Bernardus Sentot Wijanarka, Achmad Arifin, Aris Eko Wibowo
The objectives of this study are: (1) to analyze the use of variations in machining parameters in the laser cutting process, especially cutting speed and power; (2) to identify the surface roughness of the cutting results of CNC laser cutting machines, and (3) to analyze the level of dimensional precision of the cutting results in the CNC laser cutting process. This study uses an experimental method with Simplex Centroid Design and multiresponse plot optimization techniques to optimize the setting power level (30 A, 40 A, and 50 A) and cutting speed (5, 8, and 11 mm/sec) of the Zaiku CNC LS 3020 laser CNC machine with acrylic materials with a thickness of 2 mm, 3 mm, and 4 mm. Based on the above data, there are three variations in cutting speed, three variations in electric current, and three variations in specimen thickness, so the experimental design produces 27 variations of treatment. The research instruments used were digital calipers and digital microscopes. Data analysis uses comparative descriptive analysis. The results of the study show: (1) the parameters for the cutting process with a cutting speed of 5 to 11 m/s and the current parameter between 30 to 50 amperes; (2) The surface of the not ongoing is still classified as rough with a path of 0.2 mm; (3) the dimensions of the cutting result are greater than the dimensions of the specimen image which should be at the price deviation between 0.4 to 0.7 mm, and there is no effect of cutting speed and current on the accuracy of the cutting result if the size tolerance used is 0.05 mm or 0.1 mm. © 2025 Author(s).
Department of Mechanical Engineering, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
