Browse Prior Art Database

Interlayer Slip Test

IP.com Disclosure Number: IPCOM000044008D
Original Publication Date: 1984-Oct-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Graham, SM: AUTHOR [+3]

Abstract

In reel-to-reel tape drives it is necessary to detect and eliminate any potential interlayer slip in a mounted tape reel. U.S. Patent 4,389,600 discusses this problem and provides one solution to it. It is often desirable to obtain a direct measurement of tape lineal speed rather than obtain that data indirectly from the rotational speed of the tape reels. In such a drive a velocity measurement tachometer is often provided in the tape path. The tachometer in the tape path can be used to detect interlayer slip during the acceleration of the tape. The interlayer slip test can be performed anywhere along the length of tape and places no stress on the tape beyond that which is normally applied whenever the tape is accelerated from a start/stop position to its normal operating speed.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Interlayer Slip Test

In reel-to-reel tape drives it is necessary to detect and eliminate any potential interlayer slip in a mounted tape reel. U.S. Patent 4,389,600 discusses this problem and provides one solution to it. It is often desirable to obtain a direct measurement of tape lineal speed rather than obtain that data indirectly from the rotational speed of the tape reels. In such a drive a velocity measurement tachometer is often provided in the tape path. The tachometer in the tape path can be used to detect interlayer slip during the acceleration of the tape. The interlayer slip test can be performed anywhere along the length of tape and places no stress on the tape beyond that which is normally applied whenever the tape is accelerated from a start/stop position to its normal operating speed. Interlayer slip can be detected whenever the tape is accelerated from a stop to its normal drive velocity. Any variation in the rate of acceleration beyond a nominal range is detected by the inline tachometer and is indicative of interlayer slip. When interlayer slip is detected the tape would be unwound and rewound from the point of detection of the slip, whereas with the detection arrangement described in U.S. Patent 4,389,600 it was necessary to unwind and rewind the entire reel.

1