Automatic quantitative packaging scale is a key equipment used for material quantitative packaging in industrial production, and its maintenance work directly affects packaging accuracy, equipment life, and production efficiency. The following systematically elaborates on the maintenance points from four aspects: daily maintenance, regular maintenance, troubleshooting, and precautions:
1、 Daily maintenance
Cleaning and Inspection
Material residue cleaning: After each operation, use a soft cloth or compressed air to clean the materials attached to the surface of the scale body, hopper, feeding device, and weighing sensor to prevent residue from clumping or corroding the equipment.
Equipment appearance inspection: Check whether the various components of the scale body (such as hopper, bracket, sensor) are loose, deformed or damaged, and promptly record and handle any problems found.
Lubrication and fastening
Lubrication of transmission components: Regularly add lubricating oil to transmission components such as chains, gears, and bearings to reduce wear and extend service life.
Bolt tightening: Check whether the bolts at various connection parts of the equipment are loose, especially key parts such as weighing sensors and feeding devices, to ensure stable operation of the equipment.
Running status monitoring
Weighing accuracy calibration: Empty scale calibration is required before daily work to ensure that the weighing accuracy meets the requirements. If the weighing error exceeds the allowable range, the machine should be stopped immediately for troubleshooting.
Packaging speed and stability: Observe whether the packaging speed meets the set value, whether there is any leakage or unstable weighing during the packaging process, and adjust parameters or clean blockages in a timely manner.
2、 Regular maintenance
Monthly maintenance
Calibration of weighing sensor: Use standard weights to calibrate the weighing sensor, ensuring that the weighing accuracy is within ± 0.1%.
Electrical system inspection: Check whether the wiring inside the control cabinet is loose, and whether the electrical components such as relays and contactors are working properly to avoid equipment failure caused by poor contact.
Pneumatic system maintenance: If the equipment is equipped with pneumatic devices, it is necessary to check whether the air source pressure is stable, and whether components such as cylinders and solenoid valves are leaking or stuck.
Quarterly maintenance
Mechanical component maintenance: Disassemble and inspect mechanical components such as feeding devices, measuring buckets, and bag clamping devices, clean up internal material accumulation, and replace worn seals or bearings.
Software system upgrade: If the device is equipped with a PLC or touch screen control system, it is necessary to regularly update the software version, fix known vulnerabilities, and optimize control logic.
Annual Maintenance
Comprehensive performance testing: Entrust professional technicians to conduct comprehensive performance testing on the equipment, including weighing accuracy, packaging speed, stability and other indicators, to ensure that the equipment meets production requirements.
Replacement of vulnerable parts: According to the usage of the equipment, replace vulnerable parts such as weighing sensors, belts, chains, seals, etc., to avoid failures caused by component aging.
3、 Troubleshooting
Abnormal weighing accuracy
Possible reasons: malfunction of weighing sensor, material adhesion, blockage of feeding device, incorrect calibration parameters.
resolvent:
Check if the connection wire of the weighing sensor is loose or damaged, and replace the sensor if necessary.
Clean the residual materials in the hopper and feeding device to ensure smooth material flow.
Re calibrate the weight to ensure that the calibration parameters match the material characteristics.
Unstable packaging speed
Possible reasons: feeding device malfunction, electrical control malfunction, insufficient pneumatic system pressure.
resolvent:
Check whether the feeding motor, reducer and other components are working properly, and clean the blockage of the feeding port.
Check if the PLC or touch screen control program is running properly and fix logic errors.
Adjust the air source pressure to ensure stable cylinder operation.
The device cannot start
Possible reasons: power failure, emergency stop button not reset, safety door not closed.
resolvent:
Check if the power circuit is energized and if the fuse is blown.
Reset the emergency stop button and close all safety doors.
Check if the relays and contactors inside the control cabinet are properly engaged.
4、 Precautions
Operating Specifications
Strictly follow the equipment operation manual to avoid overloading or unauthorized operation.
During the homework process, it is prohibited to adjust parameters or disassemble equipment components at will, and they must be operated by professional technicians.
Environmental Requirements
The equipment should be installed in a dry, ventilated, and non corrosive gas environment to avoid damage caused by moisture or corrosion.
Keep the area around the equipment clean and prevent debris from entering the interior and affecting normal operation.
Spare Parts Management
Establish spare parts inventory, stock commonly used vulnerable parts such as weighing sensors, belts, chains, etc., to ensure timely replacement in case of failure.
Regularly inspect the quality of spare parts to avoid secondary failures caused by aging of spare parts.
Training and Recording
Regularly train operators to improve their equipment maintenance awareness and skill level.
Establish equipment maintenance records, recording the time, content, and results of each maintenance, upkeep, and troubleshooting to facilitate subsequent analysis and improvement.