公开(公告)号：FR2588687B3

公开(公告)日：1987-10-30

申请号：FR8613880

申请日：1986-10-06

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/03 ,  G11B3/58

公开(公告)号：GB2181881A

公开(公告)日：1987-04-29

申请号：GB8624629

申请日：1986-10-14

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/50 ,  G11B23/04

公开(公告)号：FR2588687A3

公开(公告)日：1987-04-17

申请号：FR8613880

申请日：1986-10-06

Applicant: BASF AG

Inventor： GRUEHN DIETRICH ,  HACK JOACHIM ,  FEHRENBACH HUBERT ,  RUDOLF PETER ,  HOLL NORBERT

IPC: G11B23/033 ,  G11B23/03 ,  G11B3/58

公开(公告)号：GB2124714B

公开(公告)日：1986-02-26

申请号：GB8316118

申请日：1983-06-13

Applicant: BASF AG

Inventor： HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  BIKENMEIER KLAUS

IPC: G11B5/55 ,  G11B21/02 ,  G11B21/08 ,  F16C23/06

Abstract: A positioning device, comprising a cylindrical guide element and a guide surface, is so designed that an angle of less than 90 DEG , especially of from 1 DEG to 80 DEG , is formed between an axis at right angles to the direction of movement of the guide element over the guide surface and the axis of rotation of the guide element, in the plane containing these two axes. The peripheral surface of the guide element can be grooved or convex. The novel positioning device can be used with advantage in any type of recording/playback apparatus for disk records.

公开(公告)号：AU4268485A

公开(公告)日：1985-11-21

申请号：AU4268485

申请日：1985-05-17

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBERT WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B21/02

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：GB2115971A

公开(公告)日：1983-09-14

申请号：GB8233743

申请日：1982-11-26

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  BROTZLER ROLAND ,  HACK JOACHIM

IPC: G11B17/028 ,  G11B19/00 ,  G11B17/02

公开(公告)号：DE58907173D1

公开(公告)日：1994-04-14

申请号：DE58907173

申请日：1989-10-19

Applicant: BASF AG

Inventor： HACK JOACHIM ,  GRAU WERNER DR ,  SICKMUELLER WERNER ,  MANNSPERGER HEINRICH DR ,  JAKUSCH HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  HAMMERSCHMITT PETER ,  BROSIUS SIBYLLE DR ,  FEUERHERD KARL-HEINZ DR ,  ALBERT BERNHARD DR ,  SCHMITT MICHAEL DR ,  ACKER MICHAEL DR

IPC: G11B5/41 ,  G11B5/54 ,  G11B7/005 ,  G11B11/105 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

公开(公告)号：DE3836129A1

公开(公告)日：1990-04-26

申请号：DE3836129

申请日：1988-10-22

Applicant: BASF AG

Inventor： HACK JOACHIM ,  GRAU WERNER DR ,  SICKMUELLER WERNER ,  MANNSPERGER HEINRICH DR ,  JAKUSCH HELMUT DR

IPC: G11B21/12 ,  G11B5/41 ,  G11B5/54 ,  G11B7/005 ,  G11B11/105 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

Abstract: A method and an arrangement for reducing wear in magnetic storage means having magnetic disks, in particular having flexible media, become effective when predetermined maximum waiting times of the heads on the same track or the same tracks have elapsed. The heads HD are moved away from the waiting tracks in accordance with the predetermined control scheme, may be moved in waiting areas of the magnetic surface, and are moved back to the waiting position.

公开(公告)号：HK62289A

公开(公告)日：1989-08-11

申请号：HK62289

申请日：1989-08-03

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

公开(公告)号：DD234518C4

公开(公告)日：1987-01-28

申请号：DD27642385

申请日：1985-05-16

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGER KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36 ,  G11B27/32

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.