Things to pay attention to in the maintenance of CNC machine tools - News - Global IC Trade Starts Here Free Products

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(1) When taking out a certain circuit board from the whole CNC machine, pay attention to record its corresponding position, the connected cable number. For the fixed installation of the circuit board, the corresponding crimping parts and screws should also be removed before and after. Make a record. The pressed parts and screws should be placed in a special box to avoid loss. After assembly, all the contents of the box should be used, otherwise the assembly is incomplete.

(2) The soldering iron should be placed in front of the hand, away from the maintenance circuit board. The soldering iron tip should be properly trimmed to accommodate the soldering of the integrated circuit and to avoid damage to other components during soldering.

(3) When measuring the resistance between the lines, the power should be cut off. When measuring the resistance value, the red and black test leads should be interchanged twice, and the resistance value is the reference value.

(4) Most of the circuit board is covered with a solder mask. Therefore, the corresponding solder joint should be found as the test point during the measurement. Do not remove the solder film. Some boards are covered with an insulating layer. Only the blade is used to scrape off at the solder joint. Insulation.

(5) The printed circuit should not be cut off at will. Some maintenance personnel have certain experience in appliance repair and are used to check for disconnection. However, most of the circuit boards on CNC equipment are double-sided metal orifices or multi-layered orifices. The printed circuit is fine and dense. Once cut, it is difficult to weld and tangent. It is easy to cut off adjacent lines, and then there are points. When cutting a certain line, it cannot be separated from the line. It is necessary to cut off several lines at the same time.

(6) Components should not be replaced at will. Some maintenance personnel, if they do not determine the faulty component, simply change the component and immediately replace it, so that the false positive rate is higher, and the component with high damage is also high.

(7) When removing components, use a soldering tin and a suction tin. Do not take it hard. The same pad should not be heated and removed repeatedly for a long time to avoid damaging the pad.

(8) Replace the new device, the pins should be properly treated, and the acid solder should not be used in the soldering.

(9) Record the switch on the line, the position of the jumper should not be changed at will. When performing comparison inspections of more than two poles, or when interchanging components, pay attention to marking the components on each board to avoid confusion, and the good board will not work.

(10) Check the power supply configuration and type of the circuit board. According to the inspection requirements, the power supply or all power supply can be separately provided. Attention should be paid to high voltage, some circuit boards are directly connected to high voltage, or there is a high voltage generator in the board, which needs proper insulation, and special attention should be paid during operation.