Things to pay attention to in the maintenance of CNC system - Database & Sql Blog Articles

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

MOS power IC full range

SMD aluminum electrolytic capacitor

Crystal oscillator 2.5*2.0mm 2520 0.67M~170M OSC can be supplied at any frequency

Spot Remarks 2017+

When taking out a certain circuit board from the whole machine, you should pay attention to record the corresponding position, the cable number of the connection. For the fixed installation of the circuit board, you should also take the corresponding crimping parts and screws for recording. 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. The soldering iron should be placed in front of the hand, away from the repair 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. 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 large resistance value is used as the reference value. Most of the circuit boards are covered with a solder mask. Therefore, the corresponding solder joints should be found as test points during the measurement. Do not remove the solder film. If some of the boards are covered with an insulating layer, the insulating layer can only be scraped off with a blade at the solder joint. 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. 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. Use the tin and the suction cord when removing the components. Do not take them hard. The same pad should not be heated and removed repeatedly for a long time to avoid damaging the pad. Replace the new device, the pins should be properly treated, and the acid solder should not be used in the soldering. 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. Check the power supply configuration and type of the circuit board. According to the inspection requirements, you can supply power or all power separately. 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.