| With the rapid development of technology,3D printing technology has become one of the most potential rapid prototyping technologies. It is widely used in many fields, such as mold manufacturing, building model, art design and so on.3D printing has broad market prospects because of its advantages of low-cost, high-efficiency and user-friendliness.On the basis of fused deposition modeling, a 3D printing control system based on ARM is designed in this paper. First of all, based on the structure and working principle of 3D printer, the overall design scheme of the control system is presented in this paper. As the core microcontrollers of 3D printing control system, LPC1768 has many advantages on working frequency, processing performance and internal resources compared to traditional microcontroller, making it easier to design the hardware circuit. In this paper, the hardware circuit of 3D printing control system mainly includes stepper motor drive circuit, nozzle temperature control circuit, LCD circuit and serial interface communication circuit. As the control center of 3D printer, control system software is mainly composed of three parts. The first part is the trapezium speed control curve driving program. of stepper motor, which it implements the situation that the stepper motor can be accurately controlled without losing synchronism. The second part is heating and temperature control program which can heat nozzle stabilize the temperature of the nozzle for ABS extruding. The third part is the LCD driving program for displays temperature and status of printing in real time.. The fourth part is communications serial interface between PC and 3D printer, which can transfer printing data and monitor the status of printingFinally, the overall performance of 3D printer will be tested through printing physical model. From the result, the 3D printer control system based on ARM has stable performance, which can meet the design requirements of hardware and software. |
