Weighing packaging machine maintenance knowledge Nowadays, more and more customers use weighing packaging machines. Mechanized production not only can greatly reduce the labor cost, but also can greatly increase work efficiency. The weighing packaging machines produced by Shanghai Henggang are also increasingly supported and loved by major users throughout the country. Today Xiaobian made some “emergency†measures when it comes to problems with weighing packaging machines. Hope to help the majority of users. Before talking about the maintenance knowledge of the weighing and packaging machine, I would like to remind everyone that the maintenance of the weighing and packaging machine is also very important. The maintenance is good. The maintenance rate of the weighing and packaging machine must be much lower. . Shanghai Henggang's weighing and packing machine usually has a small maintenance workload. It is mainly to regularly refuel part of the machinery and check whether the connection of various parts is loose and whether the air pressure is normal and whether the cylinder stroke is in place . The following highlights several knowledge about the maintenance of weighing packaging machines (1) Instrument failure : The easiest way is to search by analog signal source. The specific steps are as follows : The signal cable from the junction box to the instrument is released , and the socket of the analog signal source is inserted into the weighing instrument interface and connected to the power supply to see if the weighing instrument is working properly . If the weighing instrument is abnormal , the fault is called Heavy gauge. The exclusion of the failure must be carried out by a special inspection personnel. (2) Junction box failure : check the junction box , there is no water vapor intrusion , if there is water vapor , scrub with alcohol , then dry with a hair dryer. Clean the interior. Further look for short-circuit line, the shielded wire resistance measurement with a multimeter other junction box in each line a number in the presence or absence of short circuit, if a short circuit, the cable must be replaced. 2, how to check the sensor there is no damage? (1) First check the appearance quality of the weighing and packaging machine to see if there is abnormal deformation and damage , and whether the cable is damaged. (2) In the junction box, use a digital multimeter to measure the resistance between the positive (E+) and negative (E-) excitation power supplies . The resistance value is approximately 420/ sensors. (3) Disconnect the sensor one by one. Use the previous method to measure the resistance between the positive and negative excitation terminals or between the positive and negative output terminals . See if the resistance value of the certificate matches , and detect the damaged sensor. Of course, you can also search by next step. (4) Place the weights in order on each anchorage of the weigh bucket . If any of the anchorage points is found to be incorrect , it indicates that there is a problem with the sensor at that location and it should be replaced. 3 , weighing packaging machine is not entrained, do not discharge how to do? Weighing and packaging machine does not bag, do not discharge, usually bag switch, bag switch, control bag NHZK710 packaging scale display instrument to send the analog signal on the sensor module into weight data, and then through the NHZK710 packaging scale display The RS485 bus in the instrument (which can realize the setting and collection of weighing data for each called parameter) passes the data to the host computer system ( PLC , DCS ), which analyzes and processes the data and can determine the output bin. How much of the material, you can also send operating instructions to the control actuator on the data to be set, to complete the need for control (for example, into the discharge door switch). Packing materials are manually bagged and touch the proximity switch. After the PLC gets close to the switch closing signal, the bag-valve solenoid valve is energized to control the cylinder movement and clamp the bag. The weighing and packing machine sensor will input the weight signal to the weighing display instrument and compare the data size with the set parameters. After the proximity switch detects that the material door is closed, the weighing instrument is large for the PLC input. 4 , weighing packaging machine does not show how to view the boot? Generally, it is a power failure or fuse blow . In this case, the digital multimeter can be used to measure the resistance value of the weighing packaging machine to determine whether it is damaged . After replacing the damaged device, the weighing instrument can work normally. The small screw feeding signal enables the size of the solenoid valve of the cutting door to be energized, respectively controls the cylinder and drives the action of the cutting plate, and the material enters the weighing hopper for measurement. 5 . More on Maintenance Tips for Weighing Packaging Machines ( 1 ) No bagging, no discharge, usually a problem with the bag switch, the bag switch, the solenoid valve or the cylinder of the control bag. ( 2 ) Weighing and packing machines The size cutting doors and bucket loading doors cannot be opened or closed. Usually, they are problems in controlling solenoid valves or cylinders. ( 3 ) After the weighing of materials is completed, the material loading and material loosening of the weighing packaging machine cannot be automatically opened. If the manual discharging button is not available, the electromagnetic valves or cylinders for controlling the material doors are usually defective. Back to normal. If it is feasible to press the manual discharge button, it indicates that the weighing is too bad or the system parameter setting is wrong. ( 4 ) Weighing and packing machine's hopper mouth or bag mouth leakage material, usually the scale body is not strict sealing , lack of air pressure (check the air source is greater than 0.4MP ) solenoid valve or cylinder problems. ( 5 ) The metering is inaccurate and the meter display is not stable. It may be the instrument zero drift of the weighing and packaging machine (calibration with standard weights) or the parameter settings need to be recalibrated or the load cell is faulty (replace the sensor and take the weight). ( 6 ) When the system of the weighing and packaging machine can not discharge normally, set the selection switch to manual, and then press the discharge button for more than 3s , the corresponding packaging scale can be restored to normal after initialization. The above is just some of the common knowledge about the maintenance of weighing packaging machines. However, since the product design of each weighing packaging machine manufacturer is different and the price of weighing packaging machines is different, it is recommended that you encounter problems. The best time is to call the factory to ask for repair and consult a professional weighing packaging machine to repair after-sales knowledge. If you are not buying Shanghai Henggang Weighing Packaging Machine but need us to provide after-sales help, we will also patiently answer your questions. 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