Solve 3D printing problems systematically
When a print goes wrong, the printer itself is not always the root cause. Material, temperature, cooling, geometry and calibration all interact. Instead of changing several settings at once, work through the problem systematically: identify the symptom, check the most likely causes and change one variable at a time.
Fine strings between parts
Stringing
- damp filament
- nozzle temperature too high
- unsuitable retraction settings
- material stuck to the outside of the nozzle
Corners lift from the print bed
Warping
- uneven cooling
- drafts
- difficult material
- small contact area
- unsuitable cooling
The first layers are wider than the model
Elephant foot The lower layers bulge outward and can interfere with dimensional accuracy and fits.
Layers split apart
Poor layer adhesion / delamination
- nozzle temperature too low
- excessive cooling
- unstable ambient temperature
- unsuitable material profile
Check the filament first
Moisture can make several apparently unrelated printing problems worse.
Print start problems
If the first layers aren't sitting cleanly, everything printed after builds on a shaky foundation.
Material flow
Too little or too much material changes dimensions, surface finish and fit alike.
Dimensions & geometry
If a part doesn't fit, a systematic diagnosis beats blanket scaling.
Unsupported geometry
Bridges, overhangs and supports are closely related and often decide the result together.
Mechanics & surface
These issues rarely come from the model itself — they come from mechanics or print dynamics.