Torlerencing analysis of head stack assembly using direct linearization method

Abstract

The objective of this paper is to study Head Stack Assembly tolerance analysis of Hard Disk Drive using the Direct Linearization Method (DLM) to analyze for tolerance assembly, Worst Case (WC), Root Sum Square (RSS) and percent contribution. The result show the maximum worst case is ±0.0106 mm on x axis and ±0.0491 mm on y axis. The maximum root sum square respect to x is ±0.0089 mm and y is ±0.0239 mm. The parallelism parameter k is the most effect to x axis about 82.92% and 97.83% for percent contribution of root sum square. In y axis, the parameter j is the most influences about 32.00%, and its root sum square is about 43.21%. The difference of average sensitivity between the experimental and the calculation is 0.17473 μm.