CNC machining from first principles — coordinate systems, G-code, CAD/CAM with FreeCAD, and open-source machine control. Real cuts, real numbers, no prior knowledge assumed.https://cnc.bradpenney.io/ Brad Penneyen Thu, 09 Jul 2026 11:34:50 -0000 Thu, 09 Jul 2026 11:34:50 -0000 1440 MkDocs RSS plugin - v1.19.0 https://cnc.bradpenney.io/images/exploring_cnc.png https://cnc.bradpenney.io/ CNC machining from first principles — coordinate systems, G-code, CAD/CAM with FreeCAD, and open-source machine control. Real cuts, real numbers, no prior knowledge assumed. https://cnc.bradpenney.io/ Thu, 09 Jul 2026 11:24:02 -0300 Exploring CNChttps://cnc.bradpenney.io/ Every move a CNC router makes is just three numbers: X, Y, Z. Learn how machine zero, work zero, and G54 work together — and why getting zero wrong ruins a cut. https://cnc.bradpenney.io/essential/axes_and_coordinate_systems/ Thu, 09 Jul 2026 11:24:02 -0300 Exploring CNChttps://cnc.bradpenney.io/essential/axes_and_coordinate_systems/ A generated G-code file looks like a wall of numbers. Learn the handful of G and M words behind nearly every line, and why 'modal' state changes what comes next. https://cnc.bradpenney.io/essential/reading_gcode_basics/ Thu, 09 Jul 2026 11:24:02 -0300 Exploring CNChttps://cnc.bradpenney.io/essential/reading_gcode_basics/