Computer board knowledge of excavator
Komatsu pump controller and monitoring panel is the core control unit in the whole excavator control system. The degree of automation is quite high. Komatsu has been using analog circuits and large scale integrated circuits in its pump control system since the -3 system. At that time, the LEDs were used to display the fault and the related working condition information. The staff read the switch state of the light emitting diode and checked the fault table to know the state of the machine. Over the same period as the -1-2 Caterpillar 200B Hitachi -1-2 Kobelco have also used a fairly technical. The 90s is a time of great industrial development, the wide application of Komatsu step motor technology and speed acquisition technology applied to the excavator industry, greatly enhance the perfect matching of engine and hydraulic system, greatly improve the degree of automation. Hyundai also used the technology at the same time.
At present, Komatsu's eighth generation model adopts the high pressure common rail diesel engine which meets the emission standard. The control unit for the German horse brand and Motorola two companies are the products in the United States and Europe have been used for a long time is a very mature product, Komatsu advantage of the engine ECM many parameters and settings seamlessly embedded into the control panel, unless some high-end adapter settings to use ECM enter the authentication set within ECM. Some simple settings can be directly through the control panel to direct the transfer form commands, such as changing the amount of oil cylinder is off, like other brands need special software and adapter provided by the engine manufacturer can corresponding to the operation, it is an independent control unit is the only public basic parameters and fault codes some even have fault code and machine manufacturers do not need consistent comparison and translation. The advanced instructions and parameters are not disclosed or supplied to the whole machine manufacturer.
Komatsu hybrid technology in the automotive field, the engine and hydraulic pump connection configuration of the generator through the engine to rotate and generate electrical energy stored in the accumulator in principle by inverter rotary mechanism, when rotation through the electric motor driven from the engine and save energy.
At the same time, in the monitoring system has also launched a digital display technology Komatsu fifth generation models, shortly after the introduction of the sixth generation of LCD technology, to the current CSNT LCD pseudo color display technology of the seventh generation. The eighth generation model and the most advanced SI TFT LCD Zhencai technology. Greatly improving the interface and man-machine dialogue of comfort, at the same time Komatsu purchase in the raw material is at the cost, in order to pursue the stability of the product they use their best is also a world-class KYOCERA, the company's products optrex etc..
From around 2003, some digging machine driver in the boss forced stingy stole the computer board, in order to make a profit, then there are a few number of "professionals" in the industry, resulting in a large number of computer plate is missing, and the original supply, they continue to steal lead to a domino effect. At the same time, some electronic professionals began to study computer board and board machine, successful imitation of some products to fill the gaps in the market, but in the technology, electronic components, LCD, it is difficult to guarantee the quality of the products of these reasons, after several years of experience are part of the product quality has been well reflected, the price is relatively cheap. But there's another problem. Things are cheap and nobody steals it. The professionals also follow the market and steal the newest and most valuable ones. It also leads to a large number of missing, but because of intellectual property rights, brand, technology, and many other reasons, domestic and other enterprises are often unable to keep up with.
So often some new models on the market of fake goods is not to buy, so in addition to second-hand on only a few Honai in repair, repair these often are not a big problem, but there is definitely a problem. The so-called OEM can flow to the market is very small, only the professional trading company or some big companies have professional accessories supply, the quality of these products with the original quality of the same, only slightly different packaging or labeling. These products are economical and affordable, but very few.
Customers in the loss or damage of computer board is certainly preferred host manufacturers, but because of the price and delivery time and other reasons generally difficult to allow customers to accept, such as all joint venture manufacturers on the computer board of this piece is only to ensure that the original quality, the other does not guarantee. Because the electronic components after power failure occurs, it is difficult to obtain evidence. If the customer can find supporting manufacturers that will be much better, domestic imitation has its advantages, the price is relatively cheap, maintenance and installation of connector can provide ancillary services, and there is a certain warranty period. Second hand parts and refurbished accessories suggest that customers do not purchase, there is risk. Therefore, we suggest that the host manufacturer to reduce the price of the product, accessories Service up, so that it will not be vicious circle.
The computer board is digging little damage during peacetime use, he does not belong to the vulnerable parts, are generally man-made or force majeure caused. We have a general statistical damage generator fault leads to high voltage, battery, battery fault, increased electricity load private pull random access, short circuit ground wire harness aging, external high pressure to dig into the cable, wire bonding is not correct, maintenance is not according to the operation code, do not turn off the power and disconnect the negative pole on the hot swap ECM the computer board, etc.. The natural causes are burning, flooding, lightning, accident overturned, ultrasonic damage, such as liquid crystal damage after blasting and so on.
The root cause of computer board theft is. The panels are priced too high is not reasonable, for example, the probability of digging machine independent brand computer board stolen little, what reason is cheap, those who have made the computer board old models now stolen less what reason? It's cheap, too. It's not worth the risk.
