1．先问后动

1. ask first and then move

对于有故障的焊接设备，如果不知道真相，不要急于动手，要了解设备的性能，并询问操作人员故障是如何发生的，故障现象是怎样的。对于不熟悉、复杂的焊接设备，应先熟悉设备的电路原理和结构特点，并遵守相应的规定。拆卸前，应充分熟悉各部件的功能、位置、连接方式及与周围其他部件的关系。如果没有焊接设备的电路图和装配图，应同时进行拆卸、草图和标记，并对拆卸的物体进行标记，并注意。

For faulty welding equipment, if you don't know the truth, don't rush to start. You should understand the performance of the equipment and ask the operator how the fault occurs and what the fault phenomenon is. For unfamiliar and complex welding equipment, first be familiar with the circuit principle and structural characteristics of the equipment, and comply with the corresponding regulations. Before disassembly, be fully familiar with the function, position, connection mode of each component and the relationship with other surrounding components. If there is no circuit diagram and assembly drawing of welding equipment, disassembly, sketch and marking shall be carried out at the same time, and the disassembled objects shall be marked, and attention shall be paid to safety.

2．先外后里

2. from outside to inside

一般应检查焊接设备外部是否有明显的损伤迹象，电焊机的零部件是否损坏，并了解其维修历史、使用寿命，观察使用现场的环境和使用情况。焊接工艺等，然后检查电焊机。拆卸前应排除周边故障因素，如接线、接地、配电容量、所用焊接工艺是否正确等。只有确定是电焊机内部故障后，才能进行拆卸。否则，盲目拆卸可能会使焊接设备越来越差。如电极弧焊、埋弧焊、钨极气体保护焊、等离子弧焊和熔融气体保护焊机。

Generally, check whether there are obvious signs of damage on the outside of the welding equipment, whether the parts of the electric welding machine are damaged, understand its maintenance history and service life, and observe the environment and service conditions on the use site. Welding process, etc., and then check the electric welding machine. Before disassembly, eliminate surrounding fault factors, such as wiring, grounding, power distribution capacity, whether the welding process used is correct, etc. Only after the internal fault of the electric welding machine is confirmed, can it be removed. Otherwise, blind disassembly may make the welding equipment worse and worse. Such as electrode arc welding, submerged arc welding, tungsten gas shielded welding, plasma arc welding and molten gas shielded welding.

3．先机后电

3. machine before electricity

检查配套焊机焊接设备的机械零部件、润滑、气路、水路、油路系统是否有问题。只有在确定这些系统无故障后，才能进行电气检查。检查电路故障时，应使用检测仪器找出故障部位，确认无接触不良故障后，有针对性地检查电路与机器的运行关系，避免误判，如点焊、缝焊、凸焊及配套焊等设备。

Check whether there is any problem in the mechanical parts, lubrication, air circuit, water circuit and oil circuit system of the supporting welding machine and welding equipment. The electrical check can only be carried out after it is confirmed that these systems are free of faults. When checking the circuit fault, use the detection instrument to find out the fault position. After confirming that there is no poor contact fault, check the operation relationship between the circuit and the machine to avoid misjudgment, such as spot welding, seam welding, projection welding and supporting welding equipment.

4．先静后动

4. static before dynamic

设备未通电时，判断焊接设备按钮、接触器、热断路器元件和熔断器的质量，从而判断故障。通电测试，听声音，测量参数，判断故障，然后进行维修。如本文介绍焊接设备故障的检查方法和维修经验。当电焊机输入缺相，无法判断三相电压值时，应先听声音，分别测量各相对点的电压，才能判断哪一相有缺陷。

When the equipment is not powered on, judge the quality of buttons, contactors, thermal circuit breaker elements and fuses of welding equipment, so as to judge the fault. Power on test, listen to the sound, measure the parameters, judge the fault, and then carry out maintenance. For example, this article introduces the inspection methods and maintenance experience of welding equipment faults. When the input phase of the electric welding machine is missing and the three-phase voltage value cannot be judged, the sound shall be heard first, and the voltage of each relative point shall be measured respectively, so as to judge which phase is defective.

5．先清后修

5. cleaning before repair

对于污染较重的焊接设备，清洁其按键、接线点、接触点，并检查外控按键是否失灵。许多故障是由污垢和导电灰尘引起的，而故障往往在清洗后。特别是在建筑工地等恶劣环境中。

For heavily polluted welding equipment, clean its keys, wiring points and contact points, and check whether the external control keys fail. Many faults are caused by dirt and conductive dust, and faults are often eliminated after cleaning. Especially in harsh environments such as construction sites.

6．先主后辅

6. main before auxiliary

山东自动焊接设备电源部分的故障往往占整个焊接设备故障的很大比例，所以先修理电源输入部分往往可以事半功倍。然后检查焊接设备的其他辅助部件，如行走、送丝等。

The power failure of Shandong automatic welding equipment often accounts for a large proportion of the whole welding equipment failure, so repairing the power input part first can often get twice the result with half the effort. Then check other auxiliary parts of the welding equipment, such as walking, wire feeding, etc.

对于调试和故障并存的焊接设备，必须在调试前排除故障。调试必须在电路完全无故障、接线正确（包括地线）的前提下进行。在条件允许的情况下，必须先对焊接设备进行绝缘电阻测试，然后再进行调试或测试。如对这一问题还存在任何疑问，都欢迎关注我们网站http://www.tayfsk.com并咨询我们的工作人员，将竭诚为您服务。

For welding equipment with both commissioning and fault, the fault must be eliminated before commissioning. The commissioning must be carried out on the premise that the circuit is completely fault free and the wiring is correct (including the ground wire). If conditions permit, the welding equipment must be tested for insulation resistance before commissioning or testing. If you have any questions about this issue, you are welcome to follow our website http://www.tayfsk.com And consult our staff, will serve you wholeheartedly.