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

The Dual Extrusion 3D Printing Module for Snapmaker 2.0 is Available for Pre-order! - #39 by CNC-Maker - Snapmaker 2.0 - Snapmaker: where creation happens

troubleshooting - Infill failure when printing larger prints - 3D Printing Stack Exchange

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

creality cr 6 - Quantum PLA stops extruding, other PLA works fine - 3D Printing Stack Exchange

Material Extrusion - an overview

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

Extrusion-based 3D (Bio)Printed Tissue Engineering Scaffolds: Process–Structure–Quality Relationships

3D Metal Extruder Aluminum supported 1.75mm Filament, suit for LK1 / LK4 / LK4 Pro / LK5 Pro and other FDM printers

LONGER 3D 0.4mm Red Metal Extruder Aluminum for 1.75mm Filament Suit for LK1 / LK4 / LK4 Pro / LK5 Pro, Also Supporting Other 3D Printers

Accelerating 3-D printing, MIT News