Rough or Grainy Outer Walls

Document the failure and confirm that it matches this guide: Outer walls look gritty, torn, or uneven despite correct model geometry.

Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.

Check inconsistent extrusion. Inspect extrusion consistency.

Check speed too high. Reduce outer-wall speed.

Inspect vibration or loose hardware. Check motion hardware.

Rule out wet or contaminated filament. Test dry filament.

Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.

Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.