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Eight possible faults and solutions for electric actuators

2020-07-01


Eight possible faults and solutions for electric actuators

1. The electric actuator does not run, but the power and signal lights of the control module are on, and there is no obvious fault.

Solution: Check whether the power supply voltage is correct, check whether the motor is disconnected, and check whether the ten-core plug is disconnected from the end to the end of each line.


2. The actuator does not run, and the power light is on and the signal light is off.

Treatment method: Check whether the polarity of the input signal is correct, and check whether the control module is good by the comparison and interchange method.


3. Improper adjustment of system parameters causes frequent oscillation of the actuator.

Treatment method: The parameter setting of the regulator is inappropriate, which will cause the system to produce different degrees of oscillation. According to the manufacturer's instructions or actual use experience, the parameters are revised again.


4. The actuator motor generates heat quickly, oscillates and crawls, and stops motion within a short time.

Treatment method: use AC 2V voltage file to test whether the input end of the control module has AC interference. Check whether the signal line is isolated from the power line, check whether the potentiometer and potentiometer wiring are good, and check whether the feedback component operates normally.


5. The actuator position feedback signal is too large or too small.

Treatment method: check whether the adjustment of the "zero position" and "stroke" potentiometers is correct, and check the replacement control module to judge.


6. After the signal is applied, the actuator is fully open or fully closed, and the limit switch is also non-stop.

Treatment method: check whether the function selection switch of the control module is in the correct position, check whether the adjustment of the "zero position" and "stroke" potentiometers is correct, and check the judgment by replacing the control module.


7. Electric actuator oscillates and chirps.

Treatment method: mainly because the sensitivity is adjusted too high, the insensitive area is too small, and it is too sensitive, so that the small loop of the actuator cannot be stabilized and oscillates. The sensitivity can be finely adjusted counterclockwise to reduce the sensitivity; the fluid pressure changes too much, the actuator thrust Insufficient; the choice of regulating valve is large, and the valve often works in small opening.


8. The electric actuator does not operate normally, but the motor does not stop after the limit switch operates.
Treatment method: check whether the limit switch and the limit switch wiring are faulty; replace the control module to judge.


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