Influences of Building Parameters on Over-cured Depth in Stereolithography System

In order to increase the building accuracy of microstructure in Z direction built with Stereolithography (SL) system, researches were carried to investigate the influences of factors on over-cured depth in SL process. The model of over-cured depth in SL process is established according to the characteristic of SL process, and experiments were conducted to prove the validity of the model with high-resolution SL system. It is found that main factors impacting over-cured depth are cured thickness of down-facing layer and the thickness of slice for 3D model of object. The smaller the cured thickness of down-facing layers and the larger the thickness of slice is, the smaller the over-cured depth is. It is also found that over-cured depth can be decreased through decreasing the ratio of laser power to scanning speed. The researches provide a base for increasing the building accuracy of microstructure in Z direction built with SL system.