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Effect of dual-stage actuator on positioning accuracy in 10 k rpm magnetic disk drives

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4 Author(s)
Koganezawa, S. ; Dept. of Mechatronics Dev., Fujitsu Labs. Ltd., Kawasaki, Japan ; Hara, T. ; Uematsu, Y. ; Yamada, T.

We have developed a piezoelectric microactuator for dual-stage actuator systems in magnetic disk drives. We installed the microactuator in one of Fujitsu's 3.5-inch commercial drives for evaluation of the servo system of dual-stage actuator. The dual-stage actuator system achieved the nonrepeatable position error (NRPE) 3σ values of 0.036 μm. The dual-stage servo system reduced the NRPE by 35% compared with the conventional single actuator system even in HDD's which has a high rotational speed of 10,000 rpm

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 2 )