Direct numerical control (DNC) system including one high-speed data
processing unit for each NC machine tool
    3.
    发明授权
    Direct numerical control (DNC) system including one high-speed data processing unit for each NC machine tool 失效
    直接数控(DNC)系统,包括每台NC机床的一个高速数据处理单元

    公开(公告)号:US5388051A

    公开(公告)日:1995-02-07

    申请号:US90171

    申请日:1993-07-22

    摘要: High-speed data processing units are interposed on one-to-one basis between a host computer and each of NC units corresponding to each of NC machine tools. Each of the high-speed data processing units converts data transmitted from the host computer to each of the NC machine tools into NC data, and then inputs the data to each of the NC units, thereby making unnecessary for the NC units and the host computer to convert the data into NC data. Further, each of the high-speed data processing units temporarily stores machining data or the like transmitted from the host computer, thereby enabling each of machine tool bodies to continue its machining operation without being disturbed by the timing of data transmission.

    摘要翻译: PCT No.PCT / JP92 / 01451 Sec。 371日期:1992年7月22日 102(e)日期1993年7月22日PCT 1991年11月9日PCT PCT。 公开号WO93 / 10944 日期:1993年6月10日。高速数据处理单元在主计算机和对应于每个NC机床的每个NC单元之间以一对一的方式插入。 每个高速数据处理单元将从主计算机发送的数据转换成NC机床中的每一个为NC数据,然后将数据输入到每个NC单元,从而对于NC单元和主计算机不必要 将数据转换为NC数据。 此外,高速数据处理单元中的每一个临时存储从主计算机发送的加工数据等,从而使得各机床主体能够继续其加工操作而不受数据传输的定时的干扰。

    Method and apparatus for multiplex control of a plurality of stepper
motors
    6.
    发明授权
    Method and apparatus for multiplex control of a plurality of stepper motors 失效
    多个步进马达的多路复用控制方法和装置

    公开(公告)号:US5583410A

    公开(公告)日:1996-12-10

    申请号:US326980

    申请日:1994-10-21

    IPC分类号: G05B19/40

    摘要: A plurality of step time tables consisting of a sequence of step times defining intervals between steps and thus a velocity profile to be executed by a stepper motor are stored in a first memory. A step table defining a plurality of identical sequences of excitation pattern for driving a stepper motor is stored in a second table. Identical DMA channels output the step times to a timer and the plurality of exitation patterns to a buffer. The timer measures the duration of the step times and when each step time expires generates a trigger signal which initiates the transfer of the next step time and next excitation pattern through the respective DMA channels. The buffer includes a control register which selects one excitation pattern from the plurality of excitation patterns output from the step table to be output for control of a selected one of a plurality of motors connected to the buffer. The buffer outputs are inverted to form bipolar signals to drive current drivers in accordance with the excitation pattern. The apparatus is initialized by a data processor to select one of the plurality of excitation tables and to select one of the groups of outputs of the buffer to drive a corresponding selected motor. The DMA channel for outputting the step time table is initialized for non-repetitive operation and the DMA channel outputting the step table is initialized for cyclic operation. The direction in which the selected stepper motor is to be driven is determined by the direction in which the step table is accessed.

    摘要翻译: 由步进时间序列组成的多个步进时间表被存储在第一存储器中,所述步骤时间序列确定步骤之间的间隔,从而由步进电动机执行的速度分布。 定义用于驱动步进电机的多个相同的激励模式序列的步骤表被存储在第二表中。 相同的DMA通道将步进时间输出到定时器,并将多个退出模式输出到缓冲器。 定时器测量步进时间的持续时间,并且当每个步骤时间到期时,产生触发信号,该触发信号通过相应的DMA通道启动下一个步进时间和下一个激励模式的传送。 该缓冲器包括一个控制寄存器,该控制寄存器从输出步进表的多个激励模式中选择一个激励模式,以输出以控制连接到缓冲器的多个电动机中选定的一个。 缓冲器输出被反相以形成双极信号,以根据激励模式驱动电流驱动器。 所述装置由数据处理器初始化以选择所述多个激励表中的一个,并且选择所述缓冲器的输出组之一以驱动对应的所选择的电动机。 用于输出步进时间表的DMA通道被初始化用于非重复操作,并且输出步骤表的DMA通道被初始化用于循环操作。 所选择的步进电动机的驱动方向由步进台的访问方向决定。