Prusa i3 MK3 Low Profile Spool Holder

thingiverse

The standard Prusa i3 MK3 spool holder takes up nearly all available space in the height direction due to its almost vertical position. I had a strict height constraint since my printer was going to sit on a shelf, prompting me to design a solution to make it fit. This spool holder is angled backward, allowing the spool to rest 2 inches lower and just behind the top of the frame. The thumbnail compares this low-profile spool holder with the original Prusa MK3 spool holder STL. I have successfully installed this spool holder on my MK3 and printed parts without any issues related to filament roll-off or other problems. The model prior to 2018-03-25 had a protrusion on the frame clip that could hit the extruder head while printing tall parts, as shown in an attached image. This issue has been resolved in the updated model by reducing the protrusion, preventing any potential damage during printing.