Arm + Fpga-based Laser Marking Machine Controller Design

Laser marking is a kind of technique of marking permanent sign on the surface of the object by using laser bean with high energy density. Compared with traditional press methods, laser marking has many merits such as high speed, non-pollution, high quality, stable performance, non-contact object's surface and so on. Laser marking is a most advanced technology and becomes an effective method for industrial product marking at present. The traditional laser marking controller based on ISA bus, PCI bus or USB bus has increased the cost and volume of the laser marking machine. A embedded system plan of laser marking based on the ARM+FPGA architecture is proposed in this article. The main research works are listed as follows:At first, the constitution of laser marking system, the development actualities of laser marking technology, and the principle of laser marking are introduced. In accordance with the functional requirements and performance indicators of the laser marking control system, the general design of ARM+FPGA is given in this article, and the features and advantages of ARM and FPGA are discussed briefly. Main function of the ARM processor is capable of inputting, transforming, setting marking parameters, and controlling the marking; The FPGA processor' functions are receiving, storing, transforming the marking data and generating signals to control the marking equipment. Then, the hardware circuit design of laser marking controller is discussed in detail, including ARM control unit, FPGA control unit, D/A module and so on. For the sake of that the controller can work reliably and stably for a long time, many anti-jamming measures such as isolation technique have been taken. The program of every module in FPGA has been simulated and testified through the software Quartus II, and every function of the controller is debugged finally.The embedded laser marking controller designed in this paper plays the respective advantages of ARM and APGA. The laser marking controller has been tested in the practical laser marking system, and the result proves that the design realizes the anticipative function and achieves satisfactory performance.