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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,…
🎥 Video 📝 Overview This lesson shows beginners how to write and run a simple manual G‑code program directly inside Candle (GRBL Control). Instead of relying on CAM‑generated toolpaths, you type the commands yourself and watch the CNC execute them line by line. This builds confidence, reinforces earlier lessons (G0, G1, G90, G91), and helps…
🎥 Video 📝 Overview This lesson tackles one of the most common beginner CNC frustrations: the spindle only runs at one speed no matter what S‑value you enter. Many new GRBL users assume their machine is broken, but the real issue is almost always a wiring or controller‑capability mismatch. The video demonstrates why GRBL machines…
🎥 Video 📝 Overview This lesson introduces G90 Absolute Positioning, the coordinate mode used in nearly all CAM‑generated CNC programs. In absolute mode, every movement command references a fixed zero point—usually the workpiece zero you set at the start of a job. This makes toolpaths predictable, repeatable, and easy to read. The video demonstrates how…
🎥 Video 📝 Overview This lesson explains G91 Incremental Mode, one of the two fundamental CNC coordinate modes. Incremental mode tells the CNC to interpret every movement relative to its current position, not from a fixed origin. Understanding G91 is essential for reading and writing G‑code, especially when troubleshooting or creating simple manual programs. The…