Product Description
The DM-J4310-2EC V1.1 is a compact brushless servo joint motor with an integrated drive and dual encoders, designed for high-precision position, speed, and torque control in robotic joints and motion systems.
With a rated torque of 3Nm, peak torque up to 7Nm, and a 10:1 reduction ratio, this motor provides excellent torque density in a 57mm outer-diameter metal housing.
The motor features two single-turn magnetic encoders, enabling absolute position feedback of the output shaft, even after power loss. Its motor-driver integrated structure significantly reduces wiring complexity while improving reliability and system compactness.
Communication and control are handled via CAN bus (1Mbps) and UART, supporting MIT mode, speed mode, and position mode, along with real-time feedback of speed, position, torque, and motor temperature.
Built-in multi-level protection mechanisms ensure safe and stable operation under demanding conditions.
This joint motor is suitable for robotic arms, legged robots, mobile platforms, automation equipment, and advanced RC or research applications where precise motion control and reliability are required.
Key Features
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Integrated motor + driver design for compact system integration
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Dual encoders with single-turn absolute output shaft position
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No position loss after power-off
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CAN bus communication with real-time feedback
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Supports MIT, speed, and position control modes
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Trapezoidal acceleration/deceleration in position mode
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Visual debugging via host computer
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Firmware upgrade supported
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Double temperature protection (motor & drive)
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Metal housing for durability and thermal stability
Specifications
General Information
| Parameter | Value |
|---|---|
| Model Number | DM-J4310-2EC |
| Version | V1.1 |
| Motor weight | about 300g |
| Origin | Mainland China |
| Material | Metal |
| Quantity | 1 pc |
| Recommended Age | 14+ |
| Use | Vehicles & Remote Control / Robotics |
| Battery Included | No |
| Power Supply Included | No |
| Charger / Adapter Included | No |
| High-Concerned Chemical | None |
Electrical & Performance Parameters (24V)
| Parameter | Value |
|---|---|
| Rated Voltage | 24V |
| Rated Current | 2.5A |
| Peak Current | 7.5A |
| Rated Torque | 3 Nm |
| Peak Torque | 7 Nm |
| Rated Speed | 120 rpm |
| Max No-Load Speed | 200 rpm |
Motor Characteristics
| Parameter | Value |
|---|---|
| Reduction Ratio | 10:1 |
| Number of Pole Pairs | 14 |
| Phase Inductance | 340 µH |
| Phase Resistance | 650 mΩ |
Encoder Parameters
| Parameter | Value |
|---|---|
| Encoder Type | Magnetic Encoder |
| Encoder Resolution | 14 bits |
| Encoder Count | 2 |
| Encoder Function | Single-turn absolute position |
Communication Interfaces
| Interface | Specification |
|---|---|
| Control Interface | CAN bus, 1 Mbps |
| Parameter Adjustment | UART, 921600 bps |
Control Modes & Protection
| Category | Details |
|---|---|
| Control Modes | MIT mode, Speed mode, Position mode |
| Drive Over-Temperature Protection | 120 °C |
| Motor Over-Temperature Protection | Recommended ≤100 °C |
| Over-Voltage Protection | Recommended ≤32 V |
| Under-Voltage Protection | Recommended ≥15 V |
| Over-Current Protection | Recommended ≤9.8 A |
| Communication Loss Protection | Auto disable when CAN command is lost |
Mechanical Structure & Weight
| Parameter | Value |
|---|---|
| Outer Diameter | 57 mm / 2.2 in |
| Height | 46 mm / 1.8 in |
| Motor Weight | ≈300 g / 0.7 lb |
| Packaging Weight | ≈0.5 kg |
Package Options
24V / 48V Motor Package
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1 × Brushless Servo Joint Motor (including integrated drive)
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1 × Power cable with CAN terminal (XT30 (2+2)-F)
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1 × Debug serial signal cable (GH1.25, 3-pin)
24V / 48V USB to CAN Package
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1 × Brushless Servo Joint Motor (including integrated drive)
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1 × Power cable with CAN terminal (XT30 (2+2)-F)
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1 × Debug serial signal cable (GH1.25, 3-pin)
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1 × USB to CAN module
24V / 48V Full Set Package
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1 × Brushless Servo Joint Motor (including integrated drive)
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1 × Power cable with CAN terminal (XT30 (2+2)-F)
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1 × Debug serial signal cable (GH1.25, 3-pin)
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1 × USB to CAN module
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1 × Power adapter board
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1 × Two-ended cable
Cautions & Safety Notes
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Operate strictly within the specified voltage, current, and temperature limits to avoid irreversible damage.
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Prevent debris from entering the rotor to ensure stable operation.
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Inspect all components before use; do not operate if parts are missing or damaged.
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Ensure correct wiring and secure installation before powering on.
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Do not touch the motor during operation—high torque operation may cause surface heating.
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Do not disassemble the motor, as this will affect control accuracy and may cause abnormal operation.
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Avoid hot-swapping and mechanical switching during operation. Surge suppression components are recommended if unavoidable.
Applications
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Robotic arm joints
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Legged robots
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Mobile robots
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Automation equipment
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Research & educational robotics
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Advanced RC and motion control systems
