Maintenance principle of electric mixer failure
We know that no matter what kind of equipment, after a long period of use or through our daily irregular operation and maintenance, there will be some small problems of one kind or another, some problems even directly affect our normal use, take us For the most common experimental instrument, the electric mixer , let me briefly explain how to deal with the problem when using the electric mixer.
1) Move the mouth again: When the electric mixer is faulty, do not respond to the first action, you should first ask before and after the fault occurs and the fault phenomenon. For unfamiliar equipment, you should also be familiar with the circuit principle and structural characteristics, and abide by the corresponding rules. Before disassembly, fully familiarize yourself with the function, position, connection method, and relationship with other devices around. If there is no assembly drawing, you should disassemble and draw a sketch and mark it.
2) First external and internal: First check the equipment for obvious cracks and defects, understand the maintenance history, service life, etc., and then check the machine. Before the disassembly, the surrounding fault factors should be excluded, and it can be disassembled after it is determined to be an internal fault. Otherwise, blind disassembly may worsen the equipment.
3) Electrical after the machine: Only after determining that the mechanical parts are not faulty, perform electrical inspection. When checking the circuit fault, you should use the testing instrument to find the fault location, and confirm the faultless fault after the contact, and then check the operational relationship between the line and the machine in order to avoid misjudgment.
4) Dynamic after static: When the device is not powered, judge the quality of the electrical equipment button, transformer, thermal relay and fuse to determine the fault. Power-on test, listen to its sound, measure parameters, judge faults, and finally perform maintenance. For example, when the motor is out of phase, if the three-phase voltage value cannot be determined, it should be heard and the relative ground voltage measured separately to determine which phase is defective.
5) Clean and repair first: For heavy-duty electrical equipment, first clean the buttons, wiring points and contact points, and check whether the external control keys are malfunctioning. Many faults are caused by dirty and conductive dust.
6) After the power supply device: The failure rate of the power supply part accounts for a high proportion of the entire faulty device, so it is often more effective to check the power supply first.
7) First fault after commissioning: For the electrical equipment coexisting with the commissioning and fault, the fault should be eliminated first, and then the commissioning must be carried out under the premise of the electrical line speed.
8) First general and special: Faults caused by the quality of assembly parts or other equipment failures, generally account for about 50% of common faults. The special faults of electrical equipment are mostly soft faults, which are measured and repaired by experience and instrumentation.
When the electric stirrer is damaged in the experiment, we must not be anxious. We should calmly deal with it. We will deal with it according to the 8 points we explained above. We will first judge the cause of the malfunction, and then we will be able to do more with less. In addition, we must also use it in daily use. Pay attention to the maintenance of the electric mixer to extend the life of the equipment as much as possible.
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