3D Printing Not Smooth? Fix Surface Quality in 3 Passaggi chiave

architecture 3d printing

Nothing is more frustrating than finishing a 3D print—only to find its surface bumpy, a strati, or uneven. Whether you’re making a prototype, a decorative piece, or a functional part, smoothness matters for both look and performance. La buona notizia? Most surface issues aren’t hard to fix. This article breaks down 3 core solutions (Selezione del materiale, Impostazioni di stampa, post-trattamento) to turn rough prints into smooth, Risultati professionali.

1. Choose Materials That Boost Surface Smoothness

The right filament is the foundation of a smooth print. Using materials ill-suited for your project often leads to grainy or uneven surfaces. Di seguito è riportato un confronto di 3 common filaments—focused on their surface quality and ease of use:

Tipo di filamentoLa levigatezza superficiale (1=Rough, 5=Smooth)Meglio perKey Tip for Smoothness
Pla3–4Prototipi, giocattoli, parti decorativeUse high-quality PLA (avoid cheap brands) to reduce stringing.
Addominali4–5Parti funzionali (PER ESEMPIO., custodie telefoniche)Print in an enclosed printer to prevent warping (warping causes uneven surfaces).
Petg4–5Durable parts (PER ESEMPIO., bottiglie d'acqua)Dry the filament first—moisture causes bubbles on the surface.

Common Question: Why does my PLA print still look rough?

PLA is easy to print, but low-quality PLA (Sotto \(20 al kg) often has impurities. These impurities melt unevenly, leaving tiny bumps. Upgrading to mid-range PLA (\)25–$30 per kg) can instantly improve surface smoothness.

2. Optimize Print Settings to Eliminate Roughness

Even the best filament will produce a bad print if your settings are off. Two critical settings—Velocità di stampa E altezza strato—are the main culprits behind uneven surfaces. Let’s break down how to adjust them:

2.1 Slow Down Print Speed (IL #1 Fix for Bumps)

Printing too fast (over 60mm/s for most filaments) causes the printer’s nozzle to move before the plastic fully melts and adheres. This leads to:

  • Separazione di strati (visible lines between layers)
  • Stringa (fili di plastica sottili tra le parti)
  • Blobby surfaces

Soluzione: Use this speed guide based on filament type:

FilamentoRecommended Speed RangeResult of Following This Guide
Pla40–50 mm/s50% superficie più liscia; less stringing
Addominali35–45mm/sReduced warping; even layer adhesion
Petg30–40mm/sNessuna bolle; finitura lucida

2.2 Lower Layer Height for Fine Details

Layer height is the thickness of each plastic layer the printer deposits. A large layer height (over 0.2mm) makes layers visible—like stacking thin pancakes with gaps. A small layer height (0.1–0.15mm) creates a seamless surface.

Esempio: If you’re printing a figurine (where smoothness matters), set layer height to 0.12mm. For a simple storage bin (where function matters more), 0.2mm is okay. The tradeoff? Smaller layer heights add ~10–20% to print time—but the smoothness is worth it.

3. Post-trattamento: Turn Good Prints Into Great Ones

Even with perfect materials and settings, some prints need a final touch to be fully smooth. Di seguito sono riportati 3 easy post-treatment methods—ranked by effort and results:

3.1 Levigatura (Most Accessible Method)

Sanding is the simplest way to smooth rough surfaces. Segui questi passaggi:

  1. Inizia con 120-carta vetrata a grana to remove large bumps (PER ESEMPIO., linee di strato).
  2. Passa a 240-carta vetrata a grana to refine the surface (reduces scratches from 120-grit).
  3. Finire con 400-carta vetrata a grana for a near-mirror finish (great for decorative parts).

Per la punta: Sabbia nei movimenti circolari, and use water (wet sanding) for PLA/PETG—it reduces dust and makes the surface smoother.

3.2 Lucidare (For a Glossy Look)

Dopo la levigatura, polishing adds shine. For PLA/ABS/PETG:

  • Usa un plastic polish (PER ESEMPIO., Novus Polish) or even toothpaste (non-gel, bianco).
  • Apply a small amount to a microfiber cloth and rub in circular motions for 2–3 minutes.
  • Wipe off excess polish—you’ll see a glossy, superficie liscia.

3.3 Pittura (Covers Imperfections)

If sanding/polishing isn’t enough, painting hides small flaws. Usa questi passaggi:

  1. Clean the print with isopropyl alcohol to remove dust.
  2. Applicare a primer (PER ESEMPIO., Krylon Fusion for Plastic)—primer fills tiny gaps and helps paint stick.
  3. Paint with acrylic or spray paint (2–3 thin coats, non 1 thick coat—thick paint drips).

La prospettiva della tecnologia Yigu

Alla tecnologia Yigu, we often hear users say “my 3D print isn’t smooth”—and 90% del tempo, the issue is a mix of material choice and speed. Our printers come with pre-set “smooth mode” profiles for PLA/ABS/PETG, which adjust speed (40–50 mm/s) and layer height (0.15mm) automatically. We also recommend starting with ABS or PETG for functional parts—their higher melting points create more consistent layers than PLA. Ricordare: smooth printing isn’t about expensive tools—it’s about matching materials, impostazioni, and post-treatment to your project.

Domande frequenti

  1. Q: My ABS print has a smooth surface but warps—how do I fix both?

UN: Deformazione (edges lifting) happens because ABS cools too fast. Print in an enclosed printer (trappola calore) and set the bed temperature to 100–110°C. This keeps the print flat E maintains surface smoothness.

  1. Q: Can I get a smooth surface without sanding?

UN: SÌ! Use a “layer adhesion” setting in your slicer (PER ESEMPIO., Cura’s “Wall Line Count”)—increasing wall lines (da 2 A 4) makes the outer surface denser and smoother, Nessuna levigatura necessaria.

  1. Q: Why does my PETG print have tiny bubbles on the surface?

UN: PETG absorbs moisture from the air. Dry the filament in a filament dryer (40–50°C for 4–6 hours) before printing—this removes moisture and eliminates bubbles.

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