Claims
- 1. A servo positioning system, comprising:
- (a) a magnetic recording medium having a designated servo section on the medium;
- (b) a magnetically recorded servo signal on the servo section of the medium, wherein the servo signal has a length and a width perpendicular thereto which has distinguishable transitions between periodically erased zones and adjacent continuously written zones;
- (c) a magnetic head comprising a first transducer which acts as a data transducer and second and third transducers which act as servo read transducers, wherein the third transducer is longitudinally spaced apart from the second transducer along the length of the servo signal, wherein the second and third transducers each generate first signal bursts in response to the periodically erased zones and second signal bursts in response to the continuously written zones;
- (d) means of generating a first error signal from the second transducer and a second error signal from the third transducer by comparing (1) a ratio of amplitudes of the first and second signal bursts with (2) a fixed ratio of the amplitudes as determined when the second and third transducers are correctly positioned on the servo section;
- (e) means for generating a third error signal by averaging the first and second error signals; and
- (f) means responsive to the third error signal for repositioning the first transducer, whereby the first transducer is centered along a given data track on the recording medium.
- 2. The system of claim 1, wherein the magnetic recording medium is magnetic recording tape.
- 3. The system of claim 1, wherein the second and third transducers are transversely displaced across the magnetic head from the first transducer.
- 4. The system of claim 1, wherein the fixed ratio is 1:2.
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 07/741,677 filed Aug. 7, 1991 now abandoned, which is a division of U.S. patent application Ser. No. 07/712,346, filed Jun. 7, 1991, assigned to the assignee of this application, U.S. Pat. No. 5,229,895.
US Referenced Citations (27)
Non-Patent Literature Citations (4)
Entry |
Irwin Magnetics, Specification, "Serial Recorded Magnetic Tape--Mini Data Cartridge for Information Interchange" dated Jun. 13, 1988, No. 6000340SP. |
IBM Technical Disclosure Bulletin, "Re-Recordable Servo System for Multi-Track Tape", T. Schwarz, vol. 25, No. 2, (Jul. 1982), pp. 778-779. |
IBM Technical Disclosure Bulletin, "Servo Control of Multielement Magnetic Heads", V. Zimmermann and R. Zuehlke, vol. 15, No. 4, (Sep. 1972), pp. 1320-1321. |
IBM Technical Disclosure Bulletin, "Interleaved Multielement Magnetic Heads", T. Stenning, vol. 14, No. 7, (Dec. 1971), p. 2129. |
Divisions (1)
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712346 |
Jun 1991 |
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Continuations (1)
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741677 |
Aug 1991 |
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