1．先問后動

1. ask first and then move

對于有故障的焊接設備，如果不知道真相，不要急于動手，要了解設備的性能，并詢問操作人員故障是如何發生的，故障現象是怎樣的。對于不熟悉、復雜的焊接設備，應先熟悉設備的電路原理和結構特點，并遵守相應的規定。拆卸前，應充分熟悉各部件的功能、位置、連接方式及與周圍其他部件的關系。如果沒有焊接設備的電路圖和裝配圖，應同時進行拆卸、草圖和標記，并對拆卸的物體進行標記，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

一般應檢查焊接設備外部是否有明顯的損傷跡象，電焊機的零部件是否損壞，并了解其維修歷史、使用壽命，觀察使用現場的環境和使用情況。焊接工藝等，然后檢查電焊機。拆卸前應排除周邊故障因素，如接線、接地、配電容量、所用焊接工藝是否正確等。只有確定是電焊機內部故障后，才能進行拆卸。否則，盲目拆卸可能會使焊接設備越來越差。如電極弧焊、埋弧焊、鎢極氣體保護焊、等離子弧焊和熔融氣體保護焊機。

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．先機后電

3. machine before electricity

檢查配套焊機焊接設備的機械零部件、潤滑、氣路、水路、油路系統是否有問題。只有在確定這些系統無故障后，才能進行電氣檢查。檢查電路故障時，應使用檢測儀器找出故障部位，確認無接觸不良故障后，有針對性地檢查電路與機器的運行關系，避免誤判，如點焊、縫焊、凸焊及配套焊等設備。

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．先靜后動

4. static before dynamic

設備未通電時，判斷焊接設備按鈕、接觸器、熱斷路器元件和熔斷器的質量，從而判斷故障。通電測試，聽聲音，測量參數，判斷故障，然后進行維修。如本文介紹焊接設備故障的檢查方法和維修經驗。當電焊機輸入缺相，無法判斷三相電壓值時，應先聽聲音，分別測量各相對點的電壓，才能判斷哪一相有缺陷。

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

對于污染較重的焊接設備，清潔其按鍵、接線點、接觸點，并檢查外控按鍵是否失靈。許多故障是由污垢和導電灰塵引起的，而故障往往在清洗后。特別是在建筑工地等惡劣環境中。

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．先主后輔

6. main before auxiliary

山東自動焊接設備電源部分的故障往往占整個焊接設備故障的很大比例，所以先修理電源輸入部分往往可以事半功倍。然后檢查焊接設備的其他輔助部件，如行走、送絲等。

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.

對于調試和故障并存的焊接設備，必須在調試前排除故障。調試必須在電路完全無故障、接線正確（包括地線）的前提下進行。在條件允許的情況下，必須先對焊接設備進行絕緣電阻測試，然后再進行調試或測試。如對這一問題還存在任何疑問，都歡迎關注我們網站http://www.fangzh.cn并咨詢我們的工作人員，將竭誠為您服務。

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.fangzh.cn And consult our staff, will serve you wholeheartedly.