Title :
Piezo-based milliactuator on a partially etched suspension
Author :
Arya, S. ; Yau-Shing Lee ; Wei-Min Lu ; Staudenmann, M. ; Hatchett, M.
Author_Institution :
Storage Technol. Div., IBM Corp., San Jose, CA, USA
Abstract :
A milliactuator (moving-suspension secondary actuator) comprised of a pair of piezo-elements driving a partially etched thick loadbeam, provides increased servo bandwidth and reduced track-misregistration in a hard disk drive. A drive populated with 18 mm milliactuator assemblies with first torsion frequency (T1) at 6 kHz provided 60% higher servo bandwidth (0 dB open-loop crossover) compared to without the milliactuator. Further improvements to the milliactuator dynamics, sampling rate and computational time have potential to provide up to 100% higher servo bandwidth. The milliactuator provides a low cost, enhanced performance solution for high track densities.
Keywords :
disc drives; etching; hard discs; piezoelectric actuators; servomechanisms; torsion; hard disk drive; moving-suspension secondary actuator; partially etched suspension; piezoelectric milliactuator; servo bandwidth; torsion frequency; track density; track misregistration; Actuators; Assembly; Bandwidth; Costs; Drives; Etching; Frequency; Servomechanisms; Telephony; Voltage;
Conference_Titel :
Asia-Pacific Magnetic Recording Conference, 2000. APMRC 2000
Conference_Location :
Tokyo, Japan
Print_ISBN :
0-7803-6254-3
DOI :
10.1109/APMRC.2000.898930
