The excavator arm lengthens to analyze the cause of damage to excavator parts. In many cases, you may hear the owner of the excavator say that one of the parts burned out. At this time, we must check whether it is caused by human beings. According to the specific situation, we are trying to find out the reasons.
Firstly, bad contact of battery wire pile head, oxidation of contact surface, CPU of computer board and damage probability of instrument increase greatly. Electrical appliances used at home with the same principle, if fuse box contact is not good or switch contact is bad, the light bulb is always light and dark change easily burned out. The mechanical electrical system is the same as household appliances, so we must pay attention to the reliability of the contact of the battery pile head.
Secondly, the connection of battery wires is a very serious mistake. The damage rate is very high. It burns fuses lightly. What is heavy is the power circuit of burning computers and CPU board tools. Some diode strings and negative poles of power supply are connected. Basically, these diodes will also burn and the fuse must not escape.
3. Throttle motor malfunction or abnormal operation, throttle motor driver uses DC motor and stepper motor. If the motor is overheated and short-circuited, and part of the throttle control circuit, the computer is easy to burn out and failure is inevitable. Drivers usually pay more attention to the assembly of throttle motor to keep it clean and the failure probability will be reduced. When the excavator is electrified, there is no throttle motor connecting rod in the excavator. Fala moves. If you try to move the throttle lever, you may burn the excavator's computer board.
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Four drivers, cold start difficult, plus battery 36 V power supply startup machine, the operation method is commonly used by the old driver, if there is a new aircraft on the computer control panel may be wrong machine operation, easy to burn power relays, safety relays, when the two relays burning caused by the internal coil short circuit, the driver and instrument on the computer board also burned out.
5. Drivers, computer boards or instruments enter the water. This phenomenon is very common and destructive. Especially when the water inside the computer board, mainly the copper foil burning of the internal circuit board, can not be repaired and oxidized. In one case, a computer board line is inserted into the water. The possible failure pin oxidation is the computer board. The phenomenon is poor contact between the pin and the solder joint of the circuit board.
6. Maintenance errors. Many mechanical maintenance owners, because they do not know the circuit, suspect that some electronic parts work abnormally, will think that using short-circuit method to test the circuit is normal. This method of short-circuit operation is the most recommended method of circuit maintenance, and the damage is very great.