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
February 22, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for recording and reproducing video and sound Method of and apparatus for writing data on a recording medium and the medium so produced Predictive positioning offset compensation for high TPI disk systems Magnetic disk recording with variable track width and variable track density Offset nulling system for computer disk drives Dual sector servo system for disk file with separate read and write heads Disc drive apparatus with servo tracks offset from data tracks Patent #: 5235478 Inventors
ApplicationNo. 392276 filed on 02/22/1995US Classes:360/77.04, By memory storage of repeatable error or correction360/77.08Distinct servo sectorExaminersPrimary: Young, W. R.Assistant: Habermehl, James L Attorney, Agent or FirmInternational ClassG11B 005/596AbstractAn 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. | |
