Optimization of Production Process Parameters of DLP Type 3D Printer Design for Product Roughness Value

Additive Manufacturing (AM) is a breakthrough in manufacturing technology based on a layer by the layer printing process through various raw material input techniques. Objects to be printed using a 3D model design by adding raw materials to a 3D printing machine are opposite to subtractive manufacturing types, such as in a CNC milling machine. The purpose of this study was to obtain optimal parameters on the DLP type 3D printing machine for product roughness values using methods that include literature, design, and experimental studies. The specimens tested were 30x15x4 mm in size, with ultraviolet resin material. The test results were analyzed based on the 2-level factorial experimental design type and the 3FI design model, which was processed using the Anova method. The analysis results show that the optimal parameter for the DLP type 3D printing machine for the product surface roughness is the layer height; 0.035 mm, exposure time; 19.542 s, and bottom exposure; 60.679 s with a roughness value of 0.469 μm.