G-Code Programming for CNC Foundations

Learn the basics of G-code programming. Learn how to cut real-world objects on a CNC machine using G-code routines.

Introduction

• Welcome
• How to use the exercise files

1. CNC Concepts

• Understand work coordinate systems
• Absolute and incremental commands: G90 and G91
• Understand tool offsets
• Modal functions
• Safety block
• Safety checks
• G-code editors and simulators
• Programming resources

2. G-Codes

• G00: Rapid moves
• G01: Feed moves
• G02 and G03: Circular interpolation
• G04: Dwell
• G17, G18, and G19: Plane selection
• G20 and G21: Unit system selection
• G28: Return to machine zero position
• G53: Machine coordinate system selection
• G41, G42, and G40: Cutter compensation
• G81, G82, and G80: Drilling canned cycle
• G83: Peck drilling cycle
• G84: Tapping

3. M-Codes

• M00: Program stop
• M01: Optional stop
• M03, M04, and M05: Spindle on and off
• M06: Tool change
• M08: Coolant

4. Sample Programs

• Write a sample program
• Review the program code

Conclusion

• Next steps