Non-invasive take-off/touch-down velocity measurements

Klaassen, K.B.; Peppen, J.C.L. van; Eaton, R.

doi:10.1109/20.334023

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…To characterize this effect, we actuated the heater on the head to drive it close enough to the disk that the head started to vibrate. Vibration modes causing frequency modulation (FM) of the read back signal were observed through frequency demodulation of read signal [7]. Finally, using images reconstructed from the read back signal, we demonstrated the effect of the head vibration on write timing.…”

Section: Introductionmentioning

confidence: 98%

Characterization of Mechanically Induced Timing Jitter in Synchronous Writing of Bit Patterned Media

Tang

Che

2008

IEEE Trans. Magn.

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Potential sources of timing errors in writing bit-patterned media are experimentally characterized. This paper describes a time-domain analysis of jitter in a disk drive that is identified as the effect of spindle speed variation. The jitter during head-disk interaction is characterized by a frequency modulation analysis. The impact of head vibration on write timing is also demonstrated using images reconstructed from read signal.

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Section: Introductionmentioning

confidence: 98%

Characterization of Mechanically Induced Timing Jitter in Synchronous Writing of Bit Patterned Media

Tang

Che

2008

IEEE Trans. Magn.

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Mechanically-induced readback errors in contact recording

1994

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True contact recording, where the slider interacts substantially with the disk, produces read errors in the form of shifted bits. The errors arise from velocity jitter at suspension resonance frequencies, excited by the slideddisk contact, and degrade readback performance long before the onset of tribological wear. Performance degradation is particularly apparent in high altitudehow pressure situations, which increase the amount of slider/disk interaction. Channel optimization should be revisited for low flying components.

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