1. Introduction
This 9IMOD RC Brushless Combo features an AM32 80A ESC, a 3542 1850KV/2250KV Brushless Motor, and an optional Gearbox, designed for 1/10 scale RC Crawler Cars such as the Axial SCX10. The ESC comes pre-installed with AM32 custom firmware, optimized for smooth and quiet operation, and is suitable for various 1/8 scale or smaller vehicles. It includes a built-in adjustable BEC with a maximum current of 10A for high-torque servo applications, and an e-Switch to prevent failures. All wires are pre-soldered for convenience.
Key Features:
- AM32 custom firmware for safe, fast, smooth, and linear throttle response.
- Sine wave start for ultra-low speed motor operation.
- Variable driving frequency.
- Multiple protection functions: Lipo battery low voltage, cell quantity autotest, high-temperature, throttle signal loss.
- High-performance 32-bit MCU.
- E-switch for durability and waterproof capability.
- CNC machined aluminum motor covers, 14 pole torque, 3.17mm (1/8") shaft.
- Integrated motor cooling fan for heat dissipation.
2. Safety Precautions
- Always disconnect the battery from the ESC when not in use to prevent accidental operation and discharge.
- Ensure all connections are secure and properly insulated to avoid short circuits.
- Never operate the RC vehicle in wet conditions unless all electronic components are explicitly rated as waterproof.
- Monitor motor and ESC temperatures during operation. Excessive heat can damage components.
- Use only compatible LiPo batteries (2-6S for ESC, 2-3S for motor) and ensure proper charging and handling procedures for LiPo batteries.
- Keep hands and loose clothing away from rotating parts (motor, gears) during operation.
- Perform regular inspections for any signs of wear or damage to wires, connectors, and mechanical parts.
3. Package Contents
Depending on your selected combo, your package may include:
- 9IMOD AM32 80A ESC
- 9IMOD 3542 Brushless Motor (1850KV or 2250KV)
- USB Link for ESC configuration
- Optional: Transmission Gearbox (Conventional or Belt type)
- Optional: Power Plug (e.g., XT60)
4. Specifications
4.1. ESC Specifications
| Feature | Specification |
|---|---|
| Brand | 9IMOD |
| Battery Input | 2~6S Lipo |
| Continuous Current | 80A |
| BEC Output | Max 10A, 5.2/6.0/7.4/8.2V (Adjustable via DIP switch) |
| Electronic Switch | Supported |
| Firmware | AM32 custom firmware (for AT32 ARM processors) |
4.2. Motor Specifications (3542 Series)
| Feature | Specification |
|---|---|
| Stator | 14 pole 12 slot stator |
| Shaft Diameter | 3.17mm (1/8" D shaft) |
| Input Voltage | 2-3S LiPo |
| Mounting Pattern | 25mm for M3 screws |
| Weight (1850KV) | 145g |
| Weight (2250KV) | 149g |
| Wire Length | 140mm (5.51in) |
| Application | 1/10 Scale RC Car |
4.3. Gearbox Specifications
Conventional Gearbox
- Color: Black / Grey
- Gear: 56T
- Gear Ratio: 13:56
- Gears Set Weight: 37g
- Transmission Box Weight: 172g
- Suit for: RC Crawler Car SCX10 II 90046
Belt Gearbox
- Quantity: 1PCS
- Color: Black / Grey
- Belt Gearbox Gear Ratio: 13:36
- Belt Length: 132mm
- Weight: 155g
- Suit for: RC Crawler Car SCX10 II 90046
4.4. USB Link Specifications
- Purpose: Connects AM32/BL32 ESC to a computer for configuration or firmware upgrade.
- Connection: ESC signal plug, USB Type-C cable.
- Requires: VCP driver installation on the computer.
5. Setup and Installation
5.1. Component Identification
5.2. Wiring Connections
Follow the diagram below to connect the motor, ESC, receiver, and battery. Ensure all connections are firm and correct before powering on.
- Connect the 3 motor wires from the brushless motor to the corresponding motor output wires on the ESC.
- Connect the ESC's receiver plug to the throttle channel (usually channel 2) on your RC receiver.
- Connect the battery plug from the ESC to your LiPo battery.
- Ensure the remote control's throttle trim is at the neutral position before connecting the ESC to the receiver.
Note: The remote must be adjusted to the neutral position for the ESC to connect properly.
5.3. BEC Output Voltage Adjustment
The BEC output voltage can be adjusted using the DIP switches on the ESC. Refer to the table below for settings.
| DIP Switch 1 | DIP Switch 2 | BEC Output |
|---|---|---|
| OFF | OFF | 5.2V |
| OFF | ON | 6.0V |
| ON | OFF | 7.4V |
| ON | ON | 8.2V |
5.4. Gearbox Installation
If your combo includes a gearbox, install it according to your RC car's chassis instructions. Ensure the motor is securely mounted to the gearbox and that the gears mesh correctly without excessive play or binding.
6. Operation and Configuration
6.1. ESC Configuration and Firmware Upgrade
The AM32 firmware allows for advanced configuration and firmware upgrades using a computer and the provided USB Link.
