Three dimensional printer

A truss-type 3D printer, comprising

• two standard sections of column extension (1),
• two standard sections of reinforcement (2),
• a standard section of the main beam (3),
• two standard sections of the X-axis (4),
• two hoisting elevator platforms (9),
• gantry crane assemblies (13), and cantilever crane assemblies;
• wherein the hoisting elevator platforms (9) are slidably installed on the corresponding standard sections of column extension (1);
• both hoisting elevator platforms (9) are fixedly equipped with transmission installation plates (15), and both standard sections of column extension (1) are fixedly equipped with linear guide rails (16);
• wherein the transmission installation plates (15) are slidably installed on the corresponding linear guide rails (16);
• the standard sections of the X-axis (4) are fixedly installed on the corresponding transmission installation plates (15), and the standard sections of reinforcement (2) are fixedly installed between the two standard sections of the X-axis (4);
• the standard section of the main beam (3) is fixedly installed between the two standard sections of the X-axis (4);
• the top of both standard sections of column extension (1) is fixedly equipped with lifting standard sections (14), and the cantilever crane assemblies are positioned on the lifting standard sections (14);
• the same gantry frame (12) is fixedly installed on both lifting standard sections (14), and the gantry crane assemblies (13) are positioned on the gantry frame (12), the standard sections of reinforcement (2) are slidably equipped with roller mounting brackets (17), and servo motors (19) are fixedly installed on the roller mounting brackets (17), the output shaft of the servo motors (19) is fixedly connected to a rotating print head (18).