1. Introducció
The WWZMDiB SG90 Micro Servo Motor is a compact and versatile component designed for various electronic projects, including remote control applications, robotics, and DIY projects with microcontrollers like Arduino and Raspberry Pi. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance.
2. Contingut del paquet
Each package typically includes the following items:
- SG90 9g Micro Servo Motor(s)
- Various Servo Horns (e.g., cross, star, bar types)
- Cargols de muntatge
- Small Screwdriver (may be included in multi-packs)
Imatge 2.1: Typical contents of the WWZMDiB SG90 Micro Servo Motor package.
3. Especificacions tècniques
The following table details the key technical specifications of the SG90 Micro Servo Motor:
| Característica | Especificació |
|---|---|
| Marca | WWZMDiB |
| Nom del model | SG90 Micro Servo Motor |
| Voltage | 4.8V ~ 6.0V (DC) |
| Running Angle | 180° ± 1° (500µsec → 2500µsec) |
| Direcció de gir | Counter Clockwise (500µsec → 2500µsec) |
| Sistema de control | Change the pulse width |
| AmpTipus més viu | Controlador analògic |
| Dead Band Width | 7 µs |
| Material | Plàstic |
| Pes de l'article | 0.07 quilograms (aproximadament 2.46 unces) |
| Dimensions del producte | 1 x 1 x 0.5 polzades (aprox. 32 mm x 31.8 mm x 12.5 mm) |
Imatge 3.1: Physical dimensions of the SG90 Micro Servo Motor and its accessories.
Vídeo 3.2: This video demonstrates the internal components and testing of a similar 180-degree servo, highlighting its features and durability.
Vídeo 3.3: Un acabatview of upgraded SG90 servos, showcasing their construction and potential improvements.
4. Configuració i cablejat
The SG90 Micro Servo Motor features a standard 3-wire interface for connection to microcontrollers:
- Fil vermell: Es connecta a la font d'alimentació de 5V.
- Fil marró: Connects to Ground (GND).
- Fil groc: Connects to a digital pin (e.g., Digital Pin 9 on Arduino) for signal input.
Ensure correct polarity when connecting the wires to avoid damage to the servo or microcontroller.
Imatge 4.1: SG90 Servo Motor 3-wire interface and connections.
5. Principis de funcionament
The SG90 servo motor operates based on Pulse Width Modulation (PWM) signals. A microcontroller sends a PWM signal to the servo, which then interprets this signal to control the rotation of its internal motor.
Imatge 5.1: Internal composition of a servo motor.
The angle of the servo is determined by the duration of the pulse applied to the signal wire. The servo expects to see a pulse approximately every 20 milliseconds. The length of this pulse dictates the motor's position:
- A pulse width of approximately 0.5 ms typically corresponds to 0 degrees.
- A pulse width of approximately 1.5 ms typically corresponds to 90 degrees (neutral position).
- A pulse width of approximately 2.5 ms typically corresponds to 180 degrees.
Pulse widths between these values will result in intermediate angles. The servo rotates to the commanded position and holds it until a new pulse width is received.
Imatge 5.2: Pulse Width Modulation (PWM) and servo angle control.
6. Aplicacions
The SG90 Micro Servo Motor is suitable for a wide range of applications due to its small size, light weight, and precise control. Common uses include:
- Robòtica: Controlling robot arms, grippers, and movement in small robots.
- RC Models: Steering in remote control cars, planes, and boats.
- Projectes de bricolatge: Actuating mechanisms in various Arduino and Raspberry Pi projects, such as automatic doors, camera pan/tilt systems, and sensor-controlled devices.
Vídeo 6.1: Demonstration of the SG90 servo motor in various robotic and DIY applications, including a light-sensitive flag and a robotic arm.
Vídeo 6.2: This video showcases the SG90 micro servo motor's use in RC cars and other robotic applications, demonstrating its versatility.
7. Manteniment
To ensure the longevity and reliable operation of your SG90 Micro Servo Motor, consider the following maintenance tips:
- Mantenir net: Protect the servo from dust, dirt, and moisture, which can interfere with its internal mechanisms.
- Eviteu la sobrecàrrega: Do not apply excessive force or torque beyond the servo's rated specifications, as this can damage the gears or motor.
- Emmagatzematge adequat: Store the servo in a dry, cool environment when not in use.
- Comproveu les connexions: Periodically inspect wiring for any loose connections or damage.
8. Solució De Problemes
If you encounter issues with your SG90 Micro Servo Motor, consider these common troubleshooting steps:
- Servo Not Moving:
- Check power supply: Ensure the servo is receiving 4.8V to 6.0V.
- Verify wiring: Confirm that the Red, Brown, and Yellow wires are connected correctly to 5V, GND, and the signal pin, respectively.
- Check signal: Ensure your microcontroller is sending a valid PWM signal to the servo.
- Erratic Movement or Jitter:
- Power supply issues: Insufficient current from the power supply can cause erratic behavior. Try a separate power supply for the servo if using many.
- Noise on signal line: Ensure the signal wire is not picking up electrical noise. Keep it away from power lines if possible.
- Incorrect pulse width: Verify that the PWM signal's pulse width is within the servo's operational range (0.5ms to 2.5ms).
- Servo Making Noise but Not Moving:
- Mechanical obstruction: Check for any physical obstructions preventing the servo horn from moving.
- Overload: The servo might be trying to move a load that is too heavy. Reduce the load or use a more powerful servo.
- Damaged gears: Internal gears might be stripped. This often results in a grinding noise.
9. Garantia i Suport
For any warranty claims, technical assistance, or further inquiries regarding your WWZMDiB SG90 Micro Servo Motor, please contact the seller directly through the platform where the purchase was made. Provide your order details for efficient support.
