Research Article

Using fault detection and classification techniques for machine breakdown reduction of the HGA process caused by the slider loss defect

¹ School of Mechanical Engineering, Suranaree University of Technology, Nakhon Ratchasima Province, Thailand
² Western Digital (Thailand) Co.Ltd, Bang Pa-in Industrial Estate, Ayutthaya Province, Thailand

^* e-mail: jiraphon@sut.ac.th

Received: 30 March 2022
Accepted: 18 July 2022

Abstract

Fault Detection and Classification (FDC) based on Machine Learning (ML) approach was used to detect and classify mount head fault in the slider attachment process which causes the machine alarm 71 to occur which leads to 2% of machine downtime. This paper has focused on the use of classified pixel surface of mount head with fault difference conditions including Healthy, Fault I, Fault II, and Fault III to detect and diagnose mount head before a vacuum leak. The Artificial Neural Network (ANN) algorithm was a proposed classification model and has to be evaluated before using in the real processes. Three features of mount head surface pixel, i.e., inner, outer, and overall areas were investigated and used as model training data set. The experiment result indicates that the classification using the ANN model with three features performed with an accuracy of 94.3%. According to the result, it was found that the reliability of the production processes of FDC technique has increased as a result of the reduction of machine downtime by 1.886%.