DAMIAO J4340P‑2EC Brushless Servo Joint Motor is a precision actuator built for high-torque, low-speed applications in robotics and automation. Equipped with a built-in MIT driver and dual magnetic encoders , it offers absolute single-turn position feedback and maintains accuracy even after power loss. Available in 24V and 48V variants , the motor supports CAN bus communication at 1Mbps and provides real-time feedback on speed, torque, position, and temperature. With a 40:1 gear ratio , it delivers up to 27Nm peak torque , and supports trapezoidal motion profiles for smooth acceleration and deceleration. The compact form factor (57mm diameter, 56.5mm height) and robust protection features—including thermal, voltage, current, and communication safeguards—make it ideal for demanding environments requiring reliable and responsive motion control.
Features
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Dual Encoder: Provides absolute single-turn position feedback of the output shaft; retains accuracy even after power loss.
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Integrated Design: Motor and MIT driver combined into a compact, high-integration unit.
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Visual Debugging: Supports PC-based parameter tuning and firmware upgrades.
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CAN Bus Feedback: Real-time reporting of speed, position, torque, and motor temperature via CAN interface.
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Dual Temperature Protection: Ensures safe operation with two independent thermal safeguards.
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Trapezoidal Motion Profile: Enables smooth acceleration and deceleration in position mode.
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Multiple Control Modes: Supports MIT, speed, position, and force-position hybrid control.
Specifications
| Category | Parameter | 24V Version | 48V Version |
| Electrical Specs | Rated Voltage | 24V | 48V |
| Rated Current | 2.5A | 2.5A | |
| Peak Current | 8A | 8A | |
| Motor Performance | Rated Torque | 9Nm | 9Nm |
| Peak Torque | 27Nm | 27Nm | |
| Rated Speed | 36rpm | 36rpm | |
| Max No-load Speed | 52rpm | 100rpm | |
| Gear Ratio | 16:01 | 16:01 | |
| Motor Properties | Pole Pairs | 14 | 14 |
| Phase Inductance | 360µH | 360µH | |
| Phase Resistance | 880mΩ | 880mΩ | |
| Structure & Weight | Outer Diameter | 57mm | 57mm |
| Height | 56.5mm | 56.5mm | |
| Motor Weight | Approx. 375g | Approx. 375g | |
| Encoder | Resolution | 14-bit | 14-bit |
| Quantity | 2 | 2 | |
| Type | Magnetic encoder (single-turn absolute) | Magnetic encoder (single-turn absolute) | |
| Communication | Control Interface | CAN @ 1Mbps | CAN @ 1Mbps |
| Tuning Interface | UART @ 921600bps | UART @ 921600bps | |
| Control Modes | Supported Modes | MIT, Speed, Position, Force-Position Hybrid | MIT, Speed, Position, Force-Position Hybrid |
| Protection | Driver Over-temp Protection | 120°C – exits enabled mode | 120°C – exits enabled mode |
| Motor Over-temp Protection | User-defined (≤100°C recommended) | User-defined (≤100°C recommended) | |
| Over-voltage Protection | User-defined (≤32V recommended) | User-defined (≤32V recommended) | |
| Communication Loss Protection | Exits enabled mode if no CAN command | Exits enabled mode if no CAN command | |
| Over-current Protection | User-defined (≤9.8A recommended) | User-defined (≤9.8A recommended) | |
| Under-voltage Protection | Exits enabled mode if voltage <15V | Exits enabled mode if voltage <15V |
Applications
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Robotic joints and collaborative arms requiring high torque and precise low-speed control
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Industrial manipulators and automation systems with multi-axis coordination and real-time feedback
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Mobile platforms and AGVs where compact size and thermal safety are critical
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Medical and assistive robotics needing smooth motion and accurate position tracking
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Research and education platforms for advanced motion control experiments and prototyping
Packing List
| Item | Quantity | Description |
|---|---|---|
| Motor (with integrated driver) | ×1 | DM-J4340P-2EC brushless servo motor with built-in driver |
| Power & CAN Cable | ×1 | XT30(