| 摘要 |
PCT No. PCT/JP94/01396 Sec. 371 Date Mar. 23, 1995 Sec. 102(e) Date Mar. 23, 1995 PCT Filed Aug. 24, 1994 PCT Pub. No. WO95/06314 PCT Pub. Date Mar. 2, 1995A loading and unloading device for loading and unloading a head slider has an actuator driver circuit 11 for driving an actuator 3 with pulses. A counterelectromotive force generated by a voice coil of the actuator is detected when the pulses are off, and fed back to the actuator driver circuit 11 to enable the actuator driver circuit 11 to control the position and speed of the actuator. The speed at which the head slider is loaded and unloaded can thus be controlled into a desired value to minimize the danger of collision between a head and a disk.
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