How to Set Wall Thickness in Slicer for 3D Printing

To set wall thickness in a slicer, locate the Wall Thickness or Perimeter Width setting in your slicer's print settings. Adjust this value to control how thick the outer walls of your 3D print will be, which affects strength and surface finish.

Syntax

In most slicers, the wall thickness setting is a numeric value usually measured in millimeters (mm). It defines the total thickness of the outer walls of your print.

Common related settings include:

• Wall Thickness: Total thickness of the outer shell.
• Wall Line Count: Number of perimeter lines printed.
• Line Width: Width of each printed line.

The formula slicers use is:

Wall Thickness = Wall Line Count × Line Width

none

Wall Thickness (mm) = Wall Line Count × Line Width (mm)

Example

This example shows how to set wall thickness in a slicer like PrusaSlicer or Cura.

Suppose you want a wall thickness of 1.2 mm. If your line width is 0.4 mm, set the wall line count to 3 because 3 × 0.4 mm = 1.2 mm.

python

# Example settings in a slicer configuration file or UI
wall_line_count = 3
line_width = 0.4  # in mm
wall_thickness = wall_line_count * line_width
print(f"Wall Thickness set to {wall_thickness} mm")

Output

Wall Thickness set to 1.2 mm

Common Pitfalls

Many beginners make these mistakes when setting wall thickness:

• Setting wall thickness too thin: This can cause weak prints or gaps in the walls.
• Mismatch between wall thickness and nozzle size: Wall thickness should be a multiple of your nozzle diameter (e.g., 0.4 mm nozzle means wall thickness should be 0.4, 0.8, 1.2 mm, etc.).
• Ignoring line width: Changing line width without adjusting wall line count can cause unexpected wall thickness.

Wrong way: Setting wall thickness to 1.1 mm with a 0.55 mm line width (not a multiple of nozzle size).

Right way: Set wall thickness to 1.2 mm (3 × 0.4 mm) for consistent printing.

python

# Wrong way
wall_line_count = 2
line_width = 0.55  # Not matching nozzle size
wall_thickness = wall_line_count * line_width
print(f"Wall Thickness set to {wall_thickness} mm")

# Right way
wall_line_count = 3
line_width = 0.4  # Matches nozzle size
wall_thickness = wall_line_count * line_width
print(f"Wall Thickness set to {wall_thickness} mm")

Output

Wall Thickness set to 1.1 mm
Wall Thickness set to 1.2 mm

Quick Reference

Tips for setting wall thickness:

• Match wall thickness to nozzle size multiples for best results.
• Increase wall thickness for stronger prints or functional parts.
• Use at least 2-3 wall lines for good surface finish.
• Adjust line width carefully; it affects wall thickness and print quality.

Key Takeaways

Set wall thickness as a multiple of your nozzle diameter for reliable prints.

Wall thickness equals wall line count multiplied by line width.

Too thin walls cause weak prints; too thick walls use more material and time.

Adjust wall line count and line width together to control wall thickness.

Check your slicer's wall thickness setting in the print settings or shell section.