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1. 发明授权

US3633087A Electronic tracer method and apparatus for monitoring the path of a numerically controlled machine 失效
标题翻译：用于监控数控机器路径的电子跟踪器方法和装置
公开(公告)号：US3633087A
公开(公告)日：1972-01-04
申请号：US3633087D
申请日：1970-03-16
申请人： ROHR CORP
发明人： VAWTER VERNE E , WILSON WILLIAM D , LEAKE KYLE W
IPC分类号： G05B19/4068 , G05B23/02 , G05B19/22
CPC分类号： G05B19/4068 , G05B2219/35353 , G05B2219/41363
摘要： Machine path pulses produced by X, Y and Z slide movements of a numerically controlled machine are compared with pulses derived from the programmed data independently of those which produced the slide movements on command, extra temporary storage being employed to delay the production of the tracer path pulses to compensate for the machine position lag behind the electronic position produced by the command generator. Gated X, Y and Z updown counters, each counting up on its machine path pulses and down on its tracer path pulses, tend to establish a null condition within up and down count limits to either side of an initially set value. A gating network generates an off null signal when any of the counters exceeds the null limits. Clock signals modulated by the off null signal change the rate of generation of the tracer path pulses to thereby restore the counters to the null condition. When the off null signal persists longer than a predetermined interval, an error signal is produced to stop the machine operation.
摘要翻译：将由数控机床的X，Y和Z滑动运动产生的机械路径脉冲与从编程数据导出的脉冲进行比较，独立于产生指令上的滑动运动的脉冲脉冲，额外的临时存储被用于延迟跟踪器路径的产生脉冲以补偿由指令发生器产生的电子位置落后的机器位置。门控X，Y和Z上升计数器，其每个在其机器路径脉冲上向上计数，并且在跟踪器路径脉冲上向下计数，倾向于在初始设置值的任一侧的上下计数限度内建立空值条件。当任何计数器超过空值限制时，选通网络会生成一个关闭空信号。由关闭空信号调制的时钟信号改变示踪路径脉冲的产生速率，从而将计数器恢复到空状态。当关闭空信号持续超过预定间隔时，产生错误信号以停止机器操作。

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