Additive Manufacturing (3D Printing) technology by means of which parts with a variety of thermoplastics (rigid, translucent or elastomer plastics) can be manufactured. It is an additive manufacturing system where a computer-controlled extrusion head extrudes a thread of plastic material. In industrial machines, this process is produced in a chamber with controlled temperature and environment. In the most economical 3D printers, on the opposite, this control cannot be carried out in such an exhaustive way.