Welcome to the CNC Macro Programming Bible.

Macro programming transforms CNC machines from simple motion systems into programmable automation platforms.

This guide covers variables, logic, loops, calculations, automation, and advanced machining strategies.

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SECTION 1 — WHAT IS MACRO PROGRAMMING
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Macro programming allows CNC programs to make decisions.

Instead of fixed code, programs can use:

Variables

Calculations

Conditions

Loops

Automation

Benefits

Shorter programs

Reusable code

Reduced programming time

Advanced automation

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SECTION 2 — CNC VARIABLES
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Common Variables

1

2

3

Local Variables

100 – #199

Common Variables

500 – #999

System Variables

Controller dependent

Applications

Coordinates

Tool compensation

Part dimensions

Automation logic

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SECTION 3 — IF STATEMENTS
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Purpose

Decision making.

Example

IF[#100 GT 10] GOTO100

Meaning

If variable #100 is greater than 10, jump to sequence 100.

Applications

Tool checks

Safety logic

Adaptive machining

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SECTION 4 — WHILE LOOPS
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Purpose

Repeat operations automatically.

Example

WHILE[#100 LT 5]DO1

Loop body

END1

Applications

Pattern machining

Incremental drilling

Batch operations

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SECTION 5 — CALCULATIONS
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Operations

Addition

Subtraction

Multiplication

Division

Applications

Bolt circles

Pattern generation

Automatic positioning

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SECTION 6 — AUTOMATED BOLT CIRCLE MACRO
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Generate hole locations automatically.

Benefits

Reduced programming

Higher accuracy

Reusable logic

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SECTION 7 — AUTOMATED POCKET MACRO
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Generate pockets from variable dimensions.

Benefits

Parametric machining

Flexible programming

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SECTION 8 — PROBING MACROS
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Applications

Part alignment

Tool measurement

Automatic setup

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SECTION 9 — MACRO TROUBLESHOOTING
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Variable errors

Loop errors

Logic errors

Infinite loops

System variable mistakes

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SECTION 10 — ADVANCED CNC AUTOMATION
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Adaptive drilling

Automatic pattern generation

Tool life tracking

Part family programming

Reusable machining templates

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FINAL PRINCIPLE

Macro programming is where CNC programming becomes automation.

Understanding variables, conditions, loops, and calculations allows programmers to create intelligent machining systems that reduce code, improve efficiency, and increase flexibility.