Most of us identify manufacturing processes by the equipment used. But manufacturing is also identified in a broader sense, by the way, the manufacturing is being accomplished. A single way a product is produced can be done by a variety of machines and tools. This article will describe three types, or ways, of manufacturing a product; additive, subtractive, and forming. Think of an artist painting a bear on a canvas. What is the process being used to make the picture of the bear? Paint is being added to the canvas to make the form of the bear. Actually, a variety of colors of paint are being added on top of each other to give the illusion of the different parts and features of the bear. So painting is an “additive” process of creating art. 3D printing is an additive process of manufacturing. That is why it is referred to as additive manufacturing. Material is built up layer by layer until the complete part is made. Some additive processes use a liquid material, others use material in a powder form. A variety of materials, both plastic, and metal are available to provide the unique attributes needed to satisfy the engineering requirements of the part. Advantages of ad...