Detection of instantaneous speed variations in a tape drive

Details Detection of instantaneous speed variations in a tape drive Detection of instantaneous speed variations in a tape drive

1985-06-24

1986-12-30

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 39, 360 73, G11B 2736, G11B 2722

Patent

active

046333339

ABSTRACT:
With high density reel-to-reel tape drives, slight perturbations in the tape path can cause instantaneous speed variations in the tape which can alter the recording density of data on the tape over a very short interval. This condition can be detected by measuring changes in recording intervals on a plurality of data tracks. Whenever all of the tracks indicate an unacceptable change in the recording interval an unacceptable speed variation has been encountered.

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patent: 4409628 (1983-10-01), Frimet et al.
patent: 4446494 (1984-05-01), Stockham, Jr. et al.

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