公开(公告)号：DE2530731A1

公开(公告)日：1976-01-29

申请号：DE2530731

申请日：1975-07-10

Applicant: IBM

Inventor： ARTER NELSON KAY ,  BROCK GEORGE WILLIAM ,  JACKSON HOWARD CARL ,  LEGGATE JAMES WARREN

IPC: H04N5/7826 ,  B65H23/032 ,  G05D13/62 ,  G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B15/54 ,  G11B15/60 ,  G11B15/61 ,  G11B27/13 ,  G11B5/55 ,  G11B15/52 ,  G11B27/36 ,  H04N5/78

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.