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杭州无线电专用设备一厂生产的SCX-73型线切割机床,开机后,光电输入机始终开启着,这样势必影响长钨丝灯泡及伺服电动机的寿命。针对这个问题,笔者设计了一个电路来控制光电输入机的启闭,让它在送数时开启,送数结束后再关闭,就避免了上述的缺点。电路原理及逻辑见附图。设计是依据这样的理由:由于光电输入机有热及机械的惯性,送数不能在刚开启光电输入机的同时进行,必须预先使光电输入机开启几秒,
SCX-73 wire-cutting machine produced by Hangzhou Radio Equipment Factory is always on after the power is turned on, which will inevitably affect the life of the long tungsten filament bulb and servo motor. In response to this problem, I designed a circuit to control the opening and closing of the optical input machine, let it open when the number of send, send the number of the end and then closed, to avoid the above shortcomings. See circuit diagram and logic. The design is based on the following reasons: Due to thermal and mechanical inertia of the optical input machine, the number of sending can not be carried out at the same time that the optical input machine is turned on, the optical input machine must be turned on in advance for a few seconds,