公开(公告)号：US4737868A

公开(公告)日：1988-04-12

申请号：US915229

申请日：1986-10-03

申请人： Kiyosi Kimura ,  Norio Nakayama ,  Yoshikazu Komatsu

发明人： Kiyosi Kimura ,  Norio Nakayama ,  Yoshikazu Komatsu

IPC分类号： G11B5/09 ,  G11B15/00 ,  G11B15/087 ,  G11B27/13 ,  G11B27/22 ,  G11B15/44

CPC分类号： G11B15/005 ,  G11B27/13 ,  G11B27/22

摘要： A repositioner for a streaming magnetic tape drive apparatus includes control circuitry which, when a repositioning instruction is received from an external device, supplies a drive stop instruction to a tape reel motor and a measurement start instruction to a tape travel distance measuring device when a first data block edge detection signal is reproduced from the tape within a certain time period. A tape stop detection signal is produced when forward movement of the tape ceases, and the control circuitry outputs a reverse drive instruction to the reel motor while supplying a reverse tape travel distance measurement start instruction to the distance measuring device. When the forward and reverse tape travel distances become equal and a data block edge detection signal is reproduced from the tape within a certain time period, a normal operation signal is provided to the external device to signal that a repositioning operation is normally performed. Accordingly, adjacent data blocks on the tape will not be erased, and data read access will not be started midway along an adjacent data block on the tape.

摘要翻译： 用于流式磁带驱动装置的重新定位器包括控制电路，当从外部装置接收到重新定位指令时，当第一个磁带驱动装置向磁带行进距离测量装置提供驱动停止指令到磁带卷轴马达和测量开始指令时， 数据块边缘检测信号在一定时间段内从磁带再现。 当磁带的向前移动停止时，产生磁带停止检测信号，并且控制电路在向距离测量装置提供反向行程距离测量开始指令的同时向卷轴电机输出反向驱动指令。 当正向和反向磁带移动距离变得相等并且在一定时间段内从磁带再现数据块边缘检测信号时，向外部设备提供正常操作信号以指示正常执行重新定位操作。 因此，磁带上的相邻数据块不会被擦除，并且数据读取访问将不会沿磁带上的相邻数据块的中途开始。

公开(公告)号：US4726542A

公开(公告)日：1988-02-23

申请号：US899933

申请日：1986-08-25

申请人： Norio Nakayama ,  Kiyosi Kimura ,  Yoshikazu Komatsu

发明人： Norio Nakayama ,  Kiyosi Kimura ,  Yoshikazu Komatsu

IPC分类号： G11B15/16 ,  G11B15/66 ,  G11B15/67 ,  G11B15/32

CPC分类号： G11B15/671 ,  G11B15/16

摘要： A reel position-detecting device for use in a magnetic tape drive unit, designed to determine whether or not a supply reel has been positioned upside down in a retainer. When reel-detecting means detects that the supply reel has been set in the retainer, the retainer is rotated in the opposite direction to the tape-supply direction. If tape supply-detecting means detects the magnetic tape and then ceases to detect the tape within a predetermined period, processing means determines that the supply reel has been correctly positioned. Otherwise, the processing means determines that the supply reel has been positioned upside down.

摘要翻译： 一种用于磁带驱动单元的卷轴位置检测装置，设计用于确定供带盘是否已经被放置在保持器中。 当卷轴检测装置检测到供带盘已经被固定在保持器中时，保持器沿与带供给方向相反的方向旋转。 如果磁带供给检测装置检测到磁带，然后在预定时间内停止检测磁带，则处理装置确定供应卷轴已经被正确定位。 否则，处理装置确定供应卷轴已经被倒置放置。