Where Do I Go From Here? - 3D Printing: Build your Own 3D Printer and Print your own 3D Objects - page 200

Figure 11.1 This CNC machine uses a milling bit and moves along three axes.
The first thing you'll notice is that it's larger than the Simple 3D printer. Most
CNC machines are larger, but some desktop versions (often called milling ma-
chines) are just as tiny as the smaller 3D printers.