What Are the Best 3D Printing Settings?

There's no universal "best" setting. It depends on what you're printing and what printer you have.

The honest truth: Your slicer's default profile works 80% of the time. Start there. Don't chase speed unless you have modern high-speed hardware-60mm/s prints great. Infill percentage is mostly fake strength-walls matter way more. Lower layer height = prettier but slower. That's it.

2026 trend: Modern slicers emphasize efficiency - thicker layers where detail doesn't matter, lower infill (10-15% is plenty), variable speeds (fast infill, slow outer walls), and smarter support placement. Default profiles save time and filament compared to older "conservative" settings.

Layer height

What it is: Thickness of each printed layer. Measured in millimeters (mm).

Common layer heights

0.12mm - High detail

Best for: Miniatures, detailed models, smooth curves

Speed: Very slow (50-100% longer print time)

Use when: Print quality matters more than time

0.2mm - Standard (recommended starting point)

Best for: Most prints, functional parts, prototypes

Speed: Good balance

Use when: Default choice for 95% of prints

0.28-0.3mm - Fast draft

Best for: Quick prototypes, test fits, hidden parts

Speed: Much faster (30-50% time savings)

Use when: Testing designs or printing stuff nobody will see. 2026 trend: push to 0.3mm (or 0.32mm max) when detail doesn't matter.

Layer height rule

Keep layer height between 25-75% of your nozzle diameter. For a 0.4mm nozzle: 0.1mm to 0.3mm works (some push 0.32mm for draft). Going outside this range causes problems with extrusion and adhesion.

Print speed

What it is: How fast the nozzle moves while printing. Measured in mm/s.

Speed guidelines

  • 40-60mm/s: Safe starting point for most printers. Great quality, reliable.
  • 60-80mm/s: Good balance of speed and quality for well-tuned printers.
  • 80-120mm/s: Fast printing. Requires proper cooling and tight mechanics. Quality may suffer on details.
  • 150mm/s+: Modern high-speed printers only (Bambu Lab, Voron, etc). Needs good part cooling and tuned acceleration.

Different speeds for different features

Don't use the same speed everywhere:

  • First layer: 20-30mm/s (slow for good adhesion)
  • Outer walls: 40-60mm/s (slower = better surface quality)
  • Inner walls: 60-80mm/s (can go faster, not visible)
  • Infill: 80-150mm/s (nobody sees it, speed it up)
  • Travel moves: 150-200mm/s (no printing, move fast)
  • Supports: 60-80mm/s (quality doesn't matter)

Speed vs quality (2026 context)

Faster printing = more vibrations = lower quality. If your prints look rough or have ringing (wavy patterns), slow down your outer wall speed by 10-20mm/s. For high-speed printers (Bambu, Voron, Klipper-based), acceleration and jerk tuning matters more than raw speed. Modern slicers like Bambu Studio and OrcaSlicer handle this automatically. Most people overestimate how much speed matters.

Infill

What it is: Internal structure that fills the print. Percentage determines how solid vs hollow the inside is.

Infill percentage guide

  • 0-5%: Vases, decorative pieces (use "vase mode" for 0%)
  • 10-15%: Most prints. Saves filament, plenty strong for display pieces.
  • 20%: Standard for functional parts. Good strength-to-weight ratio.
  • 30-40%: Parts under stress (brackets, mounts, tool handles)
  • 50-100%: Rarely needed. Adds weight and time without much strength gain. Use more walls instead.

Infill patterns (2026 favorites)

  • Lines: Fastest pattern. Minimal time and filament. Popular default in 2026.
  • Lightning: Extremely fast, minimal material. Great for non-structural prints or supporting top layers.
  • Cubic/Gyroid: Best strength-to-weight for isotropic loads. Use for mechanical parts under stress.
  • Grid: Fast, decent strength. Classic reliable choice.
  • Honeycomb: Looks cool, slow to print, not actually stronger than cubic. Mostly aesthetic.

Infill truth: Walls provide most of a print's strength. A print with 4 walls and 15% infill is stronger than 2 walls with 50% infill. Don't waste filament and time on high infill unless you need it.

Walls (perimeters)

What it is: Outer and inner shells of the print. Each wall is one nozzle width.

How many walls?

  • 2 walls: Minimum for most prints. Fine for non-functional items.
  • 3 walls: Good default. Provides nice strength and smooth surface.
  • 4 walls: Functional parts, anything load-bearing. Better than high infill.
  • 5+ walls: Very strong parts or when you want thick solid walls.

Why walls matter more than infill

Walls are continuous and bonded to adjacent layers. Infill is often disconnected. For strength: add more walls, not more infill. It's faster and stronger.

Top and bottom layers

What it is: Solid layers that cap the top and bottom of your print.

How many layers?

  • 3-4 top layers: Standard. Fully closes the top surface.
  • 4-5 bottom layers: Better bed adhesion, smooth bottom surface.
  • More layers: Needed if printing with low infill (under 10%).

Top surface gaps?

If you see gaps or sagging on top layers, either increase top layer count or increase infill percentage. The top needs something solid to print on.

Temperature

What it is: Nozzle and bed temperatures. Material-dependent.

Starting temperatures by material

Material Nozzle Temp Bed Temp
PLA 200-220°C 60-70°C
PETG 230-250°C 70-85°C
ABS 230-250°C 90-110°C
ASA 240-270°C 90-110°C
TPU (flexible) 220-240°C 40-60°C

Print a temperature tower to find the sweet spot for your specific roll. Every brand is slightly different.

