3D printing has revolutionized industrial manufacturing and prototype construction. This technology produces objects layer by layer from a digital model. Consisting of the main components: In addition to a frame, print head, printing bed, control unit, shafts, toothed belts and motors, a typical 3D printer design generally also requires a number of accessories. But how exactly does an industrial 3D printer work? This article highlights the structure and function of the most important components and briefly names some areas of application.