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Common problem affecting printing quality
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Bad filament quality (e.g. brittle when filament absorbs moisture over time)
What Effect Does Moisture Have on 3D Printer Filament Storage?
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How to quickly check if the PLA filament is wet
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Unsuitable Temperature
Nozzle temperature (melting point)
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https://youtube.com/shorts/NNLzOippOxo?si=JDqaPiB26ZHYR8q6
Under-Extrusion
(source: Under-Extrusion | Simplify3D Software)
Over-Extrusion
(source: Over-Extrusion | Simplify3D Software)
Overheating
(source: Overheating | Simplify3D Software)
Gaps in Top Layers
(source: Gaps in Top Layers | Simplify3D Software)
Weak Infill
(source: Weak Infill | Simplify3D Software)
Gaps Between Infill and Outline
(source: Gaps Between Infill and Outline | Simplify3D Software)
Inconsistent Extrusion
(source: Inconsistent Extrusion | Simplify3D Software)
Stringing or Oozing
(source: Stringing or Oozing | Simplify3D Software)
Layer Shifting
(source: Layer Shifting | Simplify3D Software)
Warping
(source: Warping | Simplify3D Software)
Layer Separation and Splitting
(source: Layer Separation and Splitting | Simplify3D Software)
Vibrations and Ringing
(source: Vibrations and Ringing | Simplify3D Software)
Curling or Rough Corners
(source: Curling or Rough Corners | Simplify3D Software)
More refers to: Print Quality Guide | Simplify3D Software
3D printing works smoothly when ALL the followings are satisfied:
- filament is brought by the "cold end" continuously and get into the "hot end" at the appropriate speed
- hot end is hot enough to melt the filament so that it can flow out continuously, but NOT too hot to make the material too "runny" or even burn them
- extruded material should stick to the heat bed or build plate at the first layer, or to previous layer of the object under construction
Refer to https://3dprinting.stackexchange.com/a/15950/41236 on what happens when "hot end" is too hot or too cold.