|Figure 1: profile of the printed object. It is about 10 cm wide and 3.5 cm high|
|Figure 2: failed 3D-print|
|Figure 3: filament of failed 3D-print|
|Figure 4: tightening these bolts on the extruder fixed my problem|
|Figure 5: successful 3D-print after tightening the screws on the extruder|
Tightening the bolts that push the filament against the hobbed bolt solved the problem my printer had for a long time.