The printed model has abnormal problems such as stringing/lack of filament/infill
Actual printing materials do not match the slicer settings; for example, using non-Hyper PLA, but having selected Hyper PLA material parameters for slicing.
Feeding is not smooth.
Extruder component anomaly.
Check whether the Teflon tube is deformed, causing difficulty in feeding.
Check the extruder gears for wear and damage.Extruder Abnormality / Extruder Jam / Extruder Abnormal Noise