1. บทนำ
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. เนื้อหาบรรจุภัณฑ์
Each package typically includes the following items:
- SG90 9g Micro Servo Motor(s)
- Various Servo Horns (e.g., cross, star, bar types)
- สกรูยึด
- Small Screwdriver (may be included in multi-packs)
ภาพที่ 2.1: Typical contents of the WWZMDiB SG90 Micro Servo Motor package.
3. ข้อมูลจำเพาะทางเทคนิค
The following table details the key technical specifications of the SG90 Micro Servo Motor:
| คุณสมบัติ | ข้อมูลจำเพาะ |
|---|---|
| ยี่ห้อ | WWZMDiB |
| ชื่อรุ่น | SG90 Micro Servo Motor |
| เล่มที่tage | 4.8V ~ 6.0V (DC) |
| Running Angle | 180° ± 1° (500µsec → 2500µsec) |
| ทิศทางการหมุน | Counter Clockwise (500µsec → 2500µsec) |
| ระบบควบคุม | Change the pulse width |
| Amplifier ประเภท | ตัวควบคุมอนาล็อก |
| ความกว้างของแถบตาย | 7 ไมโครวินาที |
| วัสดุ | พลาสติก |
| น้ำหนักสินค้า | 0.07 กิโลกรัม (ประมาณ 2.46 ออนซ์) |
| ขนาดสินค้า | 1 x 1 x 0.5 นิ้ว (ประมาณ 32 มม. x 31.8 มม. x 12.5 มม.) |
ภาพที่ 3.1: Physical dimensions of the SG90 Micro Servo Motor and its accessories.
3.2 วิดีโอ: This video demonstrates the internal components and testing of a similar 180-degree servo, highlighting its features and durability.
3.3 วิดีโอ: โอเวอร์view of upgraded SG90 servos, showcasing their construction and potential improvements.
4. การติดตั้งและการเดินสายไฟ
The SG90 Micro Servo Motor features a standard 3-wire interface for connection to microcontrollers:
- สายสีแดง: Connects to the 5V power supply.
- สายสีน้ำตาล: Connects to Ground (GND).
- สายสีเหลือง: 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.
ภาพที่ 4.1: SG90 Servo Motor 3-wire interface and connections.
5. หลักการทำงาน
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.
ภาพที่ 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 มิลลิวินาที typically corresponds to 0 degrees.
- A pulse width of approximately 1.5 มิลลิวินาที typically corresponds to 90 degrees (neutral position).
- A pulse width of approximately 2.5 มิลลิวินาที 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.
ภาพที่ 5.2: Pulse Width Modulation (PWM) and servo angle control.
6. การสมัคร
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:
- หุ่นยนต์: Controlling robot arms, grippers, and movement in small robots.
- RC Models: Steering in remote control cars, planes, and boats.
- โครงการ DIY: Actuating mechanisms in various Arduino and Raspberry Pi projects, such as automatic doors, camera pan/tilt systems, and sensor-controlled devices.
6.1 วิดีโอ: Demonstration of the SG90 servo motor in various robotic and DIY applications, including a light-sensitive flag and a robotic arm.
6.2 วิดีโอ: This video showcases the SG90 micro servo motor's use in RC cars and other robotic applications, demonstrating its versatility.
7. การบำรุงรักษา
To ensure the longevity and reliable operation of your SG90 Micro Servo Motor, consider the following maintenance tips:
- รักษาความสะอาด: Protect the servo from dust, dirt, and moisture, which can interfere with its internal mechanisms.
- หลีกเลี่ยงการโอเวอร์โหลด: Do not apply excessive force or torque beyond the servo's rated specifications, as this can damage the gears or motor.
- การจัดเก็บที่เหมาะสม: Store the servo in a dry, cool environment when not in use.
- ตรวจสอบการเชื่อมต่อ: Periodically inspect wiring for any loose connections or damage.
8 การแก้ไขปัญหา
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. การรับประกันและการสนับสนุน
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.