Structure of a CNC Program

Program Number (O-word)

Naming Conventions

Program Comments and Headers

Blocks of Code (Lines)

Sequence Numbering

Block Structure and Order

Word Address Format

Fixed Block Format

Tab Sequential Format

Program Start Character (%)

Program End Codes (M02, M30)

Safe Start Conditions

Program Initialization

Using Parentheses for Comments

Best Practices for Documentation

Operation Descriptions

Tool and Setup Information

Syntax Checking

Logic Verification

Safety Considerations