利用840D系统的异步中断功能，可以实现机床在断刀后暂停当前的加工程序，转而执行中断程序，使机床移动到安全地方后执行手动换刀功能，当刀具更换完毕后继续执行断电程序自动返回断点继续加工。%To pause the current program after the machine tool break can be realized by using asynchronous interrupt function of 840D system. Then the interrupt program can be implemented for the machine moving to safe place to carry on manual tool changing function. The power-off procedure can be completed continually to return the breakpoint automatically for processing after the tool is changed.
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