| 摘要 |
<p>A method and system for detecting tape attachment to a machine reel of an automatically threading magnetic tape system. During threading process, a file reel (18) is rotated to allow a sufficient length of tape to be unwound therefrom, which length of tape eventually attaches to the machine reel (28) after being automatically threaded through the desired tape path. The rotation of the file reel (18) is maintained during this threading process by delivering current pulses to a file reel motor (14). These current pulses are counted per unit time. As soon as the tape attaches to the machine reel (28), the machine reel begins to pull the tape from the file reel (18), thereby eliminating the need to deliver current pulses to te file reel motor at the same rate as needed prior to tape attachment. A change in the rate of the current pulses delivered to the file reel motor signals a tape attached condition. </p> |
