Title :
Use of composite structure to achieve variable rates of thermal expansion in disk drive arms
Author_Institution :
Seagate Corp., Scotts Valley, CA, USA
Abstract :
Summary form only given, as follows. Many drives with either 3.5-in or 5.25-in disks operate without any position feedback mechanism and required that materials used within the drive have carefully controlled coefficients of thermal expansion. Completely eliminating thermal offtrack by simply selecting from available materials is often not possible. A method of fine-tuning the offtrack is presented. The method involves adjusting the relative thickness of materials used in a bimetallic composite structure to provide the expansion desired. A computer model predicts results within the drive and a comparison is made of analytic and experimental results. In addition, an overview of the causes of offtrack under both thermal transient and steady-state conditions is presented
Keywords :
magnetic disc storage; thermal expansion; 3.5 in; 5.25 in; bimetallic; composite structure; computer model; disk drive arms; fine-tuning; relative thickness; steady-state conditions; thermal expansion; thermal offtrack; thermal transient; variable rates; Arm; Composite materials; Disk drives; Feedback; Hard disks; Predictive models; Steady-state; Thermal expansion; Tracking;
Conference_Titel :
Thermal Phenomena in the Fabrication and Operation of Electronic Components: I-THERM '88, InterSociety Conference on
Conference_Location :
Los Angeles, CA
DOI :
10.1109/ITHERM.1988.28695
