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Apparatus and method for controlling tape tension using acceleration and average tension deviation information to adjust motor drive currents
Apparatus and method for controlling tape tension using acceleration and average tension deviation information to adjust motor drive currents
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机译:使用加速度和平均张力偏差信息来调节电动机驱动电流的用于控制带张力的设备和方法
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摘要
The invention relates to a tape transport mechanism in which two reels are respectively driven by different motors, thereby transporting a magnetic tape from one reel to another reel by passing through the portion of a read/write head without any variation in tension. At the initial stage to transport the magnetic tape, an acceleration time from a stop state of the tape until a tape speed reaches a reference speed and an average tension deviation to be applied to the magnetic tape during this time are obtained. Correction values to correct variations in run characteristics of two reel drive systems are calculated by use of the acceleration time and the average tension deviation. Upon next and the subsequent magnetic tape transport, currents to be supplied to the motors to drive two reels are controlled by use of the drive current command values corrected by those correction values.
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