When supports are needed in 3D Printing - Mini Project: Build & Apply

When Supports Are Needed in 3D Printing

📖 Scenario: You are preparing a 3D model to print a small decorative object. To ensure the print is successful, you need to decide where to add supports to prevent parts of the model from sagging or collapsing during printing.

🎯 Goal: Build a simple checklist that identifies when supports are needed in 3D printing based on model features.

📋 What You'll Learn

Create a dictionary called model_features with specific features and their angles

Add a threshold variable called support_angle_threshold to decide when supports are needed

Use a dictionary comprehension called supports_needed to mark features needing support

Add a final summary dictionary called support_summary with total features and how many need support

💡 Why This Matters

🌍 Real World

3D printing often requires supports for parts of a model that hang in mid-air or have steep angles. Knowing when to add supports helps prevent print failures and improves quality.

💼 Career

Understanding support requirements is important for 3D printing technicians, designers, and engineers to prepare models correctly and optimize printing processes.

1

Create the model features dictionary

Create a dictionary called model_features with these exact entries: 'overhang_1': 45, 'bridge_1': 60, 'flat_surface': 90, 'angled_surface': 30, 'unsupported_edge': 50. Each value represents the angle in degrees from the horizontal plane.

3D Printing

# Create the model_features dictionary with given features and angles
# Your code here

Need a hint?

Use curly braces to create the dictionary and include all five features with their exact angle values.

2

Add the support angle threshold

Create a variable called support_angle_threshold and set it to 45. This angle will be used to decide if a feature needs support because angles less than this value usually require supports.

3D Printing

model_features = {
    'overhang_1': 45,
    'bridge_1': 60,
    'flat_surface': 90,
    'angled_surface': 30,
    'unsupported_edge': 50
}
# Create support_angle_threshold variable and set it to 45
# Your code here

Need a hint?

Just assign the number 45 to the variable named support_angle_threshold.

3

Identify features needing supports

Create a dictionary comprehension called supports_needed that goes through model_features and sets each feature's value to true if its angle is less than support_angle_threshold, otherwise false.

3D Printing

model_features = {
    'overhang_1': 45,
    'bridge_1': 60,
    'flat_surface': 90,
    'angled_surface': 30,
    'unsupported_edge': 50
}
support_angle_threshold = 45
# Create supports_needed dictionary comprehension to mark true if angle < support_angle_threshold else false
# Your code here

Need a hint?

Use a dictionary comprehension with feature, angle in model_features.items() and compare angle with support_angle_threshold.

4

Add a support summary

Create a dictionary called support_summary with two keys: 'total_features' set to the total number of features in model_features, and 'features_needing_support' set to the count of features marked true in supports_needed.

3D Printing

model_features = {
    'overhang_1': 45,
    'bridge_1': 60,
    'flat_surface': 90,
    'angled_surface': 30,
    'unsupported_edge': 50
}
support_angle_threshold = 45
supports_needed = {feature: (angle < support_angle_threshold) for feature, angle in model_features.items()}
# Create support_summary dictionary with total_features and features_needing_support counts
# Your code here

Need a hint?

Use len(model_features) for total features and sum(supports_needed.values()) to count how many are true.