SendCutSend Education

Lesson 1.9

How to Understand CNC Machine Coordinates and G-Code

This series was filmed and edited by Keaton Bowlby

In chapter 1 lesson 9, we introduce G-code and how CNC machines understand and execute your designs.

We’ll break down how machines track position using machine home and work coordinate systems, and how offsets allow you to define where your part exists in space. From there, we’ll walk through the basics of G-code, including common commands for movement, spindle control, feed rates, and tool changes. You’ll also see how these commands come together to control every step of the machining process.

What you’ll learn in this episode:

  • The difference between machine home and work coordinate systems
  • How work offsets define part position in the machine
  • What G-code is and how it controls CNC machines
  • Common commands for movement, spindle speed, and tool changes
  • How CNC programs are structured and executed

More Episodes

History of CAD video lesson
Lesson 1.1

The History of CAD

SendCutSend Education Video Series: How to Master Dimple Design in Sheet Metal
Lesson 5.10

How to Master Dimple Design in Sheet Metal

SendCutSend Education video series: How to Create Assemblies in CAD with Joints
Lesson 2.2

How to Create Assemblies in CAD with Joints

SendCutSend Video series: How to Choose the Right CAD File for Manufacturing
Lesson 4.1

How to Choose the Right CAD File for Manufacturing

Get notified when new lessons drop

We're launching a new chapter every week. Put in your email and we'll let you know when they're available.