An Angle Measurement of Hard Disk´s Head in the HSA Using Image Processing

Hard disk´s head (HDH) is one of the most important parts in a hard disk. Because the floating height between the HDH and the platter is very narrow, it is necessary to make sure that the HDH´s pitch angle and roll angles are from -0.05° to 0.05° on the Head Stack Assembly (HSA). The maximum error is 0.0226° for pitch angle and 0.0288° for roll angle according to our experimental results. This paper presents an image processing techniques for measuring the pitch and roll angle of the HDH.