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What are the methods to check when there is a problem with the welding machine? Here we will talk about the methods of comparison, replacement of components and parts, and gradual open circuit (or access), and carry out the content analysis.
1) Contrast method
Compare the test data with the drawing data and the normal parameters recorded at ordinary times to judge the fault. For welding equipment without data or usual records, you can refer to the relevant manuals or product manuals, or compare it with the intact welding equipment of the same model.
When the welding equipment components in the circuit belong to the same purpose or multiple components jointly control the same equipment, the action and data of other similar components or components of the same power supply can be used to judge the fault.
2) Set conversion element method
In order to ensure the utilization rate of welding equipment, when the fault cause of some circuits is difficult to determine or the inspection time is too long, use the same components with good performance that can be converted on the same welding equipment to test to confirm whether the fault is caused by the electrical appliance in the components.
When using the conversion element method to check, it should be noted that when the original welding equipment is removed, it should be carefully checked whether it has been damaged. Only when it is certain that the damage is caused by the welding equipment itself, can the new welding equipment be replaced, so as to prevent the new components from being damaged again.
3) Step by step open circuit (or access) method
In Shandong special welding machine equipment, when multiple branches are connected in parallel and the circuit with complex control is short circuited or grounded, there are generally obvious external manifestations, such as smoking, burning traces, etc. When the circuit inside the welding machine or with shield is short circuited and grounded, it is not easy to find other external phenomena except the fuse is blown. This situation can be checked by the step-by-step open circuit (or access) method.
① Step by step open circuit method
In case of short circuit or grounding fault that is difficult to check, the fuse melt can be replaced again, the multi branch circuit can be disconnected from the circuit step by step or emphatically, and then the power on test. If the fuse blows repeatedly, the fault is on the circuit just disconnected.
Then the branch is divided into several sections and connected to the circuit section by section. When a certain circuit is connected, the fuse blows again, and the fault lies in this circuit and some welding equipment components. This method is simple, but it is easy to completely burn the components of welding equipment that are not seriously damaged.
② Step by step access method
In case of short circuit or ground fault in the circuit, replace the new fuse, gradually or emphatically connect each branch to the power supply step by step, and retest. When receiving a certain section, the fuse blows again, and the fault lies in the circuit just connected and its package. This article describes the inspection methods and maintenance experience of welding equipment faults, including welding equipment.
When troubleshooting the welding equipment, an insulating rod can be used to forcibly press the relevant relay welding equipment, contactors and electromagnets with external force to close their normally open contacts, and then observe various phenomena in the welding equipment or mechanical part, such as the motor never turns to rotate, and the corresponding part of the equipment never moves to normal operation, etc. Come to our website for more relevant content http://www.cmeelive.com Consult.