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    AC Servo Drives Troubleshooting

    The servo driver is a controller used to control the servo motor. Its function is similar to the frequency converter. It is used for ordinary AC motors. It is a part of the servo system and is mainly used in high-precision positioning systems. Generally, the servo motor is controlled by three methods of position, speed and torque to achieve high-precision positioning of the transmission system.

    In order to ensure the normal operation of the equipment, it has become a very important task to judge the fault in time and deal with it in time. Here we will introduce the analysis and troubleshooting of the AC servo motor drives.


    If the safety device (molded-case circuit breaker or fuse) installed in the power supply line operates, remove the cause before you supply power to the SERVOPACK again. If necessary, repair or replace the SERVOPACK, check the wiring, and remove the factor that caused the safety device to operate.
    There is a risk of fire, electric shock, or injury.


    The product may suddenly start to operate when the power supply is recovered after a momentary power interruption. Design the machine to ensure human safety when operation restarts.
    There is a risk of injury.


    • When an alarm occurs, remove the cause of the alarm and ensure safety. Then reset the alarm or turn the power supply OFF and ON again to restart the operation.
      There is a risk of injury or machine damage.
    • If the Servo ON signal is input to the SERVOPACK and an alarm is reset, theĀ servo motor may suddenly restart the operation. Confirm that the servo is OFF and ensure safety before you reset an alarm.
      There is a risk of injury or machine damage.AC Servo Drive for 200W-400W Servo Motor
    • Always insert a magnetic contactor in the line between the main circuit power supply and the main circuit power supply terminals on the SERVOPACK so that the power supply can be shut OFF at the main circuit power supply.
      If a magnetic contactor is not connected when the SERVOPACK fails, a large current may flow, possibly resulting in fire.
    • If an alarm occurs, shut OFF the main circuit power supply.
      There is a risk of fire due to a regenerative resistor overheating as the result of regenerative transistor failure.
    • The holding brake on a Servomotor will not ensure safety if there is the possibility that an external force (including gravity) may move the current position and create a hazardous situation when power is interrupted or an error occurs. If an external force may cause movement, install an external braking mechanism that ensures safety.

    Disposal Precautions

    When disposing of the servo drive, treat it as ordinary industrial waste. However, local ordinances and national laws must be observed. Implement all labeling and warnings as a final product as required.

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