Calibrate first
Most defects come from calibration. Bed level, Z-offset, E-steps, PID — verify these fundamentals before digging deeper.
— Visual diagnostic
Spot the defect on a thumbnail.
Click the defect that looks like yours, or use the questionnaire to filter by context. You get the fixes to apply — in order.
Which defect do you see?12 listed
Click a defect to see details ↓
— Step 1 of 2 · context
Where does the defect appear?
Pick a category above, or click directly on a thumbnail on the left.
— Catalogue
All defects, in detail.
Each card shows a visual diagram, the symptoms, the likely causes and step-by-step fixes.
— Tips
Before tearing it apart.
Keep filament dry
Nylon, PETG, TPU, PVA, PC are hygroscopic. Store in airtight containers with desiccant. Crackling = wet filament; dry it 4–8 h at 50–65 °C.
One variable at a time
Change a single parameter, print a test, evaluate. This methodical approach tells you what actually fixed the problem.
Use dedicated tests
Temperature tower, retraction test, Benchy, bridging test. Faster than reprinting the full model every time.