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General Rules of Capacitance and Resistance Faults in Scotch Yoke Pneumatic Actuator
发布时间：2019-01-14 来源：艾德威尔•瑞拓
In the process of using the scotch yoke pneumatic actuator, some faults will inevitably occur due to the wear of the machine itself or the irregular operation mode in the working process. Capacitance resistance fault is one of the common faults in pneumatic scotch yoke pneumatic actuator. Below, Beijing Ruitou's Xiaobian, to learn with you about the general law of capacitance and resistance faults in the scotch yoke pneumatic actuator:
1. Fault phenomena:
When the electric actuator is powered on, given a signal (75%), the actuator will open to the end, and then return to the designated position (75%).
Fault diagnosis and repair process:
According to the above fault phenomena, we should first judge which one is wrong with the servo board and the executing agency. Remove the servo board from the actuator and connect the power cord directly to the X5/1 and X5/4 terminals. The actuator closes the direction and connects the power cord to the X5/1 and X5/2 terminals. The actuator moves in the direction. If the action of the actuator is abnormal, the actuator fails on the actuator. The multimeter is used to measure the normal winding of the motor, and then the resistance on both sides of the capacitor is measured. An open circuit is found and the fault is eliminated after replacing it.
The actuator will turn on the power and then turn off the signal (4mA). The actuator will turn on and then turn off.
Fault diagnosis and repair process:
First, remove the servo plate, direct power to the actuator to find that there are still original faults, check the resistance, resistance value is normal, that resistance is no problem, check the motor winding, found that the resistance value is normal, the motor is no problem. From this fault inference, it is possible that the capacitor will be damaged, and the capacitor will be replaced and the fault will be eliminated.
CONCLUSION: Resistance and capacitance should be suspected first when this problem occurs.
The above two cases are the common failure phenomena in the scotch yoke pneumatic actuator. When the above two phenomena occur in the scotch yoke pneumatic actuator, the first thing we should check is whether the capacitance resistance fails.
1. Fault phenomena:
When the electric actuator is powered on, given a signal (75%), the actuator will open to the end, and then return to the designated position (75%).
Fault diagnosis and repair process:
According to the above fault phenomena, we should first judge which one is wrong with the servo board and the executing agency. Remove the servo board from the actuator and connect the power cord directly to the X5/1 and X5/4 terminals. The actuator closes the direction and connects the power cord to the X5/1 and X5/2 terminals. The actuator moves in the direction. If the action of the actuator is abnormal, the actuator fails on the actuator. The multimeter is used to measure the normal winding of the motor, and then the resistance on both sides of the capacitor is measured. An open circuit is found and the fault is eliminated after replacing it.
Conclusion: When encountering the above fault phenomena, we should first determine which part of the fault occurred, and finally determine the root cause.
The actuator will turn on the power and then turn off the signal (4mA). The actuator will turn on and then turn off.
Fault diagnosis and repair process:
First, remove the servo plate, direct power to the actuator to find that there are still original faults, check the resistance, resistance value is normal, that resistance is no problem, check the motor winding, found that the resistance value is normal, the motor is no problem. From this fault inference, it is possible that the capacitor will be damaged, and the capacitor will be replaced and the fault will be eliminated.
CONCLUSION: Resistance and capacitance should be suspected first when this problem occurs.
The above two cases are the common failure phenomena in the scotch yoke pneumatic actuator. When the above two phenomena occur in the scotch yoke pneumatic actuator, the first thing we should check is whether the capacitance resistance fails.
