Methods of measuring friction between a slider and ramp, and related systems
US10989649B2 · kind B2 · utility
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16References
24Claims
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Key dates
| Filing date | Dec 13, 2017 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Dec 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.