数控车床由于采用计算机控制和机电一体化技术,结构复杂。从而使数控车床的故障也变得复杂,故障率也较高。本文针对数控车床双报警故障,采用分别绘制各个单报警故障的逻辑框图,形象化显示控制环中的故障点,通过示意图的形式理顺各控制环节的逻辑关系,找出属于两个逻辑环中的相同元器件,这个元器件本身或保证其工作的其它元器件就是双报警故障的共同根源。 CNC lathes due to the use of computer control and mechatronics, complex structure. So that the CNC lathe fault has become complicated, the failure rate is higher. In this paper, aiming at double alarm fault of CNC lathe, the logic diagram of each single alarm fault is plotted, the fault points in the control loop are visualized, and the logical relationship of each control loop is stratified through the schematic diagram to find the two logic loops Of the same components, the component itself or other components to ensure its work is the common root cause of double alarm failure.