CAD-to-CAM workflow in CNC Programming - Mini Project: Build & Apply

CAD-to-CAM Workflow Automation

📖 Scenario: You work in a small manufacturing shop. You receive CAD files describing parts to make. Your job is to automate the process of preparing these files for the CAM software that generates CNC machine code.The CAD files are represented as dictionaries with part names and their dimensions. You want to filter parts by size, then prepare a list of toolpaths for the CAM software.

🎯 Goal: Build a simple script that takes a dictionary of parts with dimensions, filters parts larger than a size threshold, and creates a list of toolpaths for those parts.

📋 What You'll Learn

Create a dictionary called cad_parts with exact part names and dimensions

Create a variable called size_threshold with a numeric value

Use a dictionary comprehension to filter cad_parts for parts larger than size_threshold

Create a list of toolpaths named toolpaths from the filtered parts

Print the toolpaths list as the final output

💡 Why This Matters

🌍 Real World

Automating the CAD-to-CAM workflow saves time by quickly preparing only relevant parts for CNC machining.

💼 Career

Manufacturing engineers and CNC programmers use such scripts to streamline production and reduce manual errors.

1

Create the CAD parts dictionary

Create a dictionary called cad_parts with these exact entries: 'Gear': 50, 'Bracket': 30, 'Shaft': 70, 'Plate': 40

CNC Programming

# Create the cad_parts dictionary with exact entries
# Your code here

Need a hint?

Use curly braces to create a dictionary with the exact part names and sizes.

2

Set the size threshold

Create a variable called size_threshold and set it to 45

CNC Programming

cad_parts = {'Gear': 50, 'Bracket': 30, 'Shaft': 70, 'Plate': 40}
# Create size_threshold variable and set it to 45
# Your code here

Need a hint?

Just assign the number 45 to the variable named size_threshold.

3

Filter parts larger than the threshold

Use a dictionary comprehension to create a new dictionary called filtered_parts that contains only parts from cad_parts with sizes greater than size_threshold

CNC Programming

cad_parts = {'Gear': 50, 'Bracket': 30, 'Shaft': 70, 'Plate': 40}
size_threshold = 45
# Create filtered_parts dictionary with parts larger than size_threshold
# Your code here

Need a hint?

Use a dictionary comprehension with for part, size in cad_parts.items() and an if condition.

4

Create and print the toolpaths list

Create a list called toolpaths that contains strings in the format 'Toolpath for {part}' for each part in filtered_parts. Then print the toolpaths list.

CNC Programming

cad_parts = {'Gear': 50, 'Bracket': 30, 'Shaft': 70, 'Plate': 40}
size_threshold = 45
filtered_parts = {part: size for part, size in cad_parts.items() if size > size_threshold}
# Create toolpaths list and print it
# Your code here

Need a hint?

Use a list comprehension with f'Toolpath for {part}' and print the list.