RADIOMASTER Nexus Helicopter Flybarless Flight Controller User Manual

1. Isingeniso

This manual provides comprehensive instructions for the installation, operation, and maintenance of the RADIOMASTER Nexus Helicopter Flybarless Flight Controller. Designed specifically for Rotorflight 2.0, the Nexus offers advanced control for various helicopter models. Please read this manual thoroughly before use to ensure proper setup and optimal performance.

2. Izici Eziyinhloko

• Rotorflight 2.0 Optimized: Engineered from the ground up for seamless integration with Rotorflight 2.0 flight control software.
• Advanced MCU & Sensor: Equipped with an STM32F722 MCU and a TDK 6-axis MEMS motion tracking device, combining a 3-axis gyroscope and a 3-axis accelerometer for precise flight data.
• Wide Receiver Compatibility: Supports various receiver protocols including CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP, DSM2, DSMX, and F PORT.
• Ukunikezwa kwamandla okuzinzile: Features multiple independent power supplies (1.8V for Gyro, 3.3V for MCU, 5.0V for external interface) to minimize noise.
• Flexible USB-C Connectivity: Includes an ultra-lightweight and flexible USB-C extender cable for convenient access in confined spaces, utilizing silicone wires to reduce vibration transfer.
• Integrated Black Box: A 128Mb onboard flash memory allows for logging flight data, essential for fine-tuning and performance adjustments.
• Secure Receiver Connection: Features a locking connector system compatible with Plug'n'Play solder-free RP3-H ExpressLRS receivers (RP3-H not included) for stable communication.
• Idizayini Enwebekayo: Multi-function UART ports are available for future expansion and peripheral integration.
• Ukwakhiwa Okuqinile: Compact and rugged CNC case provides protection for internal components and acts as a heat sink for thermal management.
• Usayizi Ohlangene: Measures 41mm x 25mm x 13mm, suitable for a wide range of helicopter builds (250/450/500/550/600/700 classes).
• Tail Control Support: Supports a broad spectrum of Tail Motors and Tail ESCs (760µs / 1520µs).

3. Umkhiqizo Uphelileview

The RADIOMASTER Nexus flight controller features a compact design with clearly labeled ports for easy connection. Below are images illustrating the device and its various connection points.

Umfanekiso 3.1: Top-front view of the RADIOMASTER Nexus Flight Controller, showing the main pin headers for S1-S5, TAIL, ESC, RPM, SBUS, and various receiver ports (A-CRSF, B, C, DSM).

Umfanekiso 3.2: Side view of the RADIOMASTER Nexus Flight Controller, highlighting the USB-C port for configuration and data access, along with receiver ports and main pin headers.

Umfanekiso 3.3: Uhlangothi olugobile view of the RADIOMASTER Nexus Flight Controller, providing a clearer perspective of the various input/output connectors and the robust CNC casing.

Umfanekiso 3.4: Phansi view of the RADIOMASTER Nexus Flight Controller, displaying regulatory markings such as FCC and CE, along with the "Made in China" label.

4. Ukusetha nokufakwa

1. Ukukhweza: Securely mount the Nexus flight controller to your helicopter frame. Ensure it is oriented correctly as per the Rotorflight 2.0 software requirements. The compact size (41mm x 25mm x 13mm) allows for flexible placement.
2. Ukuxhuma kwamandla: Connect the flight controller to your helicopter's power distribution system. The Nexus manages its internal power supplies for the Gyro (1.8V), MCU (3.3V), and external interfaces (5.0V).
3. Uxhumo Lomamukeli: Connect your chosen receiver to the appropriate port on the Nexus. The controller supports a wide range of protocols including CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP, DSM2, DSMX, and F PORT. For compatible RP3-H ExpressLRS receivers, utilize the locking connector system for a stable connection.
4. Servo and ESC Connections: Connect your helicopter's servos (cyclic, collective, tail) and Electronic Speed Controllers (ESCs) to the designated S1-S5, TAIL, and ESC pins. Ensure correct polarity and pin assignments. The controller supports 760µs / 1520µs Tail Motors and ESCs.
5. Uxhumano lwe-USB: Use the provided flexible USB-C extender cable to connect the Nexus to a computer. This cable is designed to facilitate access to the USB-C port in various mounting configurations and minimize vibration transfer.
6. Ukucushwa Kwesoftware: Download and install the Rotorflight 2.0 configurator software on your computer. Connect the Nexus and follow the software's instructions for initial setup, calibration, and parameter tuning. Refer to the official Rotorflight 2.0 documentation for detailed software guidance.

5. Ukusebenza

Once the Nexus flight controller is installed and configured with Rotorflight 2.0, it is ready for operation. Ensure all pre-flight checks are performed according to your helicopter's specific requirements.

• Amamodi endiza: Utilize the flight modes configured within Rotorflight 2.0 via your radio transmitter.
• Data Logging (Black Box): The integrated 128Mb Black Box automatically logs flight data. This data is crucial for analyzing flight performance and making precise adjustments to PID gains and other parameters in Rotorflight 2.0. Access and download Black Box logs through the Rotorflight 2.0 configurator.
• Ukuqapha: Monitor your helicopter's behavior during flight. If any unexpected behavior occurs, land safely and review Black Box data or re-check configurations.

6. Isondlo

Proper maintenance ensures the longevity and reliability of your RADIOMASTER Nexus flight controller.

• Ukuhlola Umzimba: Regularly inspect the flight controller for any signs of physical damage, loose connections, or debris.
• Ukuhlanza: Keep the unit clean and free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning. Avoid using solvents or harsh chemicals.
• Ukuphatha Okushisayo: The CNC case aids in heat dissipation. Ensure adequate airflow around the unit, especially during intensive operation.
• Ukuvuselelwa kwe-Firmware: Periodically check the official RADIOMASTER and Rotorflight 2.0 websites for firmware updates. Keeping the firmware current can improve performance and add new features.

7. Ukuxazulula izinkinga

This section provides general guidance for common issues. For detailed troubleshooting, refer to the Rotorflight 2.0 documentation and community resources.

• No Power/Indicator Lights:
  • Check all power connections from the battery to the flight controller.
  • Verify the power source is providing the correct voltage.
• No Connection to Rotorflight 2.0 Configurator:
  • Ensure the USB-C cable is securely connected to both the flight controller and the computer.
  • Zama imbobo ye-USB ehlukile noma ikhebuli.
  • Verify that the necessary USB drivers are installed on your computer.
  • Restart the configurator software and/or your computer.
• Unstable Flight Behavior:
  • Review Black Box logs for anomalies in sensor data or control inputs.
  • Re-check PID tuning parameters in Rotorflight 2.0.
  • Ensure the flight controller is securely mounted and free from excessive vibrations.
  • Verify all servo and ESC connections are correct and functioning.
• Umamukeli Akaphenduli:
  • Confirm the receiver is properly bound to your transmitter.
  • Check the receiver's wiring to the flight controller.
  • Ensure the correct receiver protocol is selected in Rotorflight 2.0.

8. Imininingwane

9. Iwaranti kanye Nokusekela

For specific warranty information regarding your RADIOMASTER Nexus Helicopter Flybarless Flight Controller, please refer to the documentation provided with your purchase or contact the retailer/manufacturer directly. RADIOMASTER is the manufacturer of this product.

For technical support, firmware updates, and additional resources, please visit the official RADIOMASTER website or the Rotorflight 2.0 community forums.