bgm

Hello! I have a problem with extrusion. Everytime before the printhead starts extruding filament for a new layer, the used printhead extrudes extra filament. You see the extra filament in the photos. First I tried to change the retraction and the temperature (less) but I gues it's not the problem, because the print result of the actual part isn't that bad. Than I tried it with an ooze shield, but the extrusion didn't stop with the ooze shield, so it's useless. I also tried to print the part with the slicer software simplify3d, but the result is also really bad (see picture). This is my setup: Ultimaker S5 Printcore AA 0.4 Tough PLA (from Ultimaker), Printcore BB 0.4 Brakeaway (from Ultimaker) Printing temperature: 225°C Print Speed: 70 mm/s Do you have any ideas or tips for a successful print?