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What are the common faults of automatic checkweighers

(1) The automatic checkweigher is powered on, and the contact display screen does not appear.

1. Check whether the power supply is normal and see if the power switch is damaged;

2. Whether the leakage switch inside the electric box has tripped;

3. Check whether the switching power supply itself is damaged;

4. Check if the 24V circuit is short-circuited, and whether the fuse is burned out;

5. Is there any quality problem when contacting the display screen?

(Two) all three belts of the conveyor line do not roll

1. Check whether the 24V voltage output by the switching power supply is normal;

2. Check whether the communication between the display and the PLC is normal (there is a "PLC-IO port" option in the "System Failure" of the "Main Menu" of the display

It tests the communication between the display screen and the PLC, and can check whether the communication is faulty.

(Three) single-segment non-operation of the conveyor belt

1. Check if the synchronous belt is stuck or damaged;

2. Check that the conveyor belt is not caught by foreign objects;

3. Check whether the connection terminals of the motor are loose or may drop;

4. Select the replacement method and reverse the motor drive and motor to see if the driving problem is still the motor failure.

(IV) The automatic checkweigher shows that the detected product is unqualified, but the equipment may not be removed if it is not removed

1. If the removal is not in place, check if the system's removal delay and removal persistence time are set accurately;

2. Check whether the air pressure of the air compressor is normal, check the pressure gauge;

3. Check if the solenoid valve is faulty, test the solenoid valve by hand, and see if there is any response;

4. Check whether the cylinder is faulty;

5, test whether the solid state relay response is normal;

6. Check whether the IO controller part of the automatic checkweigher is burned out.

(5) The automatic checkweigher suddenly appears inaccurate, and may violate the target value.

1. Check whether the parameter settings have been changed artificially;

2. Whether the workshop environment vibration is relatively large or the airflow is large;

3. Whether the distance of incoming materials is the same as originally;

4. Whether the weighing platform is clean and there is no foreign matter sticking to it;

5. Whether the weighing platform conveyor belt and the other two conveyor belts have touched each other;

6. Does the screw maintained by the sensor touch the edge of the weighing platform?

7. Has the sensor been damaged or deformed by heavy pressure?

8. Whether the sensor and motor wires are loose or may be pulled too tightly;

9. Whether the position of the photoelectric switch is adjusted accurately (especially when the measured object is a special-shaped piece).

(6) The conveyor belt has deviated and cannot be adjusted

1. The belt is used for a long time, and the wear is seriously deformed and stretched. Consider replacing the belt.

2. The roller has been used for a long time, and the wear is serious. Consider replacing with a new roller.


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