Learn
G-Code Online
Demystify CNC code. Stop guessing with random blog posts and YouTube clips. Learn G-code from scratch, master manual programming, M-codes, and canned cycles with interactive simulators, 24/7 AI support, and 1-on-1 expert mentorship.
100% free lessons. No credit card required.
Success Stories From Our Programmers
Jose R. (Texas)
After taking a college course a decade ago, he needed a refresher on G-code logic. Machining Tutor gave him a structured way to relearn manual programming that made total sense.
Daniel D. (North Carolina)
Daniel loved how easy our G-code lessons were to follow, helping him transition from a button pusher into someone who actually understands what the machine is reading.
Ryan J. (Oregon)
Ryan started with absolute zero experience. By learning G-code step by step, he gained the confidence to write lines of code and run physical parts on his desktop CNC.
Why Learning G-Code With Us Actually Works
Reading raw code can be intimidating. Here is how we make G-code intuitive, safe, and easy to master.
Code From Scratch
We strip away the confusion. Learn core G-code logic, modal commands, coordinate systems, and canned cycles line by line.
24/7 AI Code Debugger
Stuck on an alarm code or syntax error at midnight? Paste your G-code into our 24/7 AI assistant and get instant explanations and fixes.
Safe Virtual Verification
Test your manual programming logic on our interactive web simulators to verify tool movements before running them on a physical machine.
From Code Confusion to Total Mastery
STEP 1: MACHINE COORDINATES & AXES
Before writing code, you must understand how the machine thinks. We teach you X, Y, and Z coordinate systems, absolute vs incremental positioning, and work offsets.
STEP 2: WRITE G-CODE & M-CODES
Become the brain behind the machine. Learn standard preparatory functions (G00, G01, G02, G03), tool changes, spindle speeds, and coolant commands.
STEP 3: ADVANCED CYCLES & CAM INTEGRATION
Level up your programming. Master drilling canned cycles, subprograms, and transition smoothly into generating toolpaths with modern CAD/CAM software.
Complete Curriculum Featuring G-Code Mastery
Our program covers everything from basic machine logic to advanced multi-axis programming.
CNC Machine Fundamentals
- CNC Mill & Lathe architecture
- Coordinate systems for milling & turning
- Machine power & limitations
Shop Floor & Blueprint Skills
- Technical drawing & blueprint reading
- Haas NGC vs Classic controls
- Work offsets & tool offsets
G-Code & Programming Foundations
- Core G-code and M-code logic
- Linear and circular interpolation (G0-G3)
- Canned cycles (drilling, boring, tapping)
- Reading and editing raw code
Tooling & Materials
- Cutting tools & applications
- Speeds & feeds calculations
- Clamping systems & vise setup
CAD Modeling (SolidWorks)
- SolidWorks sketching & modeling
- Creating mill & lathe-ready parts
CAM Programming (Mastercam & Fusion)
- Mastercam & SolidCAM workflows
- Autodesk Fusion turning & milling
- Production-ready toolpaths
Interactive Practice: Learn by Doing
Mastering code requires hands-on practice. Use our suite of web simulators to test your shop floor logic and math right from your browser.
Part Zero & Edge Finder
Master the edge finder without crashing a $100k machine. Jog the axes to accurately find your G54 part zero.
▶ Play FreeManual Micrometer
Test your precision. Read the manual micrometer scale and determine if the machined part is within tolerance.
▶ Play FreeCoolant Concentration
Mix water and oil, then look through the virtual refractometer to hit the perfect Brix percentage.
▶ Play FreeTap & Pre-drill Quiz
Who Wants to be a Machinist? Test your shop-floor memory on thread pitches and tap drills to win.
▶ Play FreeSimple & Transparent Pricing
Flexible Monthly Plan
Cancel anytime • billed monthly
- Unlimited Courses Access (All Modules including G-Code Training)
- Interactive Simulators & Games
- 24/7 AI Machining Tutor (Instant Code Answers)
- Full CAD/CAM Training
- Career Suite: Resume Review & Job Search
- Certification of Completion
Annual Membership
Billed annually • Save over 50%
- EVERYTHING in the Monthly Plan
- Huge Savings: Get a full year of access for less than the price of 6 months
- Priority Technical Support: Direct priority access to our team for G-code and programming troubleshooting
- All Future Updates: Get every new module and upgraded AI tool we release
14-Day Money-Back Guarantee
We are so confident this training will change your career, we’ll take all the risk. Join today. Watch the lessons. Test the AI. If you don’t feel like you’ve learned more in 14 days than you would in a year of trade school, we will refund 100% of your money. No questions asked.
You Have Two Choices Today...
Don't stay stuck guessing what lines of G-code mean.
The Hard Way
Spend months trying to piece together G-code commands from confusing forum posts, risking costly machine crashes, and staying stuck as a low-level operator.
The Machining Tutor Way
Learn G-code logically from scratch with a proven curriculum, 24/7 AI code assistance, and safe simulators that build your programming confidence fast.