公开(公告)号：DE2533509A1

公开(公告)日：1976-02-26

申请号：DE2533509

申请日：1975-07-26

Applicant: IBM

Inventor： MCINTOSH ROBERT PHELPS ,  SHAHEIN HUSSEIN I

IPC: G11B21/10 ,  G11B5/596 ,  G11B5/55 ,  G11B21/08

Abstract: A control system for positioning a magnetic disk transducer head includes a primary carriage which provides large magnitude positioning movements and supports in a "piggyback" arrangement a low mass secondary carriage which positions the head relative to the primary carriage to provide highly accurate, extremely fast response over small distances on the order of one track width. Improved operating characteristics are obtained to permit increased track density by simultaneously and continuously controlling both carriages in response to a single position error signal with the secondary carriage being biased toward a zero displacement position relative to the primary carriage.

公开(公告)号：FR2281624A1

公开(公告)日：1976-03-05

申请号：FR7518983

申请日：1975-06-09

Applicant: IBM

Inventor： MCINTOSH ROBERT PHELPS ,  SHAHEIN HUSSEIN I

IPC: G11B21/10 ,  G11B5/596 ,  G11B25/04

Abstract: A control system for positioning a magnetic disk transducer head includes a primary carriage which provides large magnitude positioning movements and supports in a "piggyback" arrangement a low mass secondary carriage which positions the head relative to the primary carriage to provide highly accurate, extremely fast response over small distances on the order of one track width. Improved operating characteristics are obtained to permit increased track density by simultaneously and continuously controlling both carriages in response to a single position error signal with the secondary carriage being biased toward a zero displacement position relative to the primary carriage.