Circular Interpolation Explained: G02 & G03 | Beginner CNC Lesson 16

Learn how CNC mills follow curved paths with G02 and G03. In Lesson 16 of Know-How Compass’s beginner CNC mill training series, we break down circular interpolation with clear diagrams and practical examples. In this lesson, you’ll learn: • Clockwise G02 versus counterclockwise G03 movement • The G17 XY plane and viewing direction • Arc starting points, endpoints, centers, and radii • How to calculate incremental I and J center offsets • Short arcs versus long arcs • R-radius programming considerations • How cutter radius affects circular toolpaths • Common arc geometry mistakes Follow along with review questions and a drawing exercise to practice what you’ve learned. Always verify programming conventions against your machine’s documentation before applying an example. Subscribe to Know-How Compass for more beginner CNC training. Next up: combining straight lines and arcs to plan a simple contour. Know-How Compass Practical skills. Clear lessons. #CNCMachining #CNCProgramming #CircularInterpolation #G02 #G03 #GCode #CNCForBeginners #CNCMilling #Machinist #KnowHowCompass