公开(公告)号：US5523900A

公开(公告)日：1996-06-04

申请号：US194663

申请日：1994-02-08

申请人： Tatsuhiko Kosugi ,  Shuichi Hashimoto ,  Toru Shinohara

发明人： Tatsuhiko Kosugi ,  Shuichi Hashimoto ,  Toru Shinohara

IPC分类号： G11B19/28 ,  G11B5/596 ,  G11B20/14 ,  G11B20/18 ,  G11B21/10

CPC分类号： G11B21/106 ,  G11B5/59616

摘要： A head position detecting method and apparatus for detecting a phase difference from servo data on a recording medium to detect the position of a head. This head position detecting method and apparatus detect the phase differences between the read pulse of the servo data read by the head and reference clocks, and average the phase differences to detect the head position. A training area having a timing signal recorded therein is provided before the servo data on the recording medium. A phase-lock loop circuit for generating reference clocks is synchronized with the timing signal to accurately detect the phase differences. An integrator is used to average the phase differences. This design ensures accurate detection of the head position even under fast seek. Further, a phase difference signal around a target cylinder is obtained by selecting the phase of the reference clock in accordance with the position of the target cylinder.

摘要翻译： 一种头位置检测方法和装置，用于检测与记录介质上的伺服数据的相位差以检测头的位置。 这种头部位置检测方法和装置检测由头部和参考时钟读取的伺服数据的读取脉冲之间的相位差，并且平均相位差以检测头部位置。 在记录介质上的伺服数据之前提供其中记录有定时信号的训练区域。 用于产生参考时钟的锁相环电路与定时信号同步，以准确地检测相位差。 积分器用于平均相位差。 这种设计确保即使在快速寻找下也能准确检测头部位置。 此外，通过根据目标气缸的位置选择参考时钟的相位来获得目标气缸周围的相位差信号。

公开(公告)号：US06774615B2

公开(公告)日：2004-08-10

申请号：US10056865

申请日：2002-01-25

申请人： Susumu Yoshida ,  Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

发明人： Susumu Yoshida ,  Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

IPC分类号： G06M110

CPC分类号： G11B21/10

摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.

摘要翻译： 谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。 谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且计数在应用每个正弦波振荡时再现的信息的数量不同于指示 以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

公开(公告)号：US07164261B2

公开(公告)日：2007-01-16

申请号：US10824896

申请日：2004-04-15

申请人： Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

发明人： Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

IPC分类号： G01R23/167 ,  G01R23/00

CPC分类号： G11B21/10

摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method includes the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.

摘要翻译： 谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。 谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且对施加每个正弦波振荡时再现的信息的计数不同于指示 以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

公开(公告)号：US5432659A

公开(公告)日：1995-07-11

申请号：US23806

申请日：1993-02-25

申请人： Tatsuhiko Kosugi ,  Shuichi Hashimoto

发明人： Tatsuhiko Kosugi ,  Shuichi Hashimoto

IPC分类号： G11B21/08 ,  G11B5/55 ,  G11B19/04 ,  G11B21/10 ,  G11B5/596 ,  G11B15/14

CPC分类号： G11B19/04 ,  G11B5/5534 ,  G11B5/5565

摘要： In a magnetic disk unit, a magnetic head to be activated is switched from a first magnetic head to a second magnetic head in accordance with an instruction supplied from a host system in a state where a plurality of magnetic heads are positioned at a cylinder on magnetic disks. The magnetic disk unit includes a digital servo controller for monitoring at predetermined intervals whether or not the instruction for the changing of the magnetic head is supplied from the host system, a first output circuit for outputting a first signal for a predetermined time from a time at which the digital servo controller recognizes that the instruction for the changing of the magnetic head is supplied from the host system, and a second output circuit for outputting a second signal at least from a time at which the instruction for the changing of the magnetic head is input to the magnetic disk unit to a time at which the digital servo controller recognizes that the instruction is supplied from the host system. The first signal and the second signal indicate that the magnetic disk unit is busy adjusting the plurality of magnetic heads so that an off-track error of the second magnetic head is cancelled.

摘要翻译： 在磁盘单元中，在多个磁头位于磁盘上的磁体的状态下，根据从主机系统提供的指令，将被激活的磁头从第一磁头切换到第二磁头 磁盘。 磁盘单元包括数字伺服控制器，用于以预定间隔监视是否从主机系统提供用于改变磁头的指令;第一输出电路，用于从第一输出电路输出预定时间 数字伺服控制器识别出从主机系统提供改变磁头的指令，以及至少从磁头改变指令的时刻输出第二信号的第二输出电路是 输入到磁盘单元到数字伺服控制器识别出从主机系统提供指令的时间。 第一信号和第二信号表示磁盘单元忙于调整多个磁头，从而消除第二磁头的偏离磁道误差。

公开(公告)号：US07002769B2

公开(公告)日：2006-02-21

申请号：US10920746

申请日：2004-08-18

申请人： Yoshiyuki Kagami ,  Isamu Tomita ,  Shuichi Hashimoto

发明人： Yoshiyuki Kagami ,  Isamu Tomita ,  Shuichi Hashimoto

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/5547 ,  G11B5/59633 ,  G11B21/083

摘要： There is provided a head control method controlling move of a head on a discoidal recording medium including the steps of: partitioning the discoidal recording medium which has position information recorded thereon at radially equal spacing into a plurality of zones; and demodulating the position information using a coefficient set for each of the zones.

