Method and apparatus for positioning transducers to correct for read and write element misregistration offsets which vary dependent on rotary actuator angular position across a disk medium

US5682274A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Dana H. Brown · Rochester, US
• Earl A. Cunningham · Rochester, US
• Kevin J. Erickson · Rochester, US
• Richard H. Estry · Rochester, US
• Thomas Glaser · Rochester, US
• Mark David Hagen · Rochester, US
• Hal Hjalmar Ottesen · Rochester, US
• Dean C. Palmer · Rochester, US
• John Jeffrey Stephenson · Rochester, US

Key dates

• Filing date: Feb 22, 1995
• Grant date: Oct 28, 1997
• Expiry date: Feb 22, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B7/08
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element and write element. The offset is determined at a first position and at a second position of the actuator arm assembly. From these offsets a constant and a multiplier are determined for determining an offset as a function of the cylinder location. Also disclosed is a method and apparatus for minimizing distance traveled to prevent misregistration when repositioning between the read element and a write element. The read element is intentionally offset from the write element at an angle so as to minimize the distance traveled across the disk.