ANALYSIS OF FAN COOLING SPEED, PRINTING SPEED AND LAYER HEIGHT ON PRODUCT GEOMETRY ACCURACY IN 3D PRINTING

Additive manufacturing is a technology that works by making a product from scratch, layer by layer until it becomes a complete product. An example of additive manufacturing is a 3D printer machine. The process sequence on a 3D Printer machine is the initial stage of creating design drawings in computer-aided design (CAD). Next, materialize the design image into a 3D printing machine. To get the best performance on a 3D printing machine, several parameters are set such as setting the product location during the printing process, setting parameters such as bed temperature and nozzle temperature. Polylactic Acid (PLA) is a filament that is widely used because it is easily decomposed so it is more environmentally friendly, because PLA is made from natural materials such as starch which is used for polymerization. The aim of this research is to determine the effect of variations in fan cooling speed, printing speed and layer height on the accuracy of product geometry in 3D printing using PLA material as well as parameter selection to obtain the most optimal results. The results of this research contained 2 significant factors, namely cooling fan speed and layer height and 1 factor that was not significant, namely printing speed. The percentage contribution of fan cooling speed is 39.52%, printing speed 2.99%, and layer height 11.98%. The optimal variables in this research are level 2 fan cooling speed, namely 100%, level 2 printing speed, namely 70 mm/s, and level 1 layer height, namely 0.1 mm.