From Operator to Programmer

The Only G-Code Book Written the Way a Shop-Floor Instructor Would Teach It

Most CNC beginners hit the same wall. The machine manual is 400 pages of dense technical language written for engineers, not operators. The online tutorials skip the fundamentals and jump straight into code that makes no sense without context. The experienced programmer at the next machine is too busy to explain it from the beginning.

This book tears that wall down.

G-Code Unlocked gives you a complete, plain-language foundation for CNC programming. Every concept is explained clearly before it is applied. Every program is annotated line by line so you understand not just what the code says but why it is written that way. Every chapter builds directly on the one before it, taking you from zero programming experience to writing complete milling and turning programs that run correctly on real machines.

• Read any standard G-Code program and understand exactly what every line does
• Write complete CNC milling programs from scratch including facing, pocketing, drilling, and contouring operations
• Write complete CNC lathe programs including facing, turning, grooving, and threading operations
• Use G and M codes correctly and confidently on FANUC, Haas, and Siemens controls
• Set up work offsets, tool length offsets, and cutter radius compensation accurately
• Program every common hole-making operation using canned cycles including G81, G83, G84, G85, and G86
• Troubleshoot FANUC and Haas alarm codes and fix programming errors before they cause scrap or damage
• Write cleaner, faster programs using subprograms, loops, and structured formatting
• Calculate spindle speeds and feed rates from surface footage and chip load data
• Make the practical transition from CNC operator to CNC programmer with a clear, proven roadmap