Improvement of track zero to increase read/write area in hard disk drive assembly process

Abstract: An improper machine setting in a hard disk drive assembly process could reduce the read/write area of hard disk drives. This paper presents the methodology to increase the read/write area of hard disk drives by finding an optimal machine setting that minimizes the track zero. The Six Sigma improvement approach was applied. The design of experiment technique helped indicate the optimal levels of significant factors, which were the number of screw turn, the rotating pin height, and the cylinder force, that yield the minimum track zero. The results showed that the mean of track zero was decreased from 16,185 to 15,120 tracks and the standard deviation was decreased from 1,116 to 633 tracks resulting in the increase of the process capability index (Ppk) of the track zero performance from 0.54 to 1.52.

How to cite this paper

 Ruthaiputpong, P & Rojanarowan, N. (2013). Improvement of track zero to increase read/write area in hard disk drive assembly process.Uncertain Supply Chain Management, 1(3), 165-176.

Refrences

Antony, J., Kumar, M., & Tiwari, M. (2005). An application of Six Sigma methodology to reduce the engine overheating problem in an automotive company. Journal of Engineering Manufacture, 219, 633-646.

Does, R., Heuvel, E., & Mast, J. (2002). Comparing nonmanufacturing with traditional application of Six Sigma. Journal of Quality Engineering, 15, 177-182.

Jiguang, W., Nannan, Z., & Yifeng Z. (2012). High performance and high capacity hybrid shingled-recording disk system. IEEE International Conference on Cluster Computing. Beijing, Chaina, Sep 24-28.

Kim, K.H., Lee, Y., & Yang, H. (2009). Ramp tolerance analysis considering geometric errors. IEEE Transactions on Magnetics, 45, 2284-2287.

Klefsj?, B., Wiklund, H., & Edgeman, R.L. (2001). Six Sigma seen as a methodology for total Management. Measuring Business, 5, 31-35.

Kotz, S., & Lovelace, C.R. (1998). Process Capability Indices in Theory and Practice, Arnold, New York.

Kumar, U., Nowicki, D., & Verma D. (2008). On the optimal selection of process alternatives in a Six Sigma implementation. International Journal of Production Economics, 111, 456-467.

Lee, H.S., Kim, Y.H., & Hwang T.Y. (2005). VCM design to improve dynamic performance of an actuator in a disk drive. IEEE Transactions on Magnetics, 774-778.

Montgomery, D. C. (2006). Design and analysis of experiment, IV Edition. NY:John-Wiley & Sons, New York.

Pyzdek, T. (2003). The Six Sigma handbook revised and expanded. McGraw-Hill.

Raisinghani, M.S., Ette, H., & Pierce R. (2005). Six Sigma: concepts, tools, and applications. Industrial Management & Data System, 105, 491-505.

Shen, H., & Wan, H. (2009). Controlled sequential factorial design for simulation factor screening. European Journal of Operational Research, 198, 511-519.

Suk, M., & Albrecht, T.R. (2002). The evolution of load/unload technology. Microsystem Technologies, 8, 10-16.

Takaishi, K., Uematsu, Y., & Yamada, T. (2003). Hard disk drive servo technology for media-level servo track writing. IEEE Transactions on Magnetics, 39, 851-856.

Wong, W., Feng, L., & Guo, G. (2003). Implementation of a Servo Positioning System on Spin Stand. The 29th Annual Conference of the IEEE Industrial Electronics Society. Roanoke, United states, Nov 2-6.