| 摘要 |
Methods and apparatus for driving a tape relative to a slant track recording scanner or other surface employ an electric motor or a capstan rotating in a first sense of rotation for an advancement of the tape. The advancing tape is tensioned into engagement with the surface. The motor is selectively decelerated to stop the tensioned tape. In practice, this could bind the tape to the particular surface, rendering subsequent tape advancement difficult. The disclosed invention thus slackens the tensioned tape from the surface by rotating the motor or the capstan in a second sense of rotation opposite to the mentioned first sense of rotation upon deceleration of the motor or capstan. The back EMF of the decelerating motor may be utilized for this purpose. The electric motor or capstan is stopped upon slackening of the tape from the surface.
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