Design of desktop DLP model 3D printer based on embedded Linux

ZHAO Jiong1, YU Xuehai1, YANG Tianhao1, ZHOU Gaoyang1, LING Hao1, XV Qiang2

(1.School of Mechanical Engineering, Tongji University, Shanghai 201804, China;
2.Shanghai Guanghua Technolony Co., Ltd., Shanghai 201803, China)

Abstract: Aiming at the problems of high cost, inconvenience and unpopularity of DLP 3D printers, research on the theory and implementation of DLP 3D printers were carried out. A desktop DLP 3D printer based on embedded Linux with lowpriced hardware and python language was proposed. This 3D printer system was constituted by a CortexA7 micro controller named Raspberry Pi, a software using GPL OpenCV, a stepper motor to control printing platform and a serial touch screen, providing the ability of offline printing. Models which were smaller than 120*120*160(mm) can be printed by this 3D printer whose size was 240*220*500(mm). A 0.025 mm height of each layer and a 1 080 P image resolution were confirmed by the test results. The results indicate that this 3D printer has the advantages of high printing precision, small size, low cost and offline printing.

Key words: 3D printing; desktop; DLP; Raspberry Pi; OpenCV; offline printing