Method and apparatus for the high speed driving of a stepper motor
against seek error upon power restoration in a microcomputer system
    3.
    发明授权
    Method and apparatus for the high speed driving of a stepper motor against seek error upon power restoration in a microcomputer system 失效
    一种用于微机系统中的电力恢复时的步进电机的高速驱动与寻道误差的方法和装置

    公开(公告)号:US5434724A

    公开(公告)日:1995-07-18

    申请号:US201774

    申请日:1994-02-25

    CPC classification number: G11B19/00

    Abstract: A microcomputer system having a flexible magnetic disk drive and a controller therefor, with the disk drive including a stepper motor for incrementally moving a transducer from track to track on a rotating magnetic disk, and a clock which is inherently unstable in operation during a predefinable startup period thereof after being powered on. In order to enable the disk drive to internally generate stepping pulses for driving the stepper motor at twice as high a rate as by external stepping pulses from the controller without being affected by unstable clock pulses during the startup period of the clock, the controller supplies external stepping pulses to the disk drive after imparting a predetermined delay, longer than the startup period of the clock, to each series of external stepping pulses with respect to the moment a power save signal, also supplied from the controller to the disk drive, indicates that the clock and other power consuming parts of the disk drive be powered. Within the disk drive a counter counts the clock pulses for a length of time equal to half the period of each series of external stepping pulses in response to each incoming external stepping pulse, thereby providing output pulses that rise with the respective external stepping pulses. A pulse generator circuit generates internal stepping pulses in synchronism with both leading and trailing edges of the counter output pulses. Additional embodiments are disclosed.

    Abstract translation: 一种具有柔性磁盘驱动器及其控制器的微计算机系统,其中磁盘驱动器包括步进马达,该步进马达用于在旋转磁盘上逐渐地将传感器从轨道移动到轨道,以及在预定义启动期间操作中固有地不稳定的时钟 上电后的周期。 为了使磁盘驱动器内部产生用于驱动步进电机的步进脉冲,其速度是来自控制器的外部步进脉冲的两倍,而不受时钟启动期间不稳定的时钟脉冲的影响,控制器提供外部 相对于从控制器向磁盘驱动器提供的功率保存信号的时刻,向每个系列的外部步进脉冲施加比时钟的启动时间长的预定延迟,向盘驱动器提供步进脉冲, 磁盘驱动器的时钟和其他耗电部分被供电。 在磁盘驱动器内,计数器响应于每个进入的外部步进脉冲,对时钟脉冲计数等于每一系列外部步进脉冲的周期的一半的时间长度,从而提供随着各个外部步进脉冲而上升的输出脉冲。 脉冲发生器电路与计数器输出脉冲的前沿和后沿同步产生内部步进脉冲。 公开了另外的实施例。

    Method and apparatus for discriminating between unformatted magnetic
disk assemblies of two different storage capacities
    4.
    发明授权
    Method and apparatus for discriminating between unformatted magnetic disk assemblies of two different storage capacities 失效
    用于区分两个不同存储容量的未格式化磁盘组件的方法和装置

    公开(公告)号:US5329510A

    公开(公告)日:1994-07-12

    申请号:US983116

    申请日:1992-11-30

    CPC classification number: G11B19/04 G11B19/12 G11B20/1252 G11B20/1833

    Abstract: A data transfer system of the type including a disk drive for selective use with flexible magnetic disk cartridges of first and second storage capacities (e.g. 1 MB and 4 MB), the first storage capacity being less than the second storage capacity, a host computer, and a controller for controlling the operation of the disk drive under the direction of the host computer. The controller is factory preprogrammed to discriminate between unformatted disk cartridges of the two different storage capacities as either of the two types of disk cartridges is loaded in the disk drive. The program is such that, in response to the first of a series of formatting commands at the first storage capacity from the host computer, the controller causes the disk drive to write track format for the second storage capacity on a preassigned track (e.g. inmost track) on the disk and then immediately to read the track format. If the retrieved track format contains errors, it follows that the loaded disk cartridge is of the first storage capacity. Accordingly, the controller proceeds to format the disk cartridge at the first storage capacity. If the retrieved track format does not contain errors, on the other hand, then the loaded disk cartridge is of the second storage capacity. Thereupon the controller signals the host computer to that effect.

