3D printer, also known as 3D printer, is a kind of cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file. Print layers of adhesive material to create three-dimensional objects. 3D printers are currently used to manufacture products. The technique of constructing objects in a layer-by-layer manner. The principle of the 3D printer is to put data and raw materials into the 3D printer, and the machine will build the product layer by layer according to the program.