Magnetic Head Tracking Servo with Segmented Movable and Stationary Members
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Solution Overview
Problem
The increasing recording capacity of magnetic tapes leads to a higher friction coefficient between the magnetic head and the tape, causing unstable tracking operations as the tape moves in the width direction, affecting precision and potentially damaging the tape.
Innovation Solution
A magnetic tape apparatus with a magnetic head unit and a tracking servo mechanism, featuring a movable member and a stationary member that come into contact with the magnetic tape's surface, allowing the movable member to move in the width direction while the stationary member stabilizes the tape, preventing it from moving with the head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the magnetic tape surface is smoothened to increase recording capacity, then the recording capacity increases, but the friction coefficient between the magnetic head and magnetic tape increases causing tracking instability
Solution Approach 1:
The magnetic head unit is divided into a movable member (containing the magnetic element) and a stationary member. The stationary member remains fixed while the movable member moves in the width direction, preventing the magnetic tape from being dragged along with the moving part and thus maintaining tracking stability despite high friction coefficient
Solution Approach 2:
Different parts of the magnetic head unit have different functions: the movable member performs tracking servo control by moving in the width direction, while the stationary member provides stable contact points that prevent tape movement. This local differentiation allows the system to achieve both high capacity (through smooth tape surface) and stable tracking (through differentiated head structure)
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances tracking precision by preventing the tape from moving in the width direction, even with high friction coefficients, and reduces the risk of tape damage by minimizing position changes, thus stabilizing tape travel.
Implementation Method 1
a magnetic head unit having a magnetic element capable of recording or reproducing information with respect to a magnetic tape that has a magnetic layer on one surface
Implementation Method 2
the magnetic tape moves in the tape width direction, following the movement of the magnetic head in the tape width direction by a tracking servo control and the like, with the result that the tracking operation of the magnetic head becomes unstable
Data Source
AI summary
In a magnetic tape apparatus of the present invention, a magnetic head unit having magnetic elements capable of recording or reproducing information with respect to a magnetic tape includes a movable member that includes a magnetic element and has such a size that the movable member comes into contact with the magnetic tape over an entire region in a width direction, and is placed so as to move in the width direction of the magnetic tape, and a stationary member that is placed at a position adjacent to the movable member in a magnetic tape transport direction, wherein the movable member is moved in the width direction of the magnetic tape by a tracking servo mechanism during a tracking servo control. According to this configuration, a magnetic tape apparatus excellent in a tracking precision can be provided, in which even a magnetic tape with a high friction coefficient does not move following the movement of a magnetic head unit in the width direction.