Defect Reduction in Back Emf Test Process A Case Study of Electronics Industry

  • กรวิกา ไพศาลเจริญ
Keywords: Waste Reduction Process, Process Improvement, Failure Analysis, Design of Experimental, Rotor, Coil


The objective of this study is to reduce the amount of waste in the Back emf. testing process of Hard disk model RV. Which is the highest volume waste in the hard disk production process in this factory case study by applying the fishbone chart to study the relationship between cause and effect which causes waste Then use the failure analysis and the effect to determine the cause of high severity then to experimental design, factorial design methods, and studying the level of factors affecting waste occurrence in the process of testing electrical resistance

From the study, it is found that the factors that have an effect on the electrical resistance test process are Number of turns of copper winding, Copper wire size and the voltage value used to create a permanent magnet for the rotor manufacturing process. When experimenting to find the suitable level for experimenting with the production by focusing on the improvement of processes based on from the things in the production process current It is found that waste in this process can be reduced from 8.9% to 5%, equivalent to 1.3 million pieces per month. When choosing the right voltage range to create a permanent magnet