公开(公告)号：US4551664A

公开(公告)日：1985-11-05

申请号：US536553

申请日：1983-09-27

申请人： Harvey C. Wong ,  Frank W. Lin

发明人： Harvey C. Wong ,  Frank W. Lin

IPC分类号： B41J1/30 ,  B41J7/34 ,  B41J29/38 ,  G05B19/39 ,  G05D3/12 ,  G05B11/18

CPC分类号： G05B19/39 ,  G05B2219/41021 ,  G05B2219/42104 ,  G05B2219/45187

摘要： In a rotary printer control system, a dual mode servo for controlling the velocity and position of a rotary print wheel and a print wheel carriage is normally operated at a relatively high gain value. When the servo is switched from the velocity mode to the position mode, the length of time the servo remains in the position mode is monitored and, if this exceeds a predetermined maximum time period, the gain of the servo loop is switched to a relatively low value in order to reduce oscillations of the print wheel or carriage about the HOME position. The gain reduction is accomplished by inserting a supplemental R-C network in parallel with the high gain R-C network, and the range or ratios of the relatively high gain to the relatively low gain values is from about 10 to about 30.

摘要翻译： 在旋转打印机控制系统中，用于控制旋转打印轮和打印轮滑架的速度和位置的双模式伺服器通常以相对较高的增益值运行。 当伺服从速度模式切换到位置模式时，监视伺服保持在位置模式的时间长度，如果超过预定的最大时间周期，则将伺服环路的增益切换到相对较低的位置 值以减少打印轮或托架在HOME位置上的振荡。 通过将补充R-C网络与高增益R-C网络并行地插入来实现增益减小，并且相对较高增益与较低增益值的范围或比率为约10至约30。

公开(公告)号：US5036313A

公开(公告)日：1991-07-30

申请号：US398793

申请日：1989-08-25

申请人： Frank W. Lin ,  Harvey C. Wong ,  Sam K. Lim

发明人： Frank W. Lin ,  Harvey C. Wong ,  Sam K. Lim

IPC分类号： G06F1/16

CPC分类号： G06F1/1616 ,  G06F1/1656 ,  G06F1/1658 ,  Y10S345/905

摘要： An improved assembly design for a portable computer. A housing has a base member with a plurality of edge guides located along the side portions and a plurality of connector sockets arranged along the inner front portion. A matching circuit board has a plurality of forwardly extending plug margins which mate with the sockets when the board is fully installed in the edge guides. The board carries the main computer system electronic components and a rigid disk memory module. The keyboard assembly, floppy disk memory and power supply are all mounted to the under surface of the housing cover member, and the display panel is mounted to the top of the cover. The design enables quick assembly of the computer, and quick removal of the circuit board for repair.

摘要翻译： 改进了便携式计算机的组装设计。 壳体具有基部构件，其具有沿着侧部设置的多个边缘引导件和沿着内部前部部分布置的多个连接器插口。 匹配电路板具有多个向前延伸的插头边缘，当板完全安装在边缘引导件中时，它们与插座配合。 主板上装有主机系统的电子元件和刚性盘存储器模块。 键盘组件，软盘存储器和电源都安装在壳体盖构件的下表面上，并且显示面板安装到盖的顶部。 该设计可以快速组装计算机，并快速拆卸电路板进行维修。

