[Underextrusion on outer wall]

ok added thanks.

CFFFP_Fan_Casing.3mf CFFFP_Mixer.3mf

[Underextrusion on outer wall]

yes underextrusion is happening on layer change i try before your advise( retract at layer change,enable coasting,haven't linear advance.spiralize outher counter) but not solved.i thing there is no any problem with the  printer. Now i use purusa silecer no any problem.in the cura software this happens when the circular diameter gets bigger. The other parts written properly.nozzle 0.4 mm wall thicnes 0.8 mm

[Underextrusion on outer wall]

Hi ihave same problem cura 4.9.1 underextrusion on outher wall pla filament. Temp.190° and all cura setting is defoult 0.2 mm draft. Printer is steel i3 and there is no any problem except round surfaces. Has anyone encountered and solved this problem?