CNC program documentation in CNC Programming - Mini Project: Build & Apply

CNC Program Documentation

📖 Scenario: You work in a manufacturing shop where CNC machines are programmed to cut metal parts. Each CNC program needs clear documentation so operators understand what the program does and how to run it safely.

🎯 Goal: Create a simple CNC program with clear documentation comments that explain the tool, material, and cutting steps.

📋 What You'll Learn

Create a CNC program variable with the program name and description

Add a variable for the tool number used in the program

Write the main CNC program code with comments explaining each step

Print the full CNC program with documentation comments

💡 Why This Matters

🌍 Real World

CNC operators and programmers use documented CNC programs to safely and accurately run machining operations.

💼 Career

Clear CNC program documentation helps reduce errors, improves communication, and ensures consistent manufacturing quality.

1

Create CNC program header variables

Create a variable called program_name and set it to "P1001". Create another variable called program_description and set it to "Face milling aluminum block".

CNC Programming

# Create 'program_name' and 'program_description' variables
# Your code here

Need a hint?

Use simple string assignment to create the variables.

2

Add tool number variable

Add a variable called tool_number and set it to 5 to represent the milling cutter used.

CNC Programming

program_name = "P1001"
program_description = "Face milling aluminum block"
# Add 'tool_number' variable
# Your code here

Need a hint?

Use an integer variable for the tool number.

3

Write CNC program code with comments

Create a variable called cnc_code and assign a multiline string that contains the CNC program code. Include comments starting with ( ) to document the tool change, spindle start, and milling passes. Use the exact lines:
(Tool change to tool 5)
T5 M6
(Start spindle clockwise at 1200 RPM)
M3 S1200
(Face milling passes)
G1 X100 Y0 F300
G1 X0 Y0
M5
M30

CNC Programming

program_name = "P1001"
program_description = "Face milling aluminum block"
tool_number = 5
# Create 'cnc_code' variable with multiline string including comments
# Your code here

Need a hint?

Use triple quotes to create a multiline string with comments inside parentheses.

4

Print the full CNC program with documentation

Print the program_name, program_description, tool_number, and the cnc_code variables in a readable format. Use print() statements to show each piece of information on its own line.

CNC Programming

program_name = "P1001"
program_description = "Face milling aluminum block"
tool_number = 5
cnc_code = """(Tool change to tool 5)
T5 M6
(Start spindle clockwise at 1200 RPM)
M3 S1200
(Face milling passes)
G1 X100 Y0 F300
G1 X0 Y0
M5
M30"""
# Print all variables with labels
# Your code here

Need a hint?

Use print() with f-strings to show variable values clearly.