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Common failure and treatment of cement packaging machines

Date:2019-01-18 13:55     writer:admin     Views:

  Through long-term application and research, we have summarized the problems that are likely to occur during the use of cement packaging machines. Through the performance of the fault to analyze the cause of the problem, and came up with a solution to the fault.

  Fault performance one: cement packaging machine data no display

  Possible causes:

  1. Power failure or power supply is not in place (refer to open circuit such as insurance tube break, etc.;

  2. Display circuit damage.


  1. Check the power supply and fuse;

  2. Detect the internal circuit.

  Fault performance two: cement packaging machine does not count no alarm

  Possible causes:

  1. Power failure;

  2. Signal line interruption;

  3. Device damage

  Treatment methods:

  1. Check the internal line;

  2. Check whether the power supply is in place;

  3. Detect ic04 and ic 2004.

  Fault performance three: the electromagnet of the cement packaging machine does not pick up

  Possible causes:

  1. Line interruption;

  2. Electromagnet coil is blown;

  3. Internal failure of the host;

  4. Mechanical problem.

  Treatment methods:

  1. Check whether the electromagnet has signs of energization, eliminate mechanical jamming;

  2. Check the electromagnet fuse;

  3. Detect whether the fault is inside or outside the host;

  4. Detect internal power, ssr and ic 2004.

  Fault performance four: cement packaging machine data display disorder

  Possible causes:

  1. Low voltage or unstable;

  2. Power supply or related circuit virtual connection;

  3. Display circuit damage.


  1. Re-power on;

  2. Test and test internal power supply;

  3. Test and replace ic138, computer, etc.

  Fault performance five: in the weighing state, the display increases the negative uniform growth with external force.

  Possible cause: The polarity of the sensor input or output is reversed.

  Treatment proofreading

  Fault performance six: in the weighing state, the display shows no change or abnormal change with the external force.

  Possible causes:

  1. Line interrupt or connection error;

  2. Supply bridge voltage failure;

  3. Sensor damage;

  4. Other internal faults in the host.


  1. Temporary connect a good sensor to judge the fault point;

  2. Further detect the load signal of the sensor and the connection or the host by 1;

  3. Further detect the bridge and amplifier circuit or computer output by the later of 2. Display circuit.

  Fault performance seven: the display does not return to zero after clearing, display-ff or not clear

  Possible causes:

  1. The offset exceeds the zero point and tracking range, the preload is overrun;

  2. The line interruption or connection is wrong;

  3. The clear switch is damaged;

  4. Other faults inside the host.

  Treatment method:

  1. Adjust the level of mechanical parts, especially the reed;

  2. Adjust the reference potentiometer;

  3. Test the line for fault;

  4. Remove the host, apply the clear signal through the internal short circuit to judge the fault is located in the machine. Still from the switch.

  Fault performance eight: system repeatability is not good, bag weight instability

  Possible reasons:

  1. Mechanical repeatability is not good;

  2. Random external force such as artificial touch or improper operation, unstable operation;

  3. Problems with initial installation or supporting equipment.

  Treatment methods:

  1. Carefully observe and adjust according to the principle of mechanical maintenance;

  2. Eliminate interference, operate correctly;

  3. Re-adjust the electrical system;

  4. Perform overall transformation on the equipment.

  Fault performance nine: calibration, setting or reference potentiometer imbalance

  Possible reasons:

  1. The relevant connection is interrupted;

  2. The three-terminal regulator is faulty;

  3. The preload is overrun;

  4. The voltage regulator, potentiometer, etc are damaged.


  1. Adjust the mechanical parts, especially the reed level;

  2. Check the line condition;

  3. Detect the power supply and voltage regulator.

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