Abstract
The laser marking machine is a new marking technique that is developed after the laser welding, laser heat treatment, laser cutting, drilling and other applications of laser technology. It is no touching, no polluting and no wearing. Recently, the hardware circuit board must be plugged in the ISA bus or PCI bus of computer main board in the laser marking system.So the system is large, heavy and inconvenient in debugging or use and reduces the marking system stability. So a new embedded Laser Marking controller that is independent of ISA or PCI bus was designed in this paper.
Firstly, classified laser marking system, the general composition and the laser marking situation at the domestic and foreign presently were introduced in this paper. After having analyzed several kinds of common computer peripheral device and connection characteristics, the design concept of using USB2.0 was proposed to the Laser marking controllers. The paper decided to use the Cypress Corporation's EZ-USB FX2 to establish the superior machine and the DSP communications platform after presenting the USB2.0 communication protocol , and then designed FX2 and the DSP general connection，finally proposed the related firmware program frame.
The system will apply TMS320C6211 as the motion control board control chips, which runs at the full speed performance up to 1333 MIPS and extend the maximum storage of 512 MB. It has very good performance of data transmission, computing and image storage capabilities. The paper focused on achieving the DSP minimum system and the expansion of memory chips. Finally ADI Corporation 16 serial bit D/A transformation chip DA5061 was used to realize with the DSP connection, and then the analogue output voltage could accurately control stepper motor work.
Key words： Laser Marking; Controller; USB2.0; DSP; Serial D/A Transformation
