公开(公告)号：DE2648396A1

公开(公告)日：1977-05-18

申请号：DE2648396

申请日：1976-10-26

Applicant: IBM

Inventor： KOSKI JOHN ALEXANDER ,  LISSNER RUDOLF WERNER ,  ROBERTS SPENCER DONALD

IPC: G05D13/62 ,  B65H23/18 ,  B65H77/00 ,  G11B15/30 ,  G11B15/43 ,  G11B15/46 ,  G11B15/48 ,  G11B15/54 ,  G11B27/13

Abstract: A reel-to-reel web (tape) transport apparatus which has no tape length buffering between the supply and take-up reels. The tape follows a fixed length path from the supply reel, past a read/write head and guides, to a take-up reel. A two motor control mechanism is employed in which one motor drives the take-up reel and one motor drives the supply reel to maintain the appropriate tension and tape motion at the read/write head. The control mechanism is adaptive to dynamic changes as the tape is moved from the supply reel to the take-up reel. Three quantities are monitored: lineal tape position and the angular reel displacement of the supply and take-up reel. From these quantities reel radii are derived, tape inertia calculated and the velocity or position error is determined. A motor current algorithm is utilized to generate the appropriate torque for each reel to drive the control error to zero along a predetermined profile with negligible tape tension disturbances. The result is a reel-to-reel tape drive with static and dynamic performance characteristics which are independent of reel radius and inertia changes resulting from tape motion.

公开(公告)号：AU4940672A

公开(公告)日：1974-05-30

申请号：AU4940672

申请日：1972-11-29

Applicant: IBM

Inventor： MULVANY RICHARD BURKE ,  LISSNER RUDOLF WERNER

IPC: G11B23/03 ,  G11B5/55 ,  G11B15/68 ,  G11B17/02 ,  G11B17/022 ,  G11B17/032 ,  G11B19/20 ,  G11B21/02 ,  G11B25/04 ,  H02K33/18 ,  G11B23/02

Abstract: A disk storage apparatus includes an interchangeable sealed cartridge, enclosing magnetic disks, accessing magnetic head arm assemblies, a movable carriage to which the head arms are mounted, and a drive spindle on which the disks are seated. For accessing the heads to selected data tracks, coupling means are provided to engage the carriage and head arm assemblies with an external actuator, such as a linear D.C. motor or voice coil motor, disposed in a disk file housing. The file housing includes a drive motor coupled by pulley means, for example, to the enclosed spindle to provide rotary motion to the disks.

公开(公告)号：DE2260201A1

公开(公告)日：1973-06-20

申请号：DE2260201

申请日：1972-12-08

Applicant: IBM

Inventor： MULVANY RICHARD BURKE ,  LISSNER RUDOLF WERNER

IPC: G11B23/03 ,  G11B5/55 ,  G11B15/68 ,  G11B17/02 ,  G11B17/022 ,  G11B17/032 ,  G11B19/20 ,  G11B21/02 ,  G11B25/04 ,  H02K33/18 ,  G11B5/00

Abstract: A disk storage apparatus includes an interchangeable sealed cartridge, enclosing magnetic disks, accessing magnetic head arm assemblies, a movable carriage to which the head arms are mounted, and a drive spindle on which the disks are seated. For accessing the heads to selected data tracks, coupling means are provided to engage the carriage and head arm assemblies with an external actuator, such as a linear D.C. motor or voice coil motor, disposed in a disk file housing. The file housing includes a drive motor coupled by pulley means, for example, to the enclosed spindle to provide rotary motion to the disks.