Dynamic pitch and roll sensing in hard disk drives
AssigneeSamsung Electronics Co., Ltd.
InventorsVinod Sharma, Dongman Kim
Life of this patent
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Abstract
A head for a hard disk drive that includes a primary read element and a first sensor read element coupled to a head body. The first sensor read element is offset from the primary read element. The first sensor read element provides a read signal that can be analyzed to determine a pitch of the head. The head may also have a second sensor read element that is offset from the first sensor read element. The second sensor read element provides a read signal that can also be analyzed to determine a pitch of the head. Read signals of the first and second sensor read elements can be analyzed to determine a roll of the head.
Claims13
A head for a hard disk drive, comprising:
- a body;
- a primary read element coupled to said body;
- and,
- a first sensor read element coupled to said body and offset from said primary read element.
A hard disk drive, comprising:
- a disk that contains a signal;
- a spindle motor that rotates said disk;
- a head that is coupled to said disk, said head including;
- a body;
- a primary read element coupled to said body;
- a first sensor read element coupled to said body and offset from said primary read element;
- and,
- a controller coupled to said head.
A method for determining a fly characteristic of a head in a hard disk drive, comprising:
- receiving a read signal from a first sensor read element offset from a primary read element of a head;
- and,
- analyzing the read signal to determine a fly characteristic of the head.
Dependencies are inferred from the claim text.