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Accurate Runout Measurement for HDD Spinning Motors and Disks
Journal of Advanced Mechanical Design, Systems, and Manufacturing
As hard disk drive (HDD) areal density increases, its track width becomes smaller and smaller and so is non-repeatable runout. HDD industry needs more accurate and better resolution runout measurements of spinning spindle motors and media platters in both axial and radial directions. This paper introduces a new system how to precisely measure the runout of HDD spinning disks and motors through synchronously acquiring the rotor position signal and the displacements in axial or radial directions.doi:10.1299/jamdsm.4.324 fatcat:qntctgahfnhajncj3lhpkrz4rq