G-Code Programming for CNC Foundations

Course details

G-Code is the code that controls CNC machining centers, CNC lathes, CNC routers, and most 3D printers. This course teaches the fundamentals of G-Code to the programmers, engineers, and designers that need to write, read, and edit it. It also takes you to the Haas factory floor to see how the code works on a real HAAS VF3 SS machining center. Instructor Gabriel Corbett reviews the most popular G-codes for movement, positioning, selection, drilling, and tapping, as well as M-codes for tool changes, spindle starting and stopping, and control of coolant. At the end of the course, Gabriel machines a complete part at the HAAS factory on a high-speed CNC machining center. The G-code routines used include advanced adaptive contouring routines for outside roughing, pocketing, drilling, tapping, and so much more.

Learning objectives
CNC concepts
G-code editor and simulator software
G-codes: G00-G84
M-codes: M00-M09
Writing a sample program in G-Code

Concepts

0. Introduction

01 - Welcome
02 - How to use the exercise files

1. CNC Concepts

03 - Understand work coordinate systems
04 - Absolute and incremental commands - G90 and G91
05 - Understand tool offsets
06 - Modal functions
07 - Safety block
08 - Safety checks
09 - G-code editors and simulators
10 - Programming resources

2. G-Codes

11 - G00 - Rapid moves
12 - G01 - Feed moves
13 - G02 and G03 - Circular interpolation
14 - G04 - Dwell
15 - G17, G18, and G19 - Plane selection
16 - G20 and G21 - Unit system selection
17 - G28 - Return to machine zero position
18 - G53 - Machine coordinate system selection
19 - G41, G42, and G40 - Cutter compensation
20 - G81, G82, and G80 - Drilling canned cycle
21 - G83 - Peck drilling cycle
22 - G84 - Tapping

3. M-Codes

23 - M00 - Program stop
24 - M01 - Optional stop
25 - M03, M04, and M05 - Spindle on and off
26 - M06 - Tool change
27 - M08 - Coolant

4. Sample Programs

28 - Write a sample program
29 - Review the program code

Conclusion

30 - Next steps