Sanding and smoothing in 3D Printing - Mini Project: Build & Apply

Sanding and Smoothing 3D Prints

📖 Scenario: You have just finished printing a small 3D model using a common plastic filament. The surface looks rough and has visible layer lines. You want to make it smooth and ready for painting or display.

🎯 Goal: Learn the basic steps to sand and smooth a 3D printed object to improve its surface finish.

📋 What You'll Learn

Understand the initial rough surface of a 3D print

Identify the right sanding materials

Apply sanding techniques progressively

Use smoothing methods to finish the surface

💡 Why This Matters

🌍 Real World

Sanding and smoothing improve the look and feel of 3D printed objects, making them ready for painting or display.

💼 Career

Understanding surface finishing is important for 3D printing technicians, model makers, and product designers to deliver high-quality prototypes and products.

1

Identify the rough surface of the 3D print

Create a list called surface_issues with these exact entries: 'visible layer lines', 'rough texture', and 'small bumps' to describe common surface problems on a fresh 3D print.

3D Printing

# Create the list surface_issues with the specified entries
# Your code here

Need a hint?

Use a Python list with the exact strings inside quotes and separated by commas.

2

Set up sanding materials

Create a dictionary called sanding_materials with these exact key-value pairs: 'coarse_sandpaper': 80, 'medium_sandpaper': 220, and 'fine_sandpaper': 400. The numbers represent the grit size.

3D Printing

surface_issues = ['visible layer lines', 'rough texture', 'small bumps']
# Create the sanding_materials dictionary with the specified key-value pairs
# Your code here

Need a hint?

Use a Python dictionary with keys as strings and values as integers.

3

Plan the sanding process

Create a list called sanding_order that contains the keys from sanding_materials in this exact order: 'coarse_sandpaper', 'medium_sandpaper', 'fine_sandpaper'. This list shows the sanding steps from rough to smooth.

3D Printing

surface_issues = ['visible layer lines', 'rough texture', 'small bumps']
sanding_materials = {'coarse_sandpaper': 80, 'medium_sandpaper': 220, 'fine_sandpaper': 400}
# Create the sanding_order list with the specified keys in order
# Your code here

Need a hint?

Use a Python list with the exact string keys in the correct order.

4

Add final smoothing method

Create a variable called final_smoothing and set it to the string 'apply filler primer and polish' to describe the last step after sanding.

3D Printing

surface_issues = ['visible layer lines', 'rough texture', 'small bumps']
sanding_materials = {'coarse_sandpaper': 80, 'medium_sandpaper': 220, 'fine_sandpaper': 400}
sanding_order = ['coarse_sandpaper', 'medium_sandpaper', 'fine_sandpaper']
# Create the final_smoothing variable with the specified string
# Your code here

Need a hint?

Assign the exact string to the variable final_smoothing.