Servo Writer Edge Polishing for Magnetic Tape Vibration Control

The patent applies preliminary action by pre-writing servo signals on the magnetic tape before data recording. These servo signals contain track information that enables the magnetic head to accurately trace data tracks even when tracks are narrowly spaced. The servo writer writes servo patterns in advance, creating a reference framework that guides subsequent data recording operations.

The patent uses servo signals as an intermediary between the magnetic head and the narrowly spaced data tracks. The servo signals act as a mediator that provides positioning information, allowing the magnetic head to locate and trace tracks accurately without directly relying on the physical spacing of the tracks themselves.

The patent applies preliminary action by providing a polishing unit that polishes the edges of the magnetic tape before the tape reaches the guide roller. This preliminary edge treatment prevents irregular contact with the flange, eliminating vibration sources before they can affect servo pattern writing accuracy.

The patent converts the potentially harmful effect of edge deformation into a benefit by using the polishing unit to intentionally modify the edges. The polishing process transforms irregular, harmful edges into smooth, controlled edges that maintain stable contact with the guide roller flange, converting a source of vibration into a source of stability.