For the WATIFY seminar 20 april 2018 I presented this first builfd of a Digital Twin for a 3D Printer. Advanced manufacturing is the use of innovative technology to improve products or processes. An important innovative technology is additive manufacturing or 3D printing. In this webinar some practical examples are given how digitization is used to improve 3D printing: 1) e-supply chain tools for additive manufacturing, 2) automated root cause analyses of printing defects, 3) use of deep learning towards Zero Defects.