Extruder Grinding
Extruder Grinding is when there are grind marks on the filament after it passes the extruder.
Also see Extruder Skipping.
A reduced print speed might help prevent Extruder Grind.
A higher Nozzle Temperature might help prevent Extruder Grind.
Check for a Clogged Nozzle.
Also see Ender 3: Extruder Grinding.