公开(公告)号：US4585997A

公开(公告)日：1986-04-29

申请号：US559526

申请日：1983-12-08

申请人： Frank W. Lin

发明人： Frank W. Lin

IPC分类号： G05B19/21 ,  H03K5/1252 ,  H03M13/00

CPC分类号： G05B19/21 ,  H03K5/1252 ,  G05B2219/41122

摘要： A noise blanking circuit for eliminating evidence of noise present in an incoming alternating electrical control signal, such as a shaft encoder or tachometer signal in a servo control circuit, is disclosed. The alternating electrical signal is input to a first input of a shift register having a plurality of outputs. Clock signals having a preselected frequency are input to a second input of the shift register for digitally sampling the alternating electrical signal at the times of occurrence of the clock signals so as to produce digital samples shiftably stored in respective storage locations of the shift register, which are connected to the plurality of outputs of the shift register. The digital samples appearing at predetermined ones of the plurality of outputs of the shift register are input to a logic circuit for producing a first logic state (low state) as an output signal, when a first logic state appears at the predetermined ones of the plurality of outputs of the shift register, and a second logic state (high state) as the output signal, when a second logic state appears at the predetermined ones of the plurality of outputs of the shift register. The selectivity of the noise blanking circuit can be selected by adjusting the clock signal frequency and/or the number of storage locations included in the shift register and/or changing the predetermined ones of the plurality of outputs of the shift register which are input to the logic circuit. Other features are also disclosed.

摘要翻译： 公开了一种用于消除输入的交流电控制信号中存在噪声的噪声消隐电路，例如伺服控制电路中的轴编码器或转速计信号。 交流电信号输入到具有多个输出的移位寄存器的第一输入端。 具有预选频率的时钟信号被输入到移位寄存器的第二输入端，用于在出现时钟信号时对交变电信号进行数字采样，以产生可移位地存储在移位寄存器的相应存储位置中的数字采样， 连接到移位寄存器的多个输出端。 出现在移位寄存器的多个输出中的预定值的数字样本被输入到用于产生作为输出信号的第一逻辑状态（低状态）的逻辑电路，当第一逻辑状态出现在多个 当第二逻辑状态出现在移位寄存器的多个输出中的预定的输出端时，移位寄存器的输出和第二逻辑状态（高状态）作为输出信号。 噪声消隐电路的选择性可以通过调整时钟信号频率和/或包括在移位寄存器中的存储位置的数量和/或改变被输入到移位寄存器的移位寄存器的多个输出中的预定的输出来选择 逻辑电路。 还公开了其他特征。

公开(公告)号：US4517503A

公开(公告)日：1985-05-14

申请号：US536915

申请日：1983-09-27

申请人： Frank W. Lin ,  Suhdok D. Moon ,  Tri S. Van ,  Max I. Anzai

发明人： Frank W. Lin ,  Suhdok D. Moon ,  Tri S. Van ,  Max I. Anzai

IPC分类号： B41J1/30 ,  B41J1/24 ,  B41J7/34 ,  B41J19/00 ,  B41J19/20 ,  B41J29/38 ,  G05B19/416 ,  G05D3/12 ,  H02P8/00 ,  G05B13/00

CPC分类号： B41J19/202 ,  B41J1/24 ,  G05B19/416 ,  G05B2219/41119 ,  G05B2219/42171 ,  G05B2219/45187

摘要： A speed normalization circuit for eliminating the need to fine tune a servomechanism, such as a daisy wheel printer, after manufacture, for example, in order to compensate for speed variations caused by tolerance variations throughout the manufacturing process and evidenced by variations in the actual print wheel speed and the actual carriage speed, is disclosed. In operation, when a restore sequence is called for (power up, remote restore, cover open/resume, check/resume), the carriage is restored to the leftmost home position and is then stepped three times by an identical amount (twelve increments, 1/120 of an inch per increment). The average value of the actual carriage speed for these three movements is determined and a compensation value is selected. If the carriage speed is too slow, the nominal speed value stored in a read only memory look-up table is incremented by a fixed value (i.e., plus one, two, or three units); if the speed is too fast, the nominal speed value is decremented by a fixed value (i.e., minus one, two, or three units). The compensation value is added to the nominal speed value during subsequent actual operation of the servomechanism. For the print wheel, there are two programmed movements upon restore, namely, one half rotation in each direction (one forward, one reverse) for a total of ninety-six increments per movement. The speed compensation value is calculated in the same manner. Other features are also disclosed.

