Servo writer and servo signal writing method

Abstract

A servo writer for writing a servo signal in a running tape memory medium comprises: a head which is arranged in a vicinity of a running path of the running tape memory medium; and a pair of guides which are disposed adjacent to the head in an upstream and downstream of the head in a tape running direction, wherein at least one of the head and pair of guides has a flange with which one edge the tape memory medium set in the running path runs is in contact, while the tape memory medium is running between the pair of guides, wherein the head has a sliding surface which slides in contact with a recording surface of the running tape memory medium, wherein the sliding surface is set with an inclination against a tape width direction of the tape memory medium, and the tape memory medium, which is running, is guided by the flange by having the one edge of the tape memory medium slide in contact with the flange.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is an enlarged view of a magnetic tape in a tape width direction;

FIG. 1B is a schematic illustration showing a manufacturing status of a plurality of magnetic tapes by cutting an original magnetic tape into a predetermined width with a slitter unit;

FIG. 2 is a servo writer configuration diagram according to an embodiment of the present invention;

FIG. 3 is a perspective view showing a writing head and guides;

FIG. 4 is a cross sectional view cut along a IV-IV line in FIG. 3;

FIG. 5 is a cross sectional view cut along a V-V line in FIG. 3;

FIG. 6A is a figure showing a value of PES, in which a servo signal is written by a writing head with a predetermined tilt angle, with respect to a longitudinal position of a magnetic tape;

FIG. 6B is a figure showing a value of PES, in which a servo signal is written by a writing head without a tilt (with zero tilt angle), with respect to a longitudinal position of a magnetic tape.

Claims

1. A servo writer for writing a servo signal in a running tape memory medium, comprising: a head which is arranged in a vicinity of a running path of the running tape memory medium; anda pair of guides which are disposed adjacent to the head in an upstream and downstream of the head in a tape running direction, wherein at least one of the head and pair of guides has a flange with which one edge the tape memory medium set in the running path runs is in contact, while the tape memory medium is running between the pair of guides, wherein the head has a sliding surface which slides in contact with a recording surface of the running tape memory medium, wherein the sliding surface is set with an inclination against a tape width direction of the tape memory medium, and the tape memory medium, which is running, is guided by the flange by having the one edge of the tape memory medium slide in contact with the flange.

2. The servo writer according to claim 1, wherein the inclination of the sliding surface against the tape width direction is not more than 1 (one) degree.

3. The servo writer according to claim 1, wherein the head comprises a writing head for writing a servo signal in the running tape memory medium.

4. The servo writer according to claim 1, wherein the head comprises a verifying head for verifying a servo signal written on the running tape memory medium.

5. A servo signal writing method, comprising steps of: a step for preparing a servo writer according to claim 3;a step for setting a tape memory medium on the servo writer; anda step for writing a servo signal in the tape memory medium by the writing head, by running and sliding the tape memory medium in contact with the sliding surface of the writing head, while sliding the one edge of the tape memory medium in contact with the flange.

6. The servo signal writing method according to claim 5, wherein in the step for setting the tape memory medium, when a magnetic tape runs, which comprises a support and a magnetic layer formed on the support and has a first edge where the support is projected to an end face of the magnetic tape more than the magnetic layer, the first edge slides in contact with the flange.

7. The servo signal writing method according to claim 5, wherein the step for writing a servo signal comprises: a step for DC magnetizing a servo band in an upstream of the writing head in the tape running direction so that a magnetic direction is oriented to one direction; anda step for writing a servo signal in an opposite direction of the one direction.

8. A servo signal verifying method, comprising steps of: a step for preparing a servo writer according to claim 4;a step for setting a tape memory medium on the servo writer; anda step for verifying a servo signal written on the tape memory medium by the verifying head, by having the tape memory medium run in contact with the sliding surface of the verifying head, while sliding the one edge of the tape memory medium in contact with the flange.

9. The servo signal verifying method according to claim 8, wherein in the step for setting the tape memory medium, when having a magnetic tape run, which comprises a support and a magnetic layer formed on the support and has a first edge where the support is projected to an end face of the magnetic tape more than the magnetic layer, the first edge slides in contact with the flange.

10. The servo writer according to claim 1, wherein the tape memory medium comprises a magnetic tape and an optical memory medium.