The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 2011
Filed:
Nov. 04, 2009
Armando Jesus Argumedo, Tucson, AZ (US);
Nhan Xuan Bui, Tucson, AZ (US);
Reed Alan Hancock, Tucson, AZ (US);
Roger Javier Justo, Tucson, AZ (US);
Angeliki Pantazi, Thalwil, CH;
Armando Jesus Argumedo, Tucson, AZ (US);
Nhan Xuan Bui, Tucson, AZ (US);
Reed Alan Hancock, Tucson, AZ (US);
Roger Javier Justo, Tucson, AZ (US);
Angeliki Pantazi, Thalwil, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods, servo systems, and data storage drives follow the lateral shift excursions of longitudinal tape, for example, from flangeless tape guides. A servo sensor is configured to sense lateral position of a tape head with respect to longitudinal servo tracks of the tape, a fine actuator is configured to translate the head laterally, and a coarse actuator is configured to translate the fine actuator laterally. Position error is determined between the head and a desired position related to the servo track, and the fine actuator operated to translate the head laterally to reduce the position error. In the embodiment, lateral shift excursion is sensed from the position error, and the coarse actuator is positioned substantially at a midpoint of the lateral shift excursion. Thus, the fine actuator follows the lateral shift excursions, while the coarse actuator remains at the midpoint.