filament - No extrusion, but manual extrusion works - 3D Printing Stack Exchange

I just bought and build my first 3d printer (HE3D K280 with Marlin) and I'm encountering some problems with Cura 4 and Repetier. When I load and slice a part, the printer does not extrude anything

How to configure PrusaSlicer to prevent printing in the air - 3D Printing Stack Exchange

ultimaker cura - Under extrusion caused by sharp turns(?) - 3D Printing Stack Exchange

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Creality Official Ender 3 Extruder Upgrade Metal MK8 Bowden 3D Printer Parts for Ender-3 V2/Ender-3 Pro/Ender-3 Max CR-10/10S Gray Aluminum 1.75mm Filament 3D Printer Extruder Drive Feeder : Industrial & Scientific

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extrusion - Filament gets coiled inside the extruder - 3D Printing Stack Exchange

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eSUN Silk Magic PLA Filament 1.75mm, Shiny Silk Dual Color Co Extrusion 3D Printer Filament, 1KG (2.2 LBS) Spool 3D Printing Color Change Filament for 3D Printers, Rose Red Blue

print quality - I am experiencing some severe under extrusion - 3D Printing Stack Exchange

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ultimaker cura - Under extrusion, looking for specific information - 3D Printing Stack Exchange

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Anycubic Kobra Neo 3D Printer, Pre-Installed 3D Printers with Direct Drive Extruder High Precision Printing and Easy Model Removal for Beginners Print Size 8.7x8.7x9.84in : Industrial & Scientific