摘要翻译： 一种速度归一化电路，用于在制造之后不需要微调伺服机构，例如菊花轮打印机，以便补偿整个制造过程中由公差变化引起的速度变化，并由实际打印中的变化证明 车轮速度和实际车速。 在操作中，当需要恢复序列（上电，远程恢复，覆盖打开/恢复，检查/恢复）时，托架将恢复到最左边的原始位置，然后以相同的量进行三次步进（十二个增量， 每增加1/120英寸）。 确定这三个运动的实际托架速度的平均值，并选择补偿值。 如果托架速度太慢，则存储在只读存储器查找表中的标称速度值增加固定值（即，加上一个，两个或三个单位）; 如果速度太快，则标称速度值递减一个固定值（即减去一个，两个或三个单位）。 补偿值在伺服机构的后续实际运行过程中被加到标称速度值上。 对于打印轮，在恢复时有两个编程的移动，即每个方向（一个向前，一个反向）进行一个半旋转，每次移动总共有九十六个增量。 速度补偿值以相同的方式计算。 还公开了其他特征。

公开(公告)号：US4219766A

公开(公告)日：1980-08-26

申请号：US890051

申请日：1978-03-27

申请人： Frank W. Lin

发明人： Frank W. Lin

IPC分类号： B41J1/24 ,  G05B19/39 ,  G05B11/18

CPC分类号： B41J1/24 ,  G05B19/39 ,  G05B2219/42114

摘要： A dual mode servo-system providing improved motion characteristics and improved noise immunity. A relatively movable member is driven by control signals derived from actual velocity feedback signals during coarse mode operation. At the beginning of fine mode operation the actual velocity signal is sampled and used to generate a synthetic velocity signal used to control motion of the member during final deceleration, along with an actual position feedback signal, the synthetic velocity signal having a decreasing magnitude tailored to a particular application. At a predetermined maximum time period, after detent of the member, a time out circuit re-inserts the actual velocity feedback signal.Control signals for the driven member are also derived from the actual motor current by integrating the motor current, the integrated current signals being used to control motion of the member during coarse mode operation only. During fine mode operation, the member is controlled by an actual position feedback signal and an actual velocity signal derived from the position signal.

摘要翻译： 双模伺服系统提供改善的运动特性和改善的抗噪声能力。 在粗略模式操作期间，通过来自实际速度反馈信号的控制信号来驱动相对可移动的构件。 在精细模式操作开始时，实际速度信号被采样并用于产生用于在最终减速期间控制构件的运动的合成速度信号以及实际位置反馈信号，合成速度信号具有减小的量值 一个特定的应用。 在预定的最大时间段内，在构件制动之后，超时电路重新插入实际的速度反馈信号。 驱动构件的控制信号也通过积分电动机电流从实际电动机电流得出，积分电流信号仅用于在粗略模式操作期间控制构件的运动。 在精细模式操作期间，构件由实际位置反馈信号和从位置信号导出的实际速度信号控制。

公开(公告)号：US4315198A

公开(公告)日：1982-02-09

申请号：US91931

申请日：1979-11-07

申请人： Frank W. Lin ,  Mei S. Sze

发明人： Frank W. Lin ,  Mei S. Sze

IPC分类号： G05D3/12 ,  G01D5/245 ,  G01P3/48 ,  G01P3/481 ,  G05B19/39 ,  G05B11/18

CPC分类号： G05B19/39 ,  G05B2219/34215 ,  G05B2219/42114

摘要： A digital servo system adapted for use in a dual mode coarse-fine servo system to control a movable member from a starting position to an at rest destination position. The digital servo generates a pulse train in response to varying space phase cyclic analog position signal A from an encoder coupled to the movable member. Each cycle of an analog position signal represents a small incremental amount of movement by the movable member. The pulse train provides a change in its state in time with the varying position signals. In the preferred embodiment, eight changes occur per cycle. The pulse train is integrated to provide a velocity signal which is compared with a command velocity signal.

摘要翻译： 一种适用于双模粗细伺服系统的数字伺服系统，用于控制从起始位置到静止目标位置的可动构件。 数字伺服响应于来自耦合到可动构件的编码器的变化的空间相位循环模拟位置信号A产生脉冲串。 模拟位置信号的每个周期表示可移动部件的小的增量移动量。 脉冲串随着变化的位置信号在时间上改变其状态。 在优选实施例中，每个周期发生八次改变。 脉冲串被集成以提供与指令速度信号相比较的速度信号。