Easy Spool Holder - Spool Safety Lock (Prusa MK2 / MK2S / MK3)

cults3d

On my Prusa MK2S, I utilize a very useful End-G Code that raises the extruder to the top left corner after each print has completed. The benefit of this code is that the extruder remains accessible and I can easily switch filaments, verify if the nozzle is still clean, replace the nozzle, preheat without oozing directly onto the bed, etc. The G-Code for this feature is as follows: G1 X0 Y200 Z195; home the X axis and push the Y forward while raising the X axis. For filament samples, I have printed some slim and handy filament spools (you can view them at https://www.thingiverse.com/thing:2091266). The combination of very light filament spools together with the End-G Code occasionally results in the filament spool falling off the Easy Spool Holder at the end of the print, as the extruder moves up and pushes the filament, causing the spool to lack sufficient mass to remain on the holder. As a result, I quickly designed a "safety lock" that can be threaded through the spool and then clicked into place within the left and right spool holder elements. I printed this safety lock very quickly in ABS and it effectively prevents the filament spool from falling off until date. UPDATE 05-12-2017: I have uploaded a REV1 version of the safety lock with a slightly improved fit, as the recess now follows the curvature of the Easy Spool Holder for a better fit.