Introduction
This manual provides instructions for the diymore DM90S Micro Servo. This compact, high-performance digital servo features metal gears and a 180-degree rotation angle, making it suitable for various remote-controlled applications such as helicopters, planes, boats, and cars. Please read this manual thoroughly before use to ensure proper installation and operation.
Product Features
- 9 gram metal gear micro servo for RC helicopter, plane, boat, and car applications.
- Deadband setting: 5 microseconds.
- Reaction speed: 0.11 seconds / 60 degrees (4.8V).
- Structural Material: Full metal gears, coreless motor.
- Accessories include servo horns, 30CM long wire, fixing screws, damping pouches, and aluminum sets.
Image: Two diymore MG90S micro servos, showcasing their compact design and metal gear construction.
Image: Key performance attributes of the DM90S servo: Exact Control, Fast Speed, Strong Torque, Stable and Durable.
Specifications
| Specification | Value |
|---|---|
| Product Dimensions | 0.9 x 0.48 x 1.12 inches (22.86 x 12.19 x 28.45 mm) |
| Item Weight | 9 ± 1 g (0.02 lbs) |
| Working Voltage | 4.8V ~ 6.0V |
| Working Speed (at no load, 4.8V) | 0.11 sec/60° |
| Working Speed (at no load, 6.0V) | 0.08 ± 0.01 sec/60° |
| Stall Torque (4.8V) | 2.0 ± 0.20 kg·cm |
| Stall Torque (6.0V) | 2.2 ± 0.20 kg·cm |
| Limit Angle | 180° ± 1° |
| Excessive Play | ≤ 0.5° |
| Working Temperature | -10°C ~ 50°C |
Image: Detailed dimensions of the DM90S micro servo and included servo horns.
Setup and Wiring
The DM90S servo connects to your receiver or control board via a standard three-wire connector. Ensure correct polarity to prevent damage to the servo or control system.
- Yellow Wire: Signal (PWM input)
- Red Wire: Positive Pole (Power supply, typically 4.8V-6.0V)
- Brown Wire: Negative Pole (Ground)
Image: Wiring diagram illustrating the function of each colored wire on the servo connector.
Video: Demonstration of the MG90S servo's movement range when connected to an RC Multiple Tester, showing its response to pulse width adjustments.
Operation
The DM90S servo operates based on Pulse Width Modulation (PWM) signals. The pulse width determines the servo's angular position. A typical pulse width range for 180-degree rotation is from 500 microseconds (0 degrees) to 2500 microseconds (180 degrees), with 1500 microseconds usually representing the 90-degree neutral position.
Image: Diagram showing the relationship between input pulse width and the resulting rotation angle of the servo.
This servo is designed for precise control in various applications:
- RC Models: Ideal for steering in RC cars, controlling ailerons/elevators in RC planes, or rudders in RC boats.
- Robotics: Suitable for small robotic arms, grippers, or sensor platforms requiring angular movement.
- DIY Projects: Can be integrated into various electronic projects needing controlled rotational motion.
Image: Examples of DM90S micro servo applications in robotics, security, and remote-controlled vehicles.
Maintenance
To ensure the longevity and optimal performance of your DM90S servo, follow these maintenance guidelines:
- Keep Clean: Regularly clean the servo exterior to prevent dust and debris from entering the mechanism.
- Avoid Overloading: Do not exceed the specified stall torque. Excessive force can damage the gears or motor.
- Check Wiring: Periodically inspect the wiring for any signs of wear, fraying, or loose connections.
- Lubrication: The metal gears are pre-lubricated. Avoid applying additional lubricants unless specifically recommended by the manufacturer, as this could attract dirt.
- Storage: Store servos in a dry, cool environment away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter issues with your DM90S servo, consider the following common troubleshooting steps:
- Servo Not Responding:
- Check power supply: Ensure the servo is receiving adequate voltage (4.8V-6.0V) and current.
- Verify wiring: Confirm that the signal, positive, and negative wires are correctly connected to the control board/receiver.
- Test with a servo tester: Use a dedicated servo tester to rule out issues with your control board or receiver.
- Jittery or Erratic Movement:
- Insufficient power: A weak or unstable power supply can cause erratic behavior. Try a more powerful battery or power source.
- Signal interference: Ensure the signal wire is not too long or running parallel to power wires, which can introduce noise.
- Damaged gears: Inspect the gears for any visible damage or debris.
- Servo Not Centering Correctly:
- Recalibrate: Re-calibrate the servo's neutral position and endpoints using your control system.
- Mechanical binding: Check for any physical obstructions preventing the servo horn from returning to center.
- Excessive Noise:
- Gear wear: Over time, gears can wear down, leading to increased noise.
- Overload: The servo may be under too much load, causing it to strain.
What's in the Box
Each diymore DM90S Micro Servo package typically includes:
- DM90S Micro Servo(s)
- Assorted Servo Horns (e.g., cross, single arm)
- Mounting Screws
- Damping Pouches
- Aluminum Sets (for mounting)
Image: Contents of the DM90S micro servo package, including the servo, various horns, and mounting hardware.
Warranty and Support
diymore products are manufactured to high-quality standards. For specific warranty information, please refer to the product packaging or contact your retailer. If you require technical assistance or have questions regarding your DM90S Micro Servo, please contact diymore customer support.
Contact Information: Please refer to the official diymore website or your purchase documentation for the most current support contact details.
