The solution to the CNC engraving and milling machine malfunction

(1) to find out fault phenomenon when CNC engraving and milling machine failure, the first thing to find out the fault phenomena, to operating personnel understand the circumstances of the first failure, where possible, to observe the failure process, observe the fault is in what circumstances happen, happened, cause what kind of consequences. Only learned firsthand, help the excluding of fault, the fault process clear, half will solve problem. Figure out the failure phenomenon, and then according to the working principle of the machine tool and numerical control system can quickly identify the problem and troubleshooting, engraving and milling machine returned to normal use. Now growing since the diagnosis ability of nc system, most of the engraving and milling machine to be able to diagnose faults of CNC system, and take the corresponding measures, such as downtime, usually produce the alarm display. When CNC engraving and milling machine failure, sometimes displayed on the monitor alarm information, and sometimes in the numerical control device, PLC device and driving device alarm indication. Then according to the manual for these alarm information is analyzed, and some can be directly according to the alarm information to confirm the cause of the problem, as long as you understand the content of the alarm information, the problems can be ruled out CNC engraving and milling machine. (2) to take advantage of the numerical control system of PLC state display many numerical control system has function of PLC status display, use the function of PLC input and output can be shown, the instantaneous state of the timer, counter, etc, and content. According to the working principle of machine tool and machine tool manufacturers to provide electrical schematic diagram, by monitoring the corresponding state, some faults can be diagnosed. (3) to take advantage of the machine tool manufacturers to provide the PLC ladder diagram of the most faults of CNC engraving and milling machine by PLC device detected, PLC to detect the fault mechanism is compiled by running the machine tool manufacturers for a particular machine PLC ladder diagram ( The program) , according to a variety of input, output, state logic, if found the problem, generate alarm and alarm information generated on screen. So for some PLC fault alarm, or some no warning of the failure, can be based on the analysis of PLC ladder diagram of fault diagnosis, use the ladder diagram of the NC system display or closed to programmer online tracking the operation of the ladder diagram, can improve the speed and accuracy in the diagnosis of fault. (4) exchange method is used to accurately locate fault point for some of the involved control system failure, sometimes it is not easy to confirm which part has a problem, to ensure no further damage cases, by substituting the spare control panel control panel, in question is a effective way to accurately locate fault point, sometimes with other machine tools on the control panel of the same kind of control system swap will be more rapid diagnosis fault ( At this time to ensure that will not damage to the good boards) 。