1. Introduction
Thank you for choosing the 9imod BLS-HV50MG 50KG Waterproof HV Brushless Digital Servo. This high-performance digital servo is designed for demanding RC applications, offering significant torque, speed, and durability. Its brushless motor ensures faster response and extended lifespan compared to traditional brushed servos. With its IP67 waterproof rating, it is suitable for use in various environments, including wet conditions.
This servo is ideal for 1/8, 1/10, and 1/12 scale crawler trucks, RC cars, boats, robots, and other remote control models requiring precise and powerful steering or control. Please read this manual thoroughly to ensure proper installation, operation, and maintenance of your servo.
2. Safety Warnings
- Always ensure the servo is connected to a power source within its specified voltage range (10.0V to 15V). Exceeding this voltage can cause permanent damage.
- The 14V High Voltage (HV) servo requires an extra power supply if your receiver/BEC cannot provide sufficient voltage and current.
- Avoid continuous stalling or overloading the servo, as this can lead to overheating and damage to the motor or gears.
- Ensure all wiring connections are secure and correct polarity is observed to prevent short circuits.
- While the servo is IP67 waterproof, prolonged submersion or exposure to corrosive liquids should be avoided. After use in wet conditions, dry the servo thoroughly.
- Keep the servo away from small children, as it contains small parts that could be a choking hazard.
- Do not attempt to disassemble or modify the servo, as this will void the warranty and may cause malfunction.
3. Specifications
| Feature | Specification |
|---|---|
| Brand | 9imod |
| Model | BLS-HV50MG |
| Control Angle Options | 180° / 270° / 360° |
| Operation Voltage Range | 10.0V ~ 15V |
| Motor Type | Brushless Motor |
| Gear Material | Stainless Steel Gears |
| Case Material | Full CNC Aluminum Shell |
| Waterproof Rating | IP67 |
| Dead Band Width | 1 usec |
| Control System | PWM Control (1500usec in the central point) |
| Operation Temperature Range | -20°C ~ +60°C |
| Life Cycle | >100 million times (without load) |
| Operation Travel | 60° ± 1 |
| Limit Angle | 180° ± 1 / 270° ± 1 / 360° ± 1 |
| Direction | Re-clock wise / Pulse Travel 500→2500 μsec |
| Driver Type | Mos Drive |
| Potentiometer Type | Direct Drive |
| Amplifier Type | Digital Control |
| Dimensions | 40 x 20 x 48.6 mm (1.57 x 0.78 x 1.91 inches) |
| Weight | 83g (without servo horn) |
| Ball Bearing | 2BB |
| Connector Wire Length | 300mm (JR JST Plug) |
| Connector Wire Gauge | 22AWG |
| Wire Info (Brown) | Negative |
| Wire Info (Red) | Positive |
| Wire Info (Black) | Negative |
| Wire Info (Yellow) | Signal |
Performance Data:
| Parameter | @10.0V | @14V |
|---|---|---|
| Standing Torque | 37kg-cm | 50kg-cm |
| Operating Speed (60°) | 0.12 sec | 0.09 sec |
| Idle Current | 300mA | 400mA |
| Running Current | 4000mA | 5500mA |
4. Installation and Setup
4.1 Mounting the Servo
- Identify a suitable mounting location in your RC model. Ensure there is enough clearance for the servo and its horn to move freely.
- Use the provided screws and brass inserts to securely mount the servo to the chassis or servo tray. Do not overtighten the screws.
- Attach the appropriate servo horn (e.g., 25T metal horn) to the servo output shaft. Ensure it is centered before tightening the screw.
4.2 Wiring Connections
The servo comes with two sets of wires: a standard 3-pin servo connector (signal, positive, negative) and a JST power connector for direct power input.
- Signal Connection: Connect the 3-pin servo connector (Brown: Negative, Red: Positive, Yellow: Signal) to the appropriate channel on your RC receiver or flight controller.
- Power Connection: The servo operates at 10.0V to 15V. If your receiver's BEC (Battery Eliminator Circuit) cannot provide sufficient voltage or current, you must use the JST power connector to supply direct power from a suitable HV battery or external BEC. Ensure the external power source matches the servo's voltage requirements.
- Polarity: Always double-check the polarity of all connections before powering on your system. Incorrect polarity can damage the servo and other electronic components.
