Magnetic floppy disc drive receiving two discs having different sizes
    1.
    发明授权
    Magnetic floppy disc drive receiving two discs having different sizes 失效
    磁盘驱动器接收两个不同尺寸的光盘

    公开(公告)号:US5572383A

    公开(公告)日:1996-11-05

    申请号:US247116

    申请日:1994-05-20

    摘要: A disc drive device includes a base, a rotary member rotatably supported on the base and a first chucking mechanism for holding a first kind of disc-shaped recording medium while coinciding a rotational center of the first kind of recording medium with a rotational center of the rotary member. The first chucking mechanism is arranged at one end of the rotary member. A second chucking mechanism holds a second kind of disc-shaped recording medium different from the first kind of recording medium with respect to size or disc formatting while coinciding a rotational center of the second kind of recording medium with a rotational center of the rotary member. The second chucking mechanism is arranged at the other end of the rotary member. A driving mechanism is mounted on the base for driving the rotary member.

    摘要翻译: 盘驱动装置包括基座,可旋转地支撑在基座上的旋转构件和用于保持第一种盘形记录介质的第一夹紧机构,同时使第一类记录介质的旋转中心与 旋转构件。 第一夹紧机构布置在旋转构件的一端。 第二夹持机构相对于尺寸或盘格式保持与第一类记录介质不同的第二种盘形记录介质,同时使第二类记录介质的旋转中心与旋转构件的旋转中心重合。 第二夹紧机构布置在旋转构件的另一端。 驱动机构安装在基座上用于驱动旋转构件。

    Head position control device
    2.
    发明授权
    Head position control device 失效
    头位置控制装置

    公开(公告)号:US4563715A

    公开(公告)日:1986-01-07

    申请号:US457487

    申请日:1983-01-12

    CPC分类号: G11B5/4886 G11B5/5547

    摘要: A head position control device capable of controlling the position of mutually cooperating plural heads with a circuit provided in a drive thereby reducing the burden of the attached system and enabling independent seeking operations of the heads on a magnetic disk. The head position control device of the present invention performs track seeking operation within a minimum time regardless of the access time of the attached system thereby reducing the head switching time, and also allows reduction in the dimension and weight of the entire system.

    摘要翻译: 一种头位置控制装置,其能够利用设置在驱动器中的电路来控制相互协作的多个头部的位置,从而减少附接系统的负担,并使得磁头在磁盘上的独立的寻道操作。 本发明的头位置控制装置不管连接系统的访问时间如何,在最小时间内执行追踪操作,从而降低了头切换时间,并且还减少了整个系统的尺寸和重量。

    Seek method and apparatus
    3.
    发明授权
    Seek method and apparatus 失效
    寻求方法和设备

    公开(公告)号:US5545963A

    公开(公告)日:1996-08-13

    申请号:US220485

    申请日:1994-03-31

    申请人: Nobuhiro Aizawa

    发明人: Nobuhiro Aizawa

    IPC分类号: H02P8/18 H02P8/00

    CPC分类号: H02P8/18

    摘要: A seek method and an apparatus using a stepping motor, which can eliminate disadvantages of the two-phase excitation (large seek noise and great power consumption) while maintaining advantages of the two-phase excitation (large torque and high stop accuracy). A stepping motor is driven by two-phase exciting signals, each of which includes a short term one-phase excitation state whose duration is shorter than a pulse interval of a step pulse train. The one-phase excitation state is inserted between two consecutive two-phase excitation states. A two-phase exciting signal associated with a start or a change in seek direction may exclude the one-phase excitation state so that the stepping motor can produce large torque.

    摘要翻译: 在保持两相励磁(大转矩和高停止精度)的优点的同时可以消除二相励磁的缺点(大的寻道噪声和大功率消耗)的步进电机的寻道方法和装置。 步进电机由两相励磁信号驱动,每个励磁信号包括持续时间短于步进脉冲串脉冲间隔的短期单相励磁状态。 单相激励状态被插入在两个连续的两相激励状态之间。 与寻道方向的开始或变化相关联的两相励磁信号可以排除单相励磁状态,使得步进电机能够产生大的转矩。