Retraction

What it is: Pulling filament back into the nozzle during travel moves to prevent oozing.

Starting retraction settings

  • Bowden printers (Ender 3, CR-10): 5-6mm distance, 40-60mm/s speed
  • Direct drive (Prusa, Voron, Bambu): 0.5-2mm distance, 25-45mm/s speed

Too much retraction causes grinding and clogs. Too little causes stringing. See the full guide: How do I fix stringing in 3D printing?

Supports

What it is: Temporary structures to hold up overhangs during printing.

When do you need supports?

  • Under 45° overhang: No support needed
  • 45-60° overhang: Might work without support if print is small
  • Over 60° overhang: Definitely needs support
  • Horizontal holes/bridges: Under 50mm bridges okay, longer needs support

Support settings

  • Support type: Tree supports (modern choice, easier removal) or standard grid
  • Support density: 15-20% is plenty
  • Support Z distance: 0.2mm (one layer) - any closer fuses to model
  • Support interface: Enable it. Creates cleaner contact surface.

Cooling (part cooling fan)

What it is: Fan that blows on the print to solidify layers.

Cooling by material

  • PLA: 100% fan after first layer. Loves cooling.
  • PETG: 30-50% fan. Too much cooling causes layer adhesion problems.
  • ABS: 0-20% fan. Needs to stay hot for layer bonding. Use enclosure.
  • ASA: 0-20% fan. Similar to ABS but more temperature-stable. Enclosure highly recommended.
  • TPU: 30-50% fan. Helps with stringing on flexible parts.

First layer cooling

Always disable part cooling for the first layer (0% fan). You want that layer to stick to the bed, not cool and contract.

Adaptive settings by print type

Quality prints (miniatures, display pieces)
  • Layer height: 0.12-0.16mm
  • Speed: 40-60mm/s (outer walls slower)
  • Walls: 3-4
  • Infill: 10-15% (gyroid or cubic)
  • Top/bottom: 5 layers
Standard prints (functional parts)
  • Layer height: 0.2mm
  • Speed: 60-80mm/s
  • Walls: 3-4
  • Infill: 15-20%
  • Top/bottom: 4 layers
Fast drafts (test fits, prototypes)
  • Layer height: 0.28-0.3mm
  • Speed: 80-120mm/s (if printer capable)
  • Walls: 2-3
  • Infill: 10% (lightning or lines pattern)
  • Top/bottom: 3-4 layers
Strong mechanical parts
  • Layer height: 0.2mm
  • Speed: 50-70mm/s
  • Walls: 4-6
  • Infill: 30-40% (gyroid pattern for best isotropic strength)
  • Top/bottom: 5-6 layers

Common slicer mistakes

  • Using 100% infill: Wastes filament and time. Use more walls instead.
  • Same speed for everything: Slow down outer walls for better quality, speed up infill.
  • Not enabling retraction: Causes massive stringing.
  • Ignoring first layer settings: First layer should be slower and fatter than the rest.
  • Maxing out speed immediately: Start slow, increase speed only after you've proven your printer can handle it.
  • Not tuning temperature: Print a temp tower. Don't just use the middle of the range.

Which slicer to use?

Popular slicers in 2026

  • OrcaSlicer (free, open source): Rising favorite in 2026. Fork of PrusaSlicer/Bambu Studio with more calibration tools and granular tweaks. Great for tinkerers and power users. Works with any printer.
  • Bambu Studio (free): Plug-and-play king for Bambu Lab owners. Fast, polished defaults, modern UI. Works with other printers too.
  • PrusaSlicer (free, open source): Clean interface, excellent defaults. Reliable choice that works with any printer despite the name.
  • Cura (free): Still most popular overall. Works with everything. Tons of plugins. Can be overwhelming for beginners.
  • Simplify3D (paid): Advanced features but expensive. Not worth it for beginners.

Start with whatever came with your printer (Bambu Studio for Bambu, PrusaSlicer profiles for Ender/Prusa). Learn the basics. Then try OrcaSlicer or others if you want more features.

The tuning process

How to dial in settings

  1. Start with slicer defaults: Use the profile for your printer or a similar model.
  2. Print a calibration cube: 20mm cube prints in 30-60 minutes. Shows dimensional accuracy.
  3. Print a Benchy: Boat model designed to test all features. See how overhangs, bridges, curves look.
  4. Adjust one setting: If walls look rough, slow down outer wall speed. If top surface sags, add top layers.
  5. Test again: Small test prints save time vs full-size failures.
  6. Save your profile: Once dialed in, save it. You'll reuse these settings.

Change one thing at a time

Don't adjust temperature, speed, and retraction all at once. You won't know what fixed (or broke) it. One variable per test print.

Quick settings checklist

  1. ✓ Layer height between 0.1-0.3mm for 0.4mm nozzle?
  2. ✓ First layer slower (20-30mm/s) with fan off?
  3. ✓ Print speed reasonable (60-80mm/s for most printers)?
  4. ✓ Using 3-4 walls for strength?
  5. ✓ Infill 15-20% for standard prints?
  6. ✓ Temperature matches your filament type?
  7. ✓ Retraction enabled and tuned for your printer?
  8. ✓ Part cooling appropriate for material?
Bottom line

Use your slicer's defaults. They're good. Print a test (cube or benchy) and see what needs tweaking. Most stuff works fine at 0.2mm layer height, 60mm/s, 3 walls, 15% infill. Don't overthink it. Just print and iterate.

Related: How do I fix stringing in 3D printing? · Why did my 3D print fail?