5. Operation
5.1 Control Angle Selection
This servo offers selectable control angles of 180°, 270°, or 360°. The specific method for changing the control angle is typically done via a programming card or software provided by the manufacturer (if available) or by adjusting the pulse width range from your transmitter/receiver. Refer to your RC system's manual for details on setting servo travel limits.
5.2 Initial Power-Up and Centering
- With the servo connected to your receiver and power source, turn on your transmitter first, then your RC model's power.
- The servo should move to its neutral (centered) position. If it does not, ensure your transmitter's trim settings are neutral.
- Adjust the mechanical linkage to ensure the controlled surface (e.g., steering, rudder) is also centered when the servo is at its neutral position.
5.3 Testing Movement
Gently move the control stick on your transmitter to test the servo's range of motion. Ensure smooth movement without binding or excessive force. Adjust end-points and sub-trim on your transmitter as needed to prevent the servo from over-traveling or straining against mechanical limits.
6. Maintenance
6.1 General Care
- Regularly inspect the servo for any signs of physical damage, loose screws, or worn wires.
- Keep the servo clean from dirt, dust, and debris. Use a soft brush or compressed air to clean the exterior.
- Check the servo horn and linkages for tightness and ensure they are not binding.
6.2 Waterproofing
The BLS-HV50MG servo has an IP67 waterproof rating, meaning it is protected from dust and can withstand temporary immersion in water (up to 1 meter for 30 minutes). This makes it suitable for use in wet conditions like puddles or light rain.
- After using the servo in wet conditions, wipe it dry with a clean cloth.
- Avoid using harsh chemicals or solvents for cleaning, as they may damage the waterproof seals.
- Do not intentionally submerge the servo for extended periods or in deep water beyond its rating.
6.3 Gear Inspection
The servo features durable stainless steel gears. In case of a crash or severe impact, inspect the gears for any signs of damage or stripped teeth. While robust, extreme forces can still cause wear or breakage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Servo not responding | No power, incorrect wiring, faulty receiver/transmitter, damaged servo. | Check all power and signal connections. Ensure battery is charged. Test with a different servo or receiver if possible. |
| Servo jitters or moves erratically | Interference, low voltage, loose connections, damaged potentiometer. | Check for sources of electrical interference. Ensure adequate power supply. Secure all connections. If problem persists, servo may be faulty. |
| Servo is weak or lacks torque | Low voltage, mechanical binding, excessive load, worn gears. | Verify power supply voltage is within 10.0V-15V. Check for any obstructions in the linkage. Reduce load if possible. Inspect gears for wear. |
| Servo overheats | Continuous stalling, excessive load, mechanical binding, insufficient cooling. | Ensure servo is not constantly fighting against a mechanical stop. Reduce load. Improve airflow around the servo. |
| Servo makes grinding noise | Damaged or worn gears. | Inspect gears for damage. If gears are stripped, replacement may be necessary (contact support). |
8. User Tips
- Voltage Compatibility: This servo is a High Voltage (HV) servo designed to operate between 10.0V and 15V. It will NOT function correctly with a standard 6V BEC (Battery Eliminator Circuit) or receiver power supply. Ensure your power source provides adequate voltage and current for optimal performance.
- Direct Power Wire: Utilize the dedicated JST direct power wire if your main power system cannot deliver the required voltage or current through the receiver. This ensures the servo receives stable and sufficient power.
- Centering: Always ensure your servo is properly centered mechanically and electronically before making final adjustments to linkages. This prevents unnecessary strain on the servo.
9. What's in the Box
- 1 x 9imod BLS-HV50MG 50KG Waterproof HV Brushless Digital Servo
- 1 x Metal Servo Horn (25T)
- Various Plastic Servo Horns
- Mounting Screws and Brass Inserts
10. Warranty and Support
10.1 Liability Exclusion
This servo is designed for use with RC models as specified. The manufacturer accepts no liability for loss, damage, or costs incurred due to incompetent or incorrect use, operation, or maintenance of the product. Users are responsible for understanding and following all instructions and safety guidelines.
10.2 Warranty Service
This product is guaranteed to be free of manufacturing and assembly defects for a period of one year from the date of purchase. The warranty covers material or operational defects present at the time of purchase. Damage resulting from misuse, modification, or failure to observe the procedures outlined in this manual is not covered.
For warranty service or technical support, please contact your original point of purchase or the manufacturer's customer service. Please note that warranty service may vary based on region and seller policies.
10.3 Conformity Declaration
This product complies with relevant and mandatory CE directives and FCC Part 15 Subpart B.