Two Small Flaws That Ruin an Otherwise Perfect Part
Even a perfectly dimensioned print can look amateur if it has a line of blobs down one side (the Z-seam) or wisps of plastic between features (stringing). Both are fixable with two ideas: where the layer starts and how the nozzle behaves between moves. Here is how to tame them across the four filaments most makers use.
What the Z-Seam Is
Every layer starts and ends at a single point, and the printer must raise the nozzle there — that pause can leave a small defect. The trick is to place that seam somewhere it won't be noticed and, on single-wall parts, reduce it with coasting and wipe settings.
| Material | Recommended Seam Mode | Retraction Distance | Retraction Speed | Key Tip |
|---|---|---|---|---|
| PLA+ | Sharpest corner / back | 0.8–1.2mm (direct) | 35–45mm/s | Lower temp reduces blobs |
| PETG | Back / aligned | 0.8–1.4mm (direct) | 30–40mm/s | Slightly wet → dry first |
| ABS | Back / aligned | 0.8–1.2mm (direct) | 35–45mm/s | Enclosure for drafts |
| TPU | Aligned / back | 1.5–2.5mm (direct) | 20–30mm/s | Slow speed, no ooze cuts |
Fighting Stringing, Material by Material
- PLA+ — strings when nozzle too hot or retraction too short; drop temp 5–10°C and test.
- PETG — classic culprit because it loves moisture; a dry spool often halves stringing instantly.
- ABS — prefers draft-free heat; retraction tuning plus a stable chamber works wonders.
- TPU — soft filament must retract gently; use slower speed and a slightly longer distance set in the profile (see ANTINSKY TPU 85A).
Three Slicer Moves That Help Every Material
- Wipe / coast — reduce residual pressure at the nozzle tip before travel.
- Travel routing — let the slicer avoid crossing open spaces to hide strings far from view.
- Z-hop — a tiny lift clears surface contact but set it low to avoid a new seam.
Keep the Spool at Its Best
All four materials benefit from dry storage. A dedicated dryer such as the ANTINSKY FilaBox keeps PLA+ and PETG crisp, and helps TPU behave during long prints. Dry filament is simply easier to print cleanly.
Wrap-Up
Clean surfaces come from small, material-aware adjustments, not magic. Position the Z-seam on a corner, set retraction with the table above, and keep the spools dry. Test one change at a time and your prints will look production-ready instead of hobby-fussy.