Yesterday my daughter came home, telling me that one of the buckles of her backpack was broken. "One more job for my Felix ..." I thought an started immediately to design a piece that would fit the female counter part.


I needed three prototypes that did not fit well. The forth print was finally what I expected it to be. Strangly the last print, with 150 microns, was better than all the previously with 10 microns.

First try Final piece Final piece clipsed into female counter part

 3D model [STL] [GCODE]

As my daught broke the new piece again, I adjusted the design in order to enforce the weak points (cf. the ligh blue parts).

Buckle SE

 3D model [STL] [GCODE]