HOBBYWING Justock Sensored Brushless Motor User Manual

01 Safety Notes

ATTENTION:

This product is NOT a toy and is for use by adults and teens over 14 only. Keep out of children's reach. Failure to follow these guidelines may result in product damage, property loss, and physical injury.

• Never leave this product unsupervised when powered on. A malfunction could cause a fire and endanger surrounding devices.
• Carefully check the wire sequences between the ESC and the motor before connecting to avoid mistakes.
• Ensure all wires and interconnecting pieces are well insulated before connection to prevent short circuits, which can damage the product.
• Never allow water, oil, fuel, or other conductive liquids to enter the product or other electronic parts, as these liquids can contain harmful minerals for electrical circuits. If this occurs, turn off the device immediately and dry it thoroughly.
• Read the manuals for all power equipment (ESC, motor, battery, etc.) and the chassis to ensure a rational power system configuration before use. Incorrect configurations can lead to overload and equipment damage.
• Do not operate at full throttle before pinion installation. Over-high RPM under no-load conditions can damage the motor.
• Ensure all parts are securely connected. Misconnections or poor connections can lead to abnormal control, damage, or other unpredictable issues.
• Never let the motor can (shell) temperature exceed 90°C (194°F). Exceeding this temperature can damage the motor and/or demagnetize the rotor.

02 Features

• The motor features a 4-pole 12-slot core. Compared to a 2-pole motor of the same specification, it offers over 25% increased output power, over 10% improved rear-section efficiency, and a 50% reduction in maximum temperature.
• Built-in high-precision Hall sensor and magnetic ring enhance Hall output consistency, ensuring stable motor operation in sensor mode and excellent linearity.
• Dual sensor port design accommodates various wiring needs.
• High-performance stator core, 200°C high-temperature resistant enameled wire, high-precision, high-strength bearings, and an explosion-proof rotor structure guarantee excellent performance and lasting durability.

03 Specifications

04 Installation & Connection

Diagram Description: The diagram shows the physical connections between the motor, Electronic Speed Controller (ESC), battery, receiver, and sensor wire. The motor has a sensor port. The ESC has a switch and connects to the battery and receiver.

1. To Install the Motor

Screws used for installation should be 3mm in diameter and 5mm in length. Before mounting the motor onto the vehicle, ensure all screws are compatible to avoid damaging the motor. Generally, 3mm diameter screws less than 8mm in length are suitable, with the specific length depending on the chassis size.

2. To Connect the Motor

• Connect the three power wires from the ESC to the motor. Ensure connections match the ESC markings: A-A, B-B, and C-C.
• If using a sensored ESC, ensure the Hall-sensor wires are clean and undamaged. Connect them to the sensor ports of the motor and ESC in the correct direction. Warning: The wire sequence of the ESC and motor must strictly follow A-A, B-B, and C-C. Do not alter this sequence.
• If using a sensorless ESC, connecting the motor and ESC as described above might cause the motor to rotate in the opposite direction due to differing phase definitions (#A / #B / #C) among manufacturers. In this case, swap any two wire connections.

3. Checkup

Recheck the installation and all connections carefully before powering on the device.

05 Gear Selection

Selecting the correct gear ratio is crucial to avoid significant losses. Follow these guidelines:

1. Operating Temperature of the Motor

During operation, the motor temperature should remain below 90°C (194°F). Temperatures exceeding 90°C can demagnetize the magnets, melt coils, and damage the ESC due to excessive current. The most effective method to prevent overheating is selecting the appropriate gear ratio.

2. Principle of Gear Selection

To mitigate risks of overheating, ESC/motor damage, or malfunction, begin with a very small pinion gear. Frequently check ESC and motor temperatures throughout a run. This monitoring is essential to ensure you are not causing excessive heating. If motor and ESC temperatures remain stable and low during operation, you can gradually increase the pinion gear size (more teeth) while continuing to monitor temperatures to determine the safe gearing for your vehicle and motor. As climate and track conditions vary, consistently monitor ESC and motor temperatures to protect your electronics.

06 Assembly and Disassembly

To prolong motor life and enhance efficiency, it is recommended to regularly check and clean the motor's bearings. The specific interval depends on usage frequency and terrain. Follow the assembly diagram below for motor assembly, and disassemble in reverse order.

Assembly Steps:

• Step 1: Install the gasket onto the PCB outlet board.
• Step 2: Install the rotor onto the rear end cap with screws (M2 x 4).
• Step 3: Install the sensor board onto the rear end cap with screws (M2 x 3).
• Step 4: Install the rear end cap.
• Step 5: Secure the motor with screws.
• Step 6: Motor assembled.

Parts List:

• Stator x 1PCS
• Rotor x 1PCS
• PCB outlet board
• Sensor board x 1PCS
• Rear end cap x 1PCS
• Gasket
• Screws for fastening the rear end cap x 3PCS (M2 x 4)
• Screws for fastening the Sensor Board x 2PCS (M2 x 3)
• Screws for fixing the motor