile and can be easily customized to change its outer form. By adjusting specific parameters in the FreeCAD spreadsheet, you'll see significant changes in the final print. Unfortunately, my MMU stopped functioning during today's firmware update (only a solitary LED light flashes inside), so I won't be able to print the intended item. Instead, the images show my pre-print with noticeable errors included. Still, it's worth noting that the print was made using PETG, Flex98, PLA, woodfill, and brass fill, which isn't too bad. To clarify, printing nylon works well for the structure part, but I did test print the thread part separately to ensure its quality. However, please be aware of a crucial warning: do not attempt to print nylon without understanding the risks involved - it may permanently clog your extruder if left heated even briefly.