Sensor system for disk device using floating head
View Patent ↗A sensor system for a disk device by using a floating head, comprising a head element that floats over a data recording area of a rotating disk so as to write data thereon or read data therefrom, a first actuator for moving the head element over the data recording area of the disk, and a second actuator supported by the first actuator and supporting the head element for precisely positioning the head element against the data recording area of the disk. The sensor system is capable of detecting any contact between the disk and the head element by utilizing a signal generated by the second actuator when the disk contacts the head element during an operation of the disk.
1. A sensor system for a floating head disk device comprising:
a rotating disk a data recording area;
a suspension member comprising first and second portions coupled together;
a head element mounted on the first portion for floating over the data recording area of the disk to write data thereon or read data therefrom;
a first actuator for moving the second portion to move the head element over the data recording area of the disk;
a second actuator coupling the first and second portions and for precisely positioning the head element over the data recording area of the disk by moving the first portion in a radial direction of the disk; and
a resonance canceller for canceling a torsional resonance generated between the first and second portions, by applying to the second actuator a signal having a phase opposite to a phase of a signal generated by the second actuator when the head element is floating.
2. A sensor system for a floating head disk device including a single-plate servo writer, said servo writer comprising:
a rotating disk having a data recording area;
a suspension member comprising first and second portions coupled together;
a head element mounted on the first portion for floating over a data recording area of the disk to write servo information thereon or read servo information therefrom;
a first actuator for moving the second portion to move the head element mounted on the first portion over the data recording area of the disk; and
a second actuator coupling the first and second portions and for precisely positioning the head element over the data recording area of the disk by moving the first portion in the radial direction of the disk; and
a resonance canceller for canceling a torsional resonance generated between the first and second portions, by applying to the second actuator a signal having a phase opposite to a phase of a signal generated by the second actuator when the head element is floating.