Toolpath simulation and verification in CNC Programming - Mini Project: Build & Apply

Toolpath Simulation and Verification

📖 Scenario: You work in a small workshop that uses CNC machines. Before running a CNC program on the machine, you want to simulate the toolpath to check if it moves correctly and safely. This helps avoid mistakes that could damage the machine or the material.

🎯 Goal: Build a simple script that simulates a CNC toolpath by reading a list of coordinates, checks if the tool moves within safe limits, and prints the verified path.

📋 What You'll Learn

Create a list of toolpath points with exact coordinates

Add a safety limit variable for maximum allowed coordinate value

Use a loop to check each point against the safety limit

Print the verified toolpath points

💡 Why This Matters

🌍 Real World

Simulating and verifying CNC toolpaths helps prevent machine crashes and material waste by checking movements before actual machining.

💼 Career

CNC programmers and machinists use toolpath verification scripts to ensure safe and efficient machine operation.

1

Create the toolpath data

Create a list called toolpath with these exact coordinate tuples: (0, 0), (10, 5), (20, 15), (30, 25), (40, 35).

CNC Programming

# Create the toolpath list with exact points
# Your code here

Need a hint?

Use a Python list with tuples for each point.

2

Add safety limit configuration

Add a variable called safety_limit and set it to 50. This will be the maximum allowed coordinate value for both X and Y.

CNC Programming

toolpath = [(0, 0), (10, 5), (20, 15), (30, 25), (40, 35)]
# Set the safety limit to 50
# Your code here

Need a hint?

Just create a variable with the number 50.

3

Verify toolpath points against safety limit

Create a new list called verified_path. Use a for loop with variables x and y to iterate over toolpath. Add only points where both x and y are less than or equal to safety_limit to verified_path.

CNC Programming

toolpath = [(0, 0), (10, 5), (20, 15), (30, 25), (40, 35)]
safety_limit = 50
# Create verified_path list and add safe points
# Your code here

Need a hint?

Use a loop and an if condition to filter points.

4

Print the verified toolpath

Print the verified_path list to display the safe toolpath points.

CNC Programming

toolpath = [(0, 0), (10, 5), (20, 15), (30, 25), (40, 35)]
safety_limit = 50
verified_path = []
for x, y in toolpath:
    if x <= safety_limit and y <= safety_limit:
        verified_path.append((x, y))
# Print the verified_path list
# Your code here

Need a hint?

Use print(verified_path) to show the result.