Which of the following is NOT a common additive manufacturing method?

CNC Machining is not a common additive manufacturing method because it is a subtractive manufacturing process. In subtractive manufacturing, material is removed from a solid block to create the desired part, typically through cutting, grinding, or milling. This process involves shaping material by eliminating excess, whereas additive manufacturing builds objects layer by layer, adding material to create the final shape.

On the other hand, Fused Filament Fabrication, Selective Laser Sintering, and Binder Jetting are all recognized additive manufacturing techniques. Fused Filament Fabrication involves extruding melted material through a nozzle to create objects layer by layer. Selective Laser Sintering uses a laser to fuse powdered materials together, while Binder Jetting combines layers of powder with adhesive to create solid structures. These methods exemplify the principles of additive manufacturing, focusing on adding material rather than removing it.