- Download Tools:
Configuration Tool: https://drive.google.com/file/d/1qw2f7hM6OzfHE5GTqMPWB5ZXCELYGY9/view
CH340 Driver: https://www.wch.cn/downloads/CH341SER_EXE.html - Connect Hardware: Connect the ESC signal plug to the USB Link. Connect the USB Type-C cable from the USB Link to your computer.
- Install Driver: Install the CH340 VCP driver on your computer if not already installed.
- Open Configuration Tool: Launch the 'Multi ESC Config Tool 1.82' software.
- Connect to ESC:
a. Check the 'Direct Connect' box (do not check if using a flight controller interface).
b. Select the correct serial port number where the tuner (USB Link) is located.
c. Click the 'Connect' button. - Configure/Upgrade:
a. Read the ESC settings using the 'M1' button.
b. Adjust settings as needed, upload new firmware, or load default EEPROM settings.
c. After making adjustments, save your settings. - Verify: To ensure settings are applied, close the connection, then reconnect and press 'M1' again to read the settings.
6.2. Recommended Setting Parameters
The recommended parameters for the ESC depend on your battery configuration and motor specifications.
For 3S-4S Batteries:
Set the motor KV value and the number of poles according to your motor's specifications. For Sine Mode Power, a value around 6-8 is generally appropriate, depending on the vehicle's weight.
For 6S Batteries:
Important: If using a 6S Lithium battery, do not set the Sine Power value to 10, as this will cause both the motor and the ESC to become very hot.
7. Maintenance
- Cleaning: Regularly clean the motor and ESC to remove dirt, dust, and debris. Use compressed air or a soft brush.
- Inspections: Periodically check all wiring and connectors for signs of wear, fraying, or corrosion. Ensure plugs are securely seated.
- Motor Bearings: Inspect motor bearings for smooth operation. If they feel rough or noisy, they may need lubrication or replacement.
- Gearbox: For gearbox models, check gears for wear and proper lubrication. Ensure the belt (if applicable) is tensioned correctly.
- Storage: Store the components in a dry, cool place away from direct sunlight and extreme temperatures. Disconnect batteries during storage.
8. Troubleshooting
This section provides guidance on common issues and their potential solutions. For more detailed parameter adjustments, refer to the ESC configuration tool.
| Setting Item | Description | Setting Value / Solution |
|---|---|---|
| Engine Stall Protection | Protects the motor from overheating due to being stuck. Usually, this setting is enough unless there are special needs. | Motor with greater external load |
| Start Strength Setting | Adjusts the timing of FET drive signal strength during startup. | Default |
| Loop (Forward/Reverse/Neutral) | Prevents idle vibration. When no power switching is activated, the change in the electrical center is very small. | Closed/Open |
| Caliper Soft Start Protection | This setting mainly reduces impact. When the ESC is loosely connected to the motor hook, activation will reduce the impact. | Motor current when soft protection is activated, closed when switching |
| Steering Auto Correction | Controls tire correction when steering is not touched. | Default does not interfere with body tilt. Left and right tilt |
| Stall Protection | Protective measure against aging of one end of the motor and circuit board damage to prevent reversal. | Suitable for stopping falls |
| Sine Start | Intensity setting (startup force). | Suitable for stopping falls |
| 30-degree Timer | Direction control. | Self-positioning location |
| Shielded/Sensor | The higher the motor KV value, the color. | According to your motor settings |
| Motor KV | Higher voltage mode of the electronic control. | Original controller |
| High Power Engine Setting | Adjusts the frequency of the control engine. | Original high-speed engine control |
| Frequency Response Start Protection | Controls the suppression of noise at startup for most engines. | Default |
| Sine Start (second entry) | If you want the car to be stable when braking downhill, calibrate the parking at a fixed distance. | Default. The fixed distance remains unchanged. |
| Positive Start Power | Easier loss of rotational energy, stronger power setting. Uses less energy but has a stronger torque setting. | Loss of rotation power controlled by electronics |
| Positive Start Power (second entry) | Power setting under positive start. Should be easier to control. Stronger power may cause the vehicle to deplete prematurely. | Loss of power setting by electronics with multiple/success/failure/balanced items |
9. User Tips
- Battery Compatibility: Always ensure your battery's voltage (S-count) matches the motor's recommended input voltage (2-3S LiPo) and is within the ESC's supported range (2-6S LiPo).
- ESC Configuration: Take advantage of the AM32 firmware's configurability. Fine-tuning settings like Sine Mode Power and Running Brake Level can significantly improve your crawler's performance and feel.
- Heat Management: While the motor has an integrated cooling fan, always monitor temperatures, especially during intense use or in warm environments. Proper airflow around the ESC and motor is crucial.
- Gearbox Maintenance: If using a gearbox, regularly check for debris, ensure gears are lubricated, and inspect the belt (if applicable) for wear or proper tension to prevent premature failure.
- Neutral Throttle: Remember to always set your remote control's throttle to neutral before connecting the ESC to avoid unexpected motor activation.
10. Warranty and Support
For any issues, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase records for reference.