Method and apparatus for predicting capstan slip in tape drives

Details Method and apparatus for predicting capstan slip in tape drives Method and apparatus for predicting capstan slip in tape drives

1997-12-18

2000-04-18

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Miscellaneous

360 71, 360 7304, 360 7309, 242340, 242341, 2423524, G11B 576

Patent

active

06052264&

ABSTRACT:
A method and apparatus is disclosed for predicting capstan slipping in belt-driven tape cartridges. The method predicts the occurrence of capstan slip conditions between the belt capstan of a belt-driven tape cartridge and the rotating elastomeric drive roller of the tape drive. To predict capstan slip conditions, the method determines a critical velocity value corresponding to a critical slip condition based on a relationship between the drive force which rotates the cartridge belt capstan, and on the normal force of the drive roller against the cartridge belt capstan. A threshold velocity value corresponding to the drive and normal forces is selected at a point where the relationship between the drive and normal forces would not yet encounter the critical slip condition. The steady-state tape velocity is monitored during operation of the tape cartridge in the tape drive, and an imminent capstan slip indication is provided when the steady-state tape velocity reaches the threshold velocity value.

REFERENCES:
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patent: 4442985 (1984-04-01), Kishi et al.
patent: 4553182 (1985-11-01), Narita
patent: 5850316 (1998-12-01), Sato et al.

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