公开(公告)号：CA1043012A

公开(公告)日：1978-11-21

申请号：CA227643

申请日：1975-05-23

Applicant: IBM

Inventor： ARTER NELSON K ,  BROCK GEORGE W ,  JACKSON HOWARD C ,  LEGGATE JAMES W

IPC: H04N5/7826 ,  B65H23/032 ,  G05D13/62 ,  G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B15/54 ,  G11B15/60 ,  G11B15/61 ,  G11B27/13 ,  G11B21/04 ,  G11B15/46

Abstract: TRANSVERSE TRACK LOCATION A track or stripe tape positioner for a helical scan or rotary head recorder uses digital techniques. The expected step size is preset into a counter. During the next phase, a calibration phase, the tape is stepped through a plurality of stripes whereat the present value is adjusted to measured values. In the third phase, the average step size is maintained subject to certain averaged changes thus providing a high degree of noise rejection to ensure reliable incremental stepping of a record tape through the recorder.

公开(公告)号：FR2278131A1

公开(公告)日：1976-02-06

申请号：FR7518999

申请日：1975-06-12

Applicant: IBM

Inventor： ARTER NELSON K ,  JACKSON HOWARD C ,  LEGGATE JAMES W

IPC: B65H23/032 ,  G05D13/62 ,  H04N5/7826 ,  G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B15/54 ,  G11B15/60 ,  G11B15/61 ,  G11B27/13 ,  G11B5/02

Abstract: A track or stripe tape positioner for a helical scan or rotary head recorder uses digital techniques. The expected step size is preset into a counter. During the next phase, a calibration phase, the tape is stepped through a plurality of stripes whereat the preset value is adjusted to measured values. In the third phase, the average step size is maintained subject to certain averaged changes thus providing a high degree of noise rejection to ensure reliable incremental stepping of a record tape through the recorder.