Tape drive having an arcuate scanner and a method for calibratin

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

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360 721, G11B 2110

Patent

active

058153373

ABSTRACT:
A tape drive with an arcuate scanner and a method for calibrating the arcuate scanner double wraps recording tape on the scanner to create two scanner/tape contact zones. The two crossings of a scannable line on the recording tape by a scanner head permit the transit times of the scanner head above the scannable line and below the scannable line to be measured. A comparison of the transit times provides an indication as to whether the center of rotation of the scanner is correctly pointing at the recording tape centerline, and corrective action is taken if there is a pointing error. Once the scanner is correctly pointed, an accurate calibration of the scanner, including the commutation and timing between read and write operations, is performed by measuring the transit time of a scanner head from a stationary point to a defined location on the tape.

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