Thermal analysis of disk-spindle assembly on RRO in computer hard disk drives

This paper presents thermal analysis of spindle disk assembly used in computer hard disk with new design approach of spindle to minimize the repeatable run-out (RRO) of track following position error signal (PES) in high track per inch (TPI) disk drives. Analysis has been taken on different operational temperatures (25°C – 80°C). By varying the notch angle (0° – 45°) in spindle, it has been found that RRO can be minimized significantly. FEA simulation results have been presented to verify the findings.