Research On Key Technology For Rapid Development Of Precise Plastic Product

In the Rapid Prototyping System, as Selected Laser Sinter (SLS), the most important part is the Galvanometric Laser Scanning System ,which always adopts the foreign 3D Galvanometric Laser Scanning system with Dynamic Focusing. But the price of those are above ten thousand dollars, so the cost of Rapid Prototyping equipment can not be cut down ,which is the primary reason that prevents domestic Rapid Prototyping Technique developing. The price of Galvanometer with F-Theta Lens Focusing(For short:2D Galvanometric Scanning System) is a few lower than that of 3D Galvanometric Scanning system with Dynamic Focusing, just the scanning precision of 2D Galvanometric Scanning System is lower than that of 3D Galvanometric Scanning System in the small scanning area(the area less than 300mm×300mm). If in the small area adopting 2D Galvanometric Scanning System and improving the scanning precision, the cost of Rapid Prototyping equipment will be cut down enormously. The theory of the 2D Galvanometric Scanning System is carried out first, and the designing scheme is brought forward. The appropriate control card is selected for the Galvanometer and the control scheme is brought forward. Scanning software and device driver software are researched and realized. The reason of image distortion is analyzed to study the correcting arithmetic and the correcting software is realized. At last , plenty of scanning tests are carried out .The optimal scanning precision is less than 0.04mm.