Tolerance achievement strategies in CNC Programming - Mini Project: Build & Apply

Tolerance Achievement Strategies in CNC Programming

📖 Scenario: You are programming a CNC machine to manufacture metal parts. Each part must meet specific size tolerances to fit perfectly in an assembly. You want to automate the process of checking if the measured dimensions of parts meet the tolerance limits and decide the action to take.

🎯 Goal: Build a simple CNC program script that stores part measurements, sets tolerance limits, checks if each measurement is within tolerance, and outputs the result for each part.

📋 What You'll Learn

Create a dictionary called part_measurements with exact part IDs and their measured sizes.

Create a variable called tolerance_limit with the exact value 0.05 (millimeters).

Use a for loop with variables part_id and size to iterate over part_measurements.items().

Inside the loop, use an if statement to check if the size is within the tolerance limit compared to the nominal size 10.0 mm.

Print the part ID and whether it is 'Within Tolerance' or 'Out of Tolerance' exactly as shown.

💡 Why This Matters

🌍 Real World

Manufacturers use tolerance checks to ensure parts fit together correctly and machines run smoothly.

💼 Career

CNC programmers and quality inspectors automate tolerance verification to save time and reduce errors.

1

DATA SETUP: Create part measurements dictionary

Create a dictionary called part_measurements with these exact entries: 'P001': 10.02, 'P002': 9.96, 'P003': 10.07, 'P004': 9.95, 'P005': 10.00.

CNC Programming

# Create the dictionary part_measurements with exact part IDs and sizes
# Your code here

Need a hint?

Use curly braces to create a dictionary with the exact keys and values.

2

CONFIGURATION: Set the tolerance limit

Create a variable called tolerance_limit and set it to 0.05.

CNC Programming

part_measurements = {'P001': 10.02, 'P002': 9.96, 'P003': 10.07, 'P004': 9.95, 'P005': 10.00}
# Create the tolerance_limit variable and set it to 0.05
# Your code here

Need a hint?

Use a simple assignment to create the tolerance_limit variable.

3

CORE LOGIC: Check if parts are within tolerance

Use a for loop with variables part_id and size to iterate over part_measurements.items(). Inside the loop, use an if statement to check if the absolute difference between size and the nominal size 10.0 is less than or equal to tolerance_limit. If yes, set a variable status to 'Within Tolerance', else set it to 'Out of Tolerance'.

CNC Programming

part_measurements = {'P001': 10.02, 'P002': 9.96, 'P003': 10.07, 'P004': 9.95, 'P005': 10.00}
tolerance_limit = 0.05
# Use a for loop to check each part's size against tolerance
# Your code here

Need a hint?

Use abs() to get the absolute difference and compare it to tolerance_limit.

4

OUTPUT: Print the tolerance check results

Inside the for loop, print the part_id and status in this exact format: Part P001: Within Tolerance.

CNC Programming

part_measurements = {'P001': 10.02, 'P002': 9.96, 'P003': 10.07, 'P004': 9.95, 'P005': 10.00}
tolerance_limit = 0.05
for part_id, size in part_measurements.items():
    if abs(size - 10.0) <= tolerance_limit:
        status = 'Within Tolerance'
    else:
        status = 'Out of Tolerance'
    # Print the part ID and status in the format: Part P001: Within Tolerance
    # Your code here

Need a hint?

Use an f-string to format the print output exactly as shown.