Blender CAM Tutorial | Import STL & Generate G-Code for CNC Mesh Milling
Learn how to generate G-code from STL mesh models using Blender CAM — a free, open-source CAM solution that works perfectly with mesh-based parts.
This step-by-step tutorial shows you how to import an STL, set up CAM operations, configure feed rates and tools, and export ready-to-use G-code for your CNC machine.
You’ll discover:
Why Blender CAM is a great option for mesh milling (especially when FreeCAD struggles with STL models)
How to install and configure the Blender CAM Add-on
How to import, resize, and position STL files
How to create CAM operations and define toolpaths, feedrates, and strategies
How to export clean G-code using the proper post processor
This tutorial is perfect for CNC beginners, hobbyists, and makers looking for free software to turn 3D models into CNC toolpaths — without expensive commercial tools.
Continue Learning CNC CAM Workflows:
– Full step-by-step guide in FreeCAD: • FreeCAD 1.0 CAM Tutorial | CNC Machining &...
– Master toolpaths in FreeCAD: • FreeCAD CAM - Complete Lessons (CNC G-code...
– Simple CNC projects using FreeCAD & Blender: • Beginner CNC Projects – Easy DIY CNC Tutor...
– More Blender-based toolpath videos: • Blender CAM G-Code Tutorials – Free CNC Mi...
Why Use Blender CAM?
Blender CAM (FabEX CNC) is ideal when your project uses STL meshes or sculpted models — scenarios where FreeCAD’s CAM Workbench may not generate reliable paths.
By combining both tools, you get the best of both worlds:
FreeCAD for parametric parts and precision machining
Blender CAM for organic or mesh-based designs
00:00 Intro: Generate G-code from STL files using Blender CAM (free open-source CAM)
01:29 Blender interface overview and unit setup for CNC projects
02:08 How to install Blender CAM (FabEX CNC) add-on
02:42 Importing an STL file for CNC milling
02:55 Resizing and scaling STL models for correct CNC dimensions
04:43 Getting started with Blender CAM: main settings overview
05:12 Creating a new CAM operation (step-by-step)
05:49 Setting material size, position, and origin for CNC stock
07:38 Selecting machining strategy for mesh milling
08:51 CAM operation settings with explanations (depths, paths)
11:06 Configuring feedrates and spindle speeds
11:59 Adding tools (cutters) for G-code generation
12:33 Using G-code options and output trailers
12:57 Machine settings: post processor, units, feedrate limits
16:22 Generating the toolpath (calculate path)
17:44 Exporting and saving the final G-code file
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