Through correct operation to repair the servo system to restore the normal operation of the equipment, what are the methods for detecting the failure of the industrial sewing machine servo system?
Method 1: Observation
Observation method is the most basic maintenance and inspection method. It mainly refers to maintenance technicians relying on visual and tactile sense, through careful observation of the machine, and then compared with the normal working condition of the system, so as to narrow the fault scope or directly find the fault location. For example: observe the controller and the display screen for scratches, plugs are disconnected, the leads are disconnected, the components of the circuit board are scorched, broken feet, pin collisions, etc.
Method 2: System automatic detection method
Today's industrial sewing electrical control systems generally have the function of intelligent automatic detection of faults. We can determine what faults are occurring in the system according to the different alarm codes of the system, and further determine which part has a problem.
After determining the fault code, we can use corresponding treatment methods to repair. Different brands of electronic control systems may use different fault codes, but the specific types of faults are not very different. In addition, the manual of the electronic control system is also marked with obvious and specific notes.
Method 3: Substitution
The replacement method is the most effective method for repair and inspection to reduce the scope of the fault, that is, to replace the corresponding parts on the equipment with new parts to determine whether the part is faulty, the faulty part or the specific component of the fault. When repairing, you should start with large parts and replace them step by step until the fault is detected. This method is mainly used when the accessories are sufficient or the electronic control system is intact.
For example, when servicing the AC servo system, it is necessary to determine whether it is a system problem. Generally, the method of replacing the normal control box is used to determine whether the fault is a problem of the industrial sewing machine machinery or the control box. This method is also used when repairing circuit boards. Replace the “suspected†faulty components in the circuit with good components, observe the changes of the controller, and judge the fault.
Method 4: Open circuit inspection method
The open circuit inspection method is to disconnect a certain functional loop in the control system and observe the working condition of the control system to narrow down the fault scope. For example: if the electromagnet function of the electronic control system fails, an alarm can be made by disconnecting the electromagnet connector or further disconnecting the power supply voltage of the electromagnet to determine whether other circuits are faulty.
Method 5: Voltage measurement method
When the AC servo controller is working normally, the working voltage at various points in the machine indicates the working condition of the machine within a certain range. When a fault occurs, the working voltage will inevitably change. The voltage measurement method is to use a multimeter to detect whether the working voltage of each connector and each test point of the circuit board is too large or too small, and determine the specific cause of the fault according to the abnormal voltage. When measuring, pay attention to the different gears of the multimeter to measure the AC voltage and DC voltage.
The voltage measurement method is usually measured when the machine is live, so pay attention to one-handed operation and safety first. For example, when the electronic control system does not respond after starting, it needs to be measured one by one from the switch to the circuit board when the power is turned on, until the node of the open circuit is found.
Method 6: Resistance measurement method
The resistance measurement method is to determine the specific cause of the fault by detecting the on and off of the line and the resistance value through the ohm file of the multimeter. When a working controller is not energized, some lines are paths, some are open, and some have a certain resistance value. When it does not work normally, its resistance state changes, use the measurement resistance method to detect these changes, and judge the fault location according to the changes.
Remember to measure the resistance, usually when the controller is not charged. For example, the fault detection of the electromagnet is to judge whether it is working normally by measuring the resistance of the multimeter through the ohm file of the multimeter.
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