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

extruder - Printing with PETG, printer says it's out of filament when it clearly is not - 3D Printing Stack Exchange

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

Black-Box All Metal Dual Gear 3D Printer Extruder with 36 Motor, Extrusion Ratio 5:1, Hardened Steel BMG Extrusion Gear, Suitable for 1.75 Filament Ender3/Ender5/CR10Upgrade from ChowThink : Industrial & Scientific

eSUN Silk Mystic PLA Filament 1.75mm, Shiny Silk Three Color Co Extrusion 3D Printer Filament, 1KG (2.2 LBS) Spool 3D Printing Color Change Filament for 3D Printers,Gold Red Green : Industrial

Printability and Shape Fidelity of Bioinks in 3D Bioprinting

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Material Extrusion Additive Manufacturing of Metal

ultimaker cura - 3D Printer does not print whole object - 3D Printing Stack Exchange

TL-D3 Pro Dual Extruder 3D Printer - TENLOG IDEX 3D Printers

print quality - First Layer problems? - 3D Printing Stack Exchange