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:
May. 08, 2001
Filed:
Sep. 09, 1997
Andrew John Hudson, Santa Cruz, CA (US);
Michael John Raffetto, Scotts Valley, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
Differing gram loads and actuator arm resonances are compensated for through the method and apparatus of positioning z-height of outer actuator arm at an optimal height. Specifically, an actuator arm driven by a closed loop servo motor system for a disc drive system is configured so that the outer upper and lower actuator arms are positioned at an optimum distance, called optimum z-height, from the disc surface. At the optimum z-height position, the gram load of the outer actuator arms are shifted as near as possible to the gram load of the inner actuator arms. At the optimum z-height, the resonances on the head gimbal assemblies of the inner and outer actuator arms are closest.