G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.21
G11B 27/30 (2006.01) G11B 15/00 (2006.01) G11B 15/18 (2006.01) G11B 15/60 (2006.01) G11B 15/61 (2006.01) G11B 27/10 (2006.01) H04N 5/7826 (2006.01)
Patent
CA 1039846
METHOD AND APPARATUS FOR SENSING RELATIVE POSITION BETWEEN HEAD AND TRACK IN TRANSVERSE MAGNETIC RECORDING ABSTRACT OF THE DISCLOSURE When transverse or slant tracks are recorded on magnetic tape, control of the position of the transverse transducer relative to the transverse track is critical in reading out the information in the transverse tracks. This control has facets--finding a predetermined slant track and aligning the transducer and the slant track. The transverse track position sensing system shown herein provides control signals for these two functions. The position sensing is accomplished by use of a fixed head positioned relative to the path of the transverse transducer. The fixed head scans an area of the magnetic tape where each transverse track ends. Signals from the fixed head are analyzed to determine the track end position of each slant or transverse track. This information is, in turn, operated on to derive tape movement control information for the purposes of finding a slant track and aligning the track with the path of the slant track head. For greater accuracy in align- ment, a second fixed head is provided for monitoring the other end of the transverse track to determine the angle of the slant track relative to the path of the slant track head. If the angles are not the same, corrections may be made by adjusting tape movement.
186740
Hart Gary A.
Kollar Ernest P.
Luhrs Otto R.
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