A rough top layer usually comes from weak support underneath, not only the final skin. The fix often starts with infill, cooling, flow, and top-layer count.
A rough top layer usually comes from weak support underneath, not only the final skin. The fix often starts with infill, cooling, flow, and top-layer count.
Start with observation first. Do not change multiple slicer settings at the same time or the real cause becomes harder to find.
Use these as practical starting points, then tune against your printer, material, nozzle, layer height, and model geometry. The safest workflow is one controlled change at a time.
| Setting Area | What to check |
|---|---|
| Top layers | 4 to 6 for 0.2 mm layer height is a common starting range. |
| Infill | 12% to 20% for broad top surfaces; more if needed. |
| Top speed | reduce for cleaner finish. |
| Flow | calibrate before increasing top flow blindly. |
| Ironing | optional finish step, not a structural fix. |
Print a flat-top calibration tile with 10%, 15%, and 20% infill sections. Choose the lowest infill/top-layer combination that closes cleanly.
After the validation print succeeds, save the exact printer, material, slicer, nozzle, layer height, support, bed adhesion, and cooling setup in Profile Vault so the fix becomes repeatable.
Only use tools that match the diagnosis. Common helpful categories include PEI cleaning supplies, filament dryers, nozzles, deburring tools, calipers, support-removal tools, and safe resin handling equipment.
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