UAZNJFZ ZMR NX4 EVO Flight Controller Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, setup, and operation of the UAZNJFZ ZMR NX4 EVO Flight Controller. This device is designed to enhance the stability and control of fixed-wing aircraft, offering various flight modes to suit different pilot skill levels.

Please read this manual thoroughly before using the flight controller to ensure proper setup and safe operation.

2. Key Features

NX4 EVO Specific Features:

• Four Flight Modes: Beginner, Practice, Intermediate, Expert.
• Supported Model Types: Single aileron, dual ailerons, triangle (delta wing), and V-tail aircraft.
• Gain Control Methods: Control gain from the radio transmitter or independent gain adjustment via variable resistor on the controller board.
• Safe Flight Mode: Ensures stable flight characteristics.
• Automatic Aileron Leveling: Assists in maintaining level flight.
• 3D AVCS Flight: Attitude locking for advanced maneuvers.
• Includes Y-wiring for aileron connections.

NX4 PRO Specific Features (for comparison):

• Three Flight Modes: Rate Mode (offset correction), Hold Mode (attitude hold), Gyro-Off Mode (direct transmitter control).
• Supported Model Types: Single aileron, dual ailerons, flapperons, delta, and V-tail aircraft.
• Gain Control Methods: Control gain from the radio transmitter or independent gain adjustment via variable resistor on the controller board.
• Utilizes advanced algorithms for enhanced control sensitivity.

3. Specifications

NX4 EVO Flight Controller:

NX4 PRO Flight Controller (for comparison):

4. Product Overview

Figure 1: ZMR NX4 EVO Flight Controller, showing the main unit, included wiring harness, and double-sided mounting tape.

Figure 2: Top view of the NX4 EVO controller, highlighting the DIP switches for configuration and the clearly labeled servo output ports (Aileron R, Aileron L, Elevator, Rudder, Emerg, Multi).

Figure 3: Bottom view of the NX4 EVO controller, showing the internal circuitry through the translucent casing and the servo input pins.

5. Setup and Installation

5.1 Mounting the Controller

1. Choose a Location: Select a flat, stable surface on your fixed-wing aircraft, ideally near the center of gravity. Ensure the controller is mounted horizontally and securely.
2. Clean Surface: Clean the mounting area thoroughly to remove any dust or grease.
3. Apply Mounting Tape: Use the provided double-sided adhesive tape to secure the flight controller firmly to the chosen surface. Ensure the arrow on the controller points towards the front of the aircraft.

5.2 Wiring Connections

Refer to Figure 2 for port identification. Connect your receiver and servos to the flight controller as follows:

• Receiver Input: Connect the corresponding channels from your RC receiver to the input pins on the side of the flight controller (Ail, Ele, Rud, Multi).
• Servo Output: Connect your aircraft's servos to the labeled output ports:
  • Aileron R/L: Right and Left Aileron servos. (Use Y-wiring if only one aileron channel is available from receiver).
  • Elevator: Elevator servo.
  • Rudder: Rudder servo.
  • Emerg/Multi: Emergency or Multi-function channel (e.g., throttle, gear).
• Power: The flight controller is typically powered through one of the receiver channels from your ESC's BEC or a separate UBEC. Ensure the voltage is within the specified DC 4.5 - 6V range.

5.3 Initial Configuration (DIP Switches)

The NX4 EVO features DIP switches for initial setup. The exact configuration depends on your aircraft type and desired settings. Consult the specific instructions provided with your controller for detailed DIP switch settings. Generally, these switches control:

• Aircraft type (e.g., normal wing, delta wing, V-tail).
• Flight mode selection (e.g., Gyro On/Off, specific stabilization modes).
• Reversing servo directions (if needed, though typically done on the transmitter).

Note: Always perform a thorough ground test after configuration to verify all control surfaces respond correctly to transmitter inputs and gyro corrections.

6. Operating Modes

The NX4 EVO offers four distinct flight modes, selectable via your radio transmitter (if configured) or through the controller's settings:

• Beginner Mode: Provides maximum stabilization and limits control surface throws, making it easier for new pilots to learn. Features automatic aileron leveling.
• Practice Mode: Offers significant stabilization but allows for greater control input, suitable for pilots gaining confidence.
• Intermediate Mode: Reduced stabilization, allowing for more agile flight while still providing some assistance.
• Expert Mode (3D AVCS): Minimal or no stabilization, providing direct control for advanced maneuvers and 3D flight. Features attitude locking.

6.1 Gain Adjustment

The sensitivity of the gyroscope (gain) can be adjusted using two methods:

• Radio Transmitter Control: If your transmitter has an auxiliary channel assigned to gain control, you can adjust the gain in real-time during flight.
• Variable Resistor: The controller board has a variable resistor (potentiometer) that allows for independent, manual adjustment of the gain. Use a small screwdriver to carefully turn the resistor.

Recommendation: Start with lower gain settings and gradually increase them until you find the optimal balance between stability and responsiveness for your aircraft.

7. Maintenance

• Keep Clean: Regularly inspect the controller for dust, dirt, or debris. Clean gently with a soft, dry brush or compressed air.
• Check Connections: Ensure all wiring connections are secure and free from damage before each flight.
• Avoid Moisture: Protect the controller from moisture and extreme temperatures.
• Physical Inspection: Periodically check the casing for any signs of damage.

8. Troubleshooting

• Aircraft Unstable/Oscillating:
  • Possible Cause: Gain setting is too high.
  • Solution: Reduce the gain setting using either the transmitter or the variable resistor on the board.
• No Response from Control Surfaces:
  • Possible Cause: Incorrect wiring, power issue, or receiver not bound.
  • Solution: Verify all connections, check power supply to the receiver and controller, ensure receiver is properly bound to the transmitter.
• Control Surfaces Move in Wrong Direction:
  • Possible Cause: Servo reverse setting incorrect.
  • Solution: Adjust servo reverse settings on your radio transmitter. Do not use the controller's DIP switches for reversing unless explicitly instructed by specific model documentation.
• Controller Not Powering On:
  • Possible Cause: Insufficient or incorrect power input.
  • Solution: Check power source (BEC/UBEC) and ensure voltage is within 4.5-6V. Verify power connection polarity.

9. Warranty and Support

For warranty information and technical support, please refer to the documentation provided at the point of purchase or contact UAZNJFZ customer service directly. Keep your proof of purchase for warranty claims.

For additional resources and community support, consider searching online forums dedicated to RC flight controllers and fixed-wing aircraft.