Video Overview The G2 G3 R value is one of the most misunderstood concepts in manual arc programming — and this demonstration makes it visual. Both R+ and R− share the same two endpoints and the same radius. The sign is the only difference, and it determines which of two possible arcs the machine cuts.…

Video Overview In this CNC Course lesson, we cut a precise 8mm circular magnet pocket using a ¼-inch end mill. This method is perfect when your tool is smaller than the final hole diameter. By combining incremental positioning (G91) with circular interpolation, you can create clean, accurate pockets for magnets, inlays, jigs, and fixtures. This…

🎥 Video 📝 Overview CNC Course (10) picks up right where Part 1 left off — with the answer to the quiz question posed at the end of the previous lesson — then goes deeper into the R (radius) method for programming arcs with G2 and G3. While Part 1 focused on the I and…

🎥 Video 📝 Overview This lesson takes CNC programming to the next level by introducing circular motion. Up to this point in the series, every toolpath has used straight-line moves — G0 rapid traverses and G1 linear feeds. G2 and G3 change that. These two commands tell the CNC controller to move the tool along…

🎥 Video 📝 Overview This lesson marks a milestone in the CNC Course series: the first real cutting pass. After learning G‑code basics, coordinate modes, spindle control, and Z‑zeroing, this is where everything comes together. The video shows the 3018‑style CNC making its first actual cut, demonstrating tool engagement, chip formation, and safe cutting behavior.…

🎥 Video 📝 Overview This lesson shows how to get a perfect, repeatable Z‑zero using a CNC touch puck (also called a Z‑probe). Beginners often struggle with setting Z‑height accurately, and even a small error can ruin a cut. This video demonstrates the correct workflow inside Candle (GRBL Control), explains how the probe cycle works,…