    Abstract translation: 一种数据传输系统,包括用于选择性地使用第一和第二存储容量(例如1MB和4MB)的柔性磁盘盒的磁盘驱动器,第一存储容量小于第二存储容量,主计算机, 以及用于在主计算机的方向上控制磁盘驱动器的操作的控制器。 控制器出厂预编程,以区分两种不同存储容量的未格式化的磁盘盒,因为两种类型的磁盘盒都装载在磁盘驱动器中。 该程序使得响应于来自主计算机的第一存储容量的一系列格式化命令中的第一个,控制器使得磁盘驱动器在预分配的轨道(例如,最前面的轨迹)上写入用于第二存储容量的磁道格式 )在磁盘上,然后立即读取轨道格式。 如果检索到的磁道格式包含错误,则装载的磁盘盒是第一个存储容量。 因此,控制器以第一存储容量进行格式化盘盒。 另一方面,如果检索到的磁道格式不包含错误,则装入的磁盘盒具有第二存储容量。 因此,控制器向主机发出信号。

    Assembling position adjusting mechanism of a spindle motor for a
magnetic disk apparatus
    5.
    发明授权
    Assembling position adjusting mechanism of a spindle motor for a magnetic disk apparatus 失效
    用于磁盘装置的主轴电机的组装位置调整机构

    公开(公告)号:US5309628A

    公开(公告)日:1994-05-10

    申请号:US992134

    申请日:1992-12-17

    Abstract: An assembling position-adjusting mechanism of a magnetic disk apparatus able to adjust the azimuth, radial alignment, and index of a magnetic head by adjusting a position thereof during the assembling process of a spindle motor. A positioning head movable in a direction perpendicular to a top surface of a table is provided. A plurality of positioning pins are provided on the bottom of the positioning head. Moving mechanisms are provided in the positioning head so that the bottom surface of the positioning head is movable and rotatable parallel to the top surface of the table. Each positioning pin of the positioning head is inserted into a respective positioning hole of a motor assembly so as to move the motor assembly with a movement of the positioning head so that the spindle motor of the motor assembly is at an appropriate position relative to the magnetic head of the main body of the magnetic disk apparatus.

    Abstract translation: 一种磁盘装置的组装位置调节机构,其能够通过在主轴电动机的组装过程中调节其位置来调节磁头的方位角,径向取向和折射率。 提供了可在与桌子的顶面垂直的方向上移动的定位头。 多个定位销设置在定位头的底部。 移动机构设置在定位头中,使得定位头的底面能够平行于工作台的顶面移动和旋转。 定位头的每个定位销插入到马达组件的相应定位孔中,以便随着定位头的运动而使马达组件移动,使得马达组件的主轴马达相对于磁铁位于适当的位置 磁盘装置的主体的头部。

    Optical tracking servo apparatus
    6.
    发明授权
    Optical tracking servo apparatus 失效
    光跟踪伺服装置

    公开(公告)号:US5083302A

    公开(公告)日:1992-01-21

    申请号:US247163

    申请日:1988-09-21

    CPC classification number: G11B7/0935 G11B7/0937

    Abstract: A tracking servo apparatus for performing a control so that a light beam is irradiated onto a predetermined track of an information recording surface of a disc shaped recording medium comprising an optical system for focusing the light beam on the information recording surface of the disc shaped recording medium, a holder for holding the optical system, tracking error detection circuit for detecting a tracking error of the light beam irradiated on the information recording surface with respect to the predetermined track by receiving a reflected light of the irradiated light beam that has been reflected from the information recording surface, and outputs an error signal in accordance with the tracking error, and a piezoelectric device which is connected to the holding means, and is deformed when supplied with an amplified voltage of the error signal so as to deflect the holder and thus moves the optical system so that the light beam is irradiated on to the predetermined track of the information recording surface.

    Abstract translation: 一种用于执行控制的跟踪伺服装置,使得光束照射到盘形记录介质的信息记录表面的预定轨迹上,该盘状记录介质包括用于将光束聚焦在盘形记录介质的信息记录表面上的光学系统 ,用于保持光学系统的保持器,跟踪误差检测电路,用于通过接收从所述光学系统反射的照射光束的反射光来检测照射在信息记录表面上的相对于预定轨迹的光束的跟踪误差 信息记录表面,并且根据跟踪误差输出误差信号;以及压电装置,其连接到保持装置,并在被提供有误差信号的放大电压时变形,从而使保持器偏转并因此移动 光学系统,使得光束照射到inf的预定轨道上 记录表面。

    Magneto-optic recording apparatus for recording information selectively
on both sides of the recording medium
    7.
    发明授权
    Magneto-optic recording apparatus for recording information selectively on both sides of the recording medium 失效
    用于在记录介质的两侧选择性地记录信息的磁光记录装置

    公开(公告)号:US4926403A

    公开(公告)日:1990-05-15

    申请号:US242370

    申请日:1988-09-09

    CPC classification number: G11B7/135 G11B11/10532

    Abstract: A magneto-optical recording system comprises a first optical system carried by a first focusing actuator disposed at a first side of a magneto-optical recording medium and second optical system carried by a second focusing actuator disposed at a second side of the magneto-optical recording medium. When recording an information signal on the first side of the magneto-optical recording medium by means of an optical beam focused by the first optical system, the second focusing actuator is supplied with a biasing current and produces a magnetic field for recording. When recording an information signal on the second side of the magneto-optical recording medium, the first focusing actuator is supplied with a biasing current and produces a second magnetic field for recording.

    Abstract translation: 磁光记录系统包括由设置在磁光记录介质的第一侧的第一聚焦致动器携带的第一光学系统和由设置在磁光记录器的第二侧的第二聚焦致动器承载的第二光学系统 中。 当通过由第一光学系统聚焦的光束在磁光记录介质的第一侧记录信息信号时,向第二聚焦致动器提供偏置电流并产生用于记录的磁场。 当在磁光记录介质的第二面上记录信息信号时,向第一聚焦致动器提供偏置电流并产生用于记录的第二磁场。

    Method and apparatus for formatting magnetic disks with use of host
equipment programmed for smaller capacity magnetic disks
    8.
    发明授权
    Method and apparatus for formatting magnetic disks with use of host equipment programmed for smaller capacity magnetic disks 失效
    使用为较小容量磁盘编程的主机设备格式化磁盘的方法和装置

    公开(公告)号:US4754344A

    公开(公告)日:1988-06-28

    申请号:US945290

    申请日:1986-12-22

    CPC classification number: G06F3/0607 G06F3/0638 G06F3/0676

    Abstract: A double capacity adapter circuit is connected between host equipment and one or more magnetic disk drives in order to adapt the host equipment, which has been programmed for use with relatively small capacity magnetic disks, for use with double capacity magnetic disks in the disk drives coupled thereto. As originally programmed, the host equipment formats one side of a small capacity magnetic disk with first format data in response to an index pulse from the associated disk drive, and the other side of the small capacity magnetic disk with second format data in response to another index pulse. In order to format the double capacity magnetic disks with the same program, the adapter circuit delays the index pulses by a time corresponding to half a revolution of the magnetic disk, thereby producing pseudo index pulses. The adapter circuit further enables the host equipment to cause each double capacity magnetic disk drive to write the first format data on a first half of one side of the double capacity magnetic disk in response to one true index pulse, and the second format data on a second half of the same side in response to one pseudo index pulse. Thus, for example, the complete format data that have been programmed to be written on four double sided small capacity disks can be written on two double sided double capacity disks.

    Abstract translation: 双电源适配器电路连接在主机设备和一个或多个磁盘驱动器之间,以便适配已被编程为与较小容量磁盘一起使用的主机设备,用于耦合到磁盘驱动器中的双容量磁盘 到此。 如最初编程的那样,主机设备响应于来自相关磁盘驱动器的索引脉冲而使用具有第一格式数据的小容量磁盘的一侧进行格式化,而另一侧具有响应于另一格式数据的第二格式数据的小容量磁盘 索引脉冲 为了以相同的程序格式化双容量磁盘,适配器电路将索引脉冲延迟与磁盘的半圈相对应的时间,从而产生伪索引脉冲。 适配器电路还使得主机设备能够使每个双倍容量的磁盘驱动器响应于一个真实索引脉冲将第一格式数据写入双倍容量磁盘的一侧的前半部分,并且第二格式数据在一个 响应于一个伪指数脉冲的同一侧的后半部分。 因此,例如,已编程为写入四个双面小容量磁盘的完整格式数据可以写在两个双面双容量磁盘上。

    Data transfer apparatus with a disklike record medium
    9.
    发明授权
    Data transfer apparatus with a disklike record medium 失效
    具有盘状记录介质的数据传送装置

    公开(公告)号:US4677510A

    公开(公告)日:1987-06-30

    申请号:US699085

    申请日:1985-02-07

    Abstract: An apparatus for data transfer with a magnetic disk having a metal made hub attached centrally thereto, with the hub having a first opening defined centrally therein and a second opening defined eccentrically therein. The apparatus includes a turntable mounted on a drive spindle which is engageable in the first opening in the hub of the magnetic disk loaded on the turntable. A retractable drive pin is mounted eccentrically on the turntable so as to be sprung into engagement in the second opening in the disk hub upon register therewith. In order to assure engagement of the drive pin in the second opening in the disk hub immediately upon loading of the magnetic disk on the turntable, a disk drive motor for driving the turntable via the drive spindle is connected to a supply terminal via a power control switch. When the magnetic disk is loaded on the turntable while power is being supplied from the supply terminal, a switch control circuit closes the power control switch, for causing the rotation of the turntable relative to the magnetic disk, for a preassigned length of time sufficient for the drive pin to become engaged in the second opening in the disk hub. The magnetic disk can therefore be set into rotation for immediate commencement of data transfer upon delivery of a "motor on" signal from host equipment to the power control switch.

    Abstract translation: 一种用磁盘进行数据传送的装置,该磁盘具有一个金属制轮毂,其中心地安装有金属制轮毂,该轮毂具有中心地限定在其中的第一开口和偏心地限定在其中的第二开口。 该装置包括安装在驱动主轴上的转台,该转盘可接合在装在转盘上的磁盘的轮毂中的第一开口中。 可旋转的驱动销偏心地安装在转盘上,以便与其对准时在盘毂中的第二开口中弹簧接合。 为了在将磁盘装载在转盘上时立即确保驱动销在盘毂中的第二开口中的接合,用于经由驱动主轴驱动转盘的盘驱动马达经由功率控制 开关。 当从供电端子供电时将磁盘装载在转盘上时,开关控制电路关闭电源控制开关,用于使转盘相对于磁盘转动,预先指定的时间长度足以 所述驱动销接合在所述盘毂中的所述第二开口中。 因此,可以将磁盘设置为旋转,以便在从主机设备向功率控制开关传送“电机接通”信号时立即开始数据传输。

    Data transfer apparatus for use with a flexible magnetic disk or the like
    10.
    发明授权
    Data transfer apparatus for use with a flexible magnetic disk or the like 失效
    用于柔性磁盘等的数据传送装置

    公开(公告)号:US4658307A

    公开(公告)日:1987-04-14

    申请号:US642050

    申请日:1984-08-17

    CPC classification number: G11B19/20 G11B19/00 G11B19/02 G11B19/10

    Abstract: A data transfer apparatus is disclosed as typified by a floppy disk drive which, together with one or more like devices, is daisy chained to a central processor unit via a controller. Each disk drive comprises a disk motor for driving a record disk under the control of a disk motor drive circuit, a head motor for incrementally moving a transducer head radially of the record disk under the control of a head motor drive circuit, and a read/write circuit for processing data read from, or to be written on, the record disk via the transducer head. Also included in each disk drive is a sensor control circuit associated with an optical sensor assembly for producing a DISK PRESENCE signal representative of the presence or absence of the record disk in the disk drive. In order to avoid waste of power, at least one, preferably all, of the disk motor drive circuit, head motor drive circuit, and read/write circuit is connected to an external power line via a power control switch which is closed in response to the DISK PRESENCE signal only when the record disk is loaded in the disk drive. Additional embodiments are disclosed wherein the power control switch responds not only to the DISK PRESENCE signal but also to a standard MOTOR ON signal or DRIVE SELECT signals, or to both, which are supplied from the host equipment.

    Abstract translation: 公开了一种以软盘驱动器为代表的数据传送装置,其与一个或多个相似的装置一起经由控制器被菊花链链接到中央处理器单元。 每个磁盘驱动器包括用于在盘马达驱动电路的控制下驱动记录盘的磁盘马达,用于在磁头马达驱动电路的控制下在记录盘的径向上递增地移动换能器头的磁头马达,以及读/ 写入电路,用于处理通过换能器头从记录盘读取或写入的数据。 每个磁盘驱动器中还包括与光学传感器组件相关联的传感器控制电路,用于产生表示磁盘驱动器中记录盘的存在或不存在的DISK PRESENCE信号。 为了避免浪费电力,盘式电动机驱动电路,头电动机驱动电路和读/写电路中的至少一个,优选全部是经由功率控制开关连接到外部电源线,电源控制开关响应于 只有在磁盘驱动器中装入记录磁盘时,DISK PRESENCE才会发出信号。 公开了另外的实施例,其中功率控制开关不仅响应于DISK PRESENCE信号,而且还响应于从主机设备提供的标准MOTOR ON信号或DRIVE SELECT信号或两者。

Patent Agency Ranking