| 摘要 |
A tape drive comprising two tape spool supports on which spools of tape may be mounted, at least one spool being drivable by a respective motor, a controller for controlling the energization of said at least one motor such that the tape may be transported in at least one direction between spools mounted on the spool supports, and a sensor configured to obtain signals indicative of electromagnetic radiation reflected from the tape, wherein means are provided to process two signals obtained by said sensor and to generate an output signal indicative of movement of said tape based on said signals.
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