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How to Connect a Servo Motor?

2023-11-23 11:32:21

Servo motors are widely used in various applications, from robotics to industrial automation. Connecting a servo motor correctly is essential for its proper functioning and control. In this article, we will provide you with a step-by-step guide on how to connect a servo motor. By following these instructions, you can ensure a successful and reliable connection.

Step 1: Gather the Necessary Components

Before you begin connecting the servo motor, gather the following components:

  1. Servo Motor: Choose a servo motor that suits your specific application requirements. Consider factors such as torque, speed, and size.

  2. Servo Controller: A servo controller is necessary to send control signals to the servo motor. Make sure you have a compatible servo controller that matches the servo motor's specifications.

  3. Power Supply: Servo motors require a stable and appropriate power supply. Select a power supply that meets the voltage and current requirements of your servo motor.

  4. Wires and Connectors: Prepare wires and connectors suitable for the servo motor and servo controller connections.

Step 2: Identify the Motor's Pins

A typical servo motor has three pins that serve different purposes. Identify these pins:

  1. Signal Pin: The signal pin is used to send control signals from the servo controller to the servo motor. It is generally marked as "S" or "SIGNAL" on the motor.

  2. Power Pins: Servo motors have two power pins: positive (+) and ground (-). These pins provide electrical power to the motor. They are usually marked as "+" and "-" on the motor.

Step 3: Connect the Servo Motor

Follow these steps to connect the servo motor properly:

  1. Power Connection: Connect the positive (+) power pin of the servo motor to the positive (+) terminal of the power supply. Similarly, connect the ground (-) power pin of the servo motor to the ground (-) terminal of the power supply.

  2. Signal Connection: Connect the signal pin of the servo motor to the corresponding signal pin on the servo controller. Ensure a secure and reliable connection.

  3. Verify Polarity: Double-check the polarity of the power connections to avoid any potential damage to the servo motor. Reversing the polarity can lead to malfunctioning or even permanent damage.

  4. Secure the Connections: Once all the connections are made, ensure that they are securely fastened and free from any loose or exposed wires.

Step 4: Power Up and Test

After connecting the servo motor, follow these final steps:

  1. Power On: Turn on the power supply connected to the servo motor. Ensure that the power supply is providing the correct voltage and current as specified by the servo motor.

  2. Test Signal Control: Use the servo controller to send control signals to the servo motor. Gradually vary the control signals to observe the motor's response, such as rotation angle or position.

  3. Fine-tune: If necessary, fine-tune the control signals and adjust the servo controller settings to achieve the desired motor behavior.


Connecting a servo motor requires careful attention to detail and proper understanding of the motor's pins and specifications. By following the step-by-step guide provided in this article, you can confidently connect your servo motor to a servo controller and power supply. Remember to choose compatible components, secure the connections, and verify the polarity to avoid any potential issues. With a successful connection, your servo motor will be ready to perform precise and controlled movements in your desired application.

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