摘要翻译： 提供了一种控制盘在盘形记录介质上的头的移动的头控制方法，包括以下步骤：将其上记录有位置信息的盘状记录介质以径向相等的间隔划分成多个区; 以及使用针对每个区域设置的系数来解调位置信息。

公开(公告)号：US5173647A

公开(公告)日：1992-12-22

申请号：US460519

申请日：1990-01-03

申请人： Shuichi Hashimoto

发明人： Shuichi Hashimoto

IPC分类号： G05D3/12 ,  G11B5/55 ,  G11B21/08 ,  H02P25/06

CPC分类号： G11B5/5547 ,  G11B21/085

摘要： A servo positioning circuit having a speed detection circuit for detecting a real speed from a position signal from a servo object; a speed error detection circuit for generating an error between a target speed and the real speed; a position error detection circuit for generating a position error signal from the position signal; a switching unit for switching connection of the servo object to the speed error detection circuit or the position error detection circuit; and a main processing unit for generating a target speed in accordance with the position signal and controlling the switching of the switching unit. When the servo object nears a target position, speed control by the speed error detection circuit switches to position control by the position error detection circuit. Further, a speed detection gain adjustment unit is included in the speed detection circuit, and the main processing unit changes the speed detection gain of an speed detection gain adjustment unit in accordance with the amount of difference.

公开(公告)号：US5097575A

公开(公告)日：1992-03-24

申请号：US491850

申请日：1990-03-12

申请人： Yukio Mitsukuchi ,  Shuichi Hashimoto ,  Shoji Momoi

发明人： Yukio Mitsukuchi ,  Shuichi Hashimoto ,  Shoji Momoi

IPC分类号： B23B3/06 ,  B23B3/16 ,  B23B3/30 ,  B23Q1/01 ,  B23Q7/04 ,  B23Q39/04 ,  G05B19/18 ,  B23B9/08

CPC分类号： G05B19/182 ,  B23B3/06 ,  B23B3/167 ,  B23B3/30 ,  B23Q1/01 ,  B23Q39/048 ,  B23Q7/04 ,  G05B2219/31407 ,  G05B2219/33263 ,  G05B2219/36338 ,  G05B2219/42104 ,  G05B2219/45125 ,  G05B2219/49143 ,  G05B2219/50001 ,  G05B2219/50003 ,  G05B2219/50004 ,  G05B2219/50219 ,  G05B2219/50235 ,  G05B2219/50382 ,  G05B2219/50387 ,  Y10T29/5114 ,  Y10T82/2502

摘要： A complex machine tool has a single frame having a chip collecting space at a center portion thereof, first and second spindle stocks on the frame, relatively free to move and drive in a Z axis direction and holding the chip collecting space therebetween, workpiece spindles on the spindle stocks free to rotate and drive and facing each other, and tool rests. The tool rests have turrets and can assume various kinds of movement. Complicated and varied types of machining can be performed combining the rotation control of the workpiece spindles and the spindle stocks.

摘要翻译： 复杂的机床具有在其中心部分具有芯片收集空间的单个框架，框架上的第一和第二主轴架，相对自由地沿Z轴方向移动和驱动，并且在其间保持芯片收集空间，工件主轴在 主轴库存自由旋转并相互驱动并相互对置，刀具支架。 刀具具有炮塔，可以承担各种运动。 可以结合工件主轴的旋转控制和主轴库存进行复杂多样的加工。

公开(公告)号：US5063454A

公开(公告)日：1991-11-05

申请号：US460657

申请日：1990-01-03

申请人： Shuichi Hashimoto

发明人： Shuichi Hashimoto

IPC分类号： G11B5/55 ,  G11B21/08

CPC分类号： G11B21/085 ,  G11B5/5547

摘要： An automatic adjustment system for a servo circuit of a magnetic disk apparatus having a magnetic head, a position signal preparing circuit, a speed control unit, and a position control unit. An automatic adjustment method includes monitoring a core width adjustment of the position signal while engaged in a uniform speed seek operation and adjusting a detection sensitivity of the position signal preparing circuit so that an angle of slope of the position signal becomes a predetermined value, measuring a forward/reverse seek operation time of the time between a forward seek operation and a reverse seek operation and adjusting a speed detecting offset of the speed control unit so that a difference between the forward seek operation time and the reverse seek operation time becomes minimal. A position control offset adjustment step is provided for measuring an integration value of the position signal during position control in a seek operation and adjusting the offset of the position control unit so that the integration value becomes minimal. The steps of counting a seek operation time and positioning adjustment of the seek operation time, adjusting a differentiation gain of the speed control unit so that the seek operation time becomes minimal, integrating the position signal, and adjusting a control current detection gain of the speed control unit so that the integration value becomes minimal, are also performed.

公开(公告)号：US20050057837A1

公开(公告)日：2005-03-17

申请号：US10784666

申请日：2004-02-23

申请人： Kohei Takamatsu ,  Yoshiyuki Kagami ,  Shuichi Hashimoto

发明人： Kohei Takamatsu ,  Yoshiyuki Kagami ,  Shuichi Hashimoto

IPC分类号： G11B21/10 ,  G11B5/00 ,  G11B5/008 ,  G11B5/02 ,  G11B5/024 ,  G11B5/10 ,  G11B5/48 ,  G11B5/596 ,  G11B5/09

CPC分类号： G11B5/10 ,  G11B5/00813 ,  G11B5/02 ,  G11B5/024 ,  G11B5/4893 ,  G11B5/59627 ,  G11B2005/001

摘要： An eccentricity correction data recording method, a disk-shaped recording medium, a head position control method and an information recording and reproducing apparatus are disclosed for effective eccentricity correction on cylinders of a disk-shaped recording medium. The eccentricity correction data recording method is for position control over a recording and reproducing head on a disk-shaped recording medium having at least one user data recording area to record user data, the method including the step of recording the eccentricity correction data in a user data recording area.

摘要翻译： 公开了一种偏心校正数据记录方法，盘形记录介质，磁头位置控制方法和信息记录和再现装置，用于在盘形记录介质的气缸上进行有效的偏心校正。 偏心校正数据记录方法是用于在具有至少一个用户数据记录区域的盘形记录介质上对记录和再现头进行位置控制以记录用户数据，该方法包括在用户中记录偏心校正数据的步骤 数据记录区。

公开(公告)号：US5844744A

公开(公告)日：1998-12-01

申请号：US820637

申请日：1992-01-24

申请人： Nobuyuki Suzuki ,  Shuichi Hashimoto ,  Toshio Negoro

发明人： Nobuyuki Suzuki ,  Shuichi Hashimoto ,  Toshio Negoro

IPC分类号： G11B5/55 ,  G11B21/08 ,  G11B21/18

CPC分类号： G11B5/553 ,  G11B21/083 ,  G11B21/085 ,  G11B21/18

摘要： A head positioning apparatus and method for a disk drive system. During each computing time of a plurality of sequential computing times: (a) a position of a servo head on a disk is computed, (b) an actual position of the servo head in the present computing time is computed, based on the computed position of the servo head and an estimated position of the servo head computed in the preceding computing time, (c) a moving distance of the servo head is computed, based on the actual positions of the servo head computed in the present computing time and in the preceding computing time, (d) an estimated position of the servo head in the present computing time, indicating an estimated position reached by the servo head at the succeeding computing time, is computed from the actual position of the servo head computed in the present computing time to the moving distance of the servo head, (e) a moving velocity of the servo head is computed based on the actual position of the servo head computed in the present computing time and the actual position of the servo head computed in the preceding computing time, (f) a remaining number of tracks up to a target track is computed, based on the actual position of the servo head computed in the present computing time, and (g) an object velocity of the servo head is obtained, based on the remaining number of tracks.

摘要翻译： PCT No.PCT / JP91 / 00870 Sec。 371日期：1993年10月18日 102（e）日期1993年10月18日PCT提交1990年6月27日PCT公布。 出版物WO92 / 11636 日本1992年7月9日磁头驱动系统的头部定位装置及方法。 在多个顺序计算时间的每个计算时间期间：（a）计算一个伺服磁头在磁盘上的位置，（b）基于计算出的位置计算当前计算时间内的伺服磁头的实际位置 伺服头的计算位置和前一计算时间中计算的伺服头的估计位置，（c）基于当前计算时间内计算出的伺服头的实际位置，计算伺服头的移动距离， （d）当前计算时间内的伺服头的估计位置，表示在随后的计算时刻由伺服头达到的估计位置，根据本计算中计算的伺服头的实际位置计算 时间到伺服头的移动距离，（e）伺服头的移动速度是根据在当前计算时间内计算的伺服头的实际位置和伺服头的实际位置来计算的 （f）基于在当前计算时间中计算的伺服头的实际位置，计算直到目标轨道的剩余轨道数，以及（g）目标轨迹的目标速度， 基于剩余的轨道数获得伺服头。