CNC builds come in all shapes and sizes. There’s delta manipulators, experimental polar rigs, and all manner of cartesian builds, large and small. After completing their first CNC build, [jtaggard] took what they learned and applied it in the development of a new machine. It’s a desk-sized cartesian design, with a frame built from V-slot extrusion cut to size by circular saw. This is a great way to get quality extrusion for a custom build, and is readily available and easy to work with. The gantry rides on wheels, with the X and Y axes being belt driven, plus a screw drive for Z. A couple of NEMA 17s and a NEMA 23 provide motive power, and an Arduino Uno with stepper drivers is the brains of the operation. 1/4″ thick PLA plates are used to assemble everything, and while [jtaggard] intended to replace these with aluminium down the track, so far the plastic has proved plenty rigid enough for early tests of both machining and engraving wood. It’s a great entry-level CNC build, which has proved usable with both a 500W spindle and a 2.5W laser for engraving. Being modular in nature, it would be easy to add other tools, such as a pen plotter or vinyl cutting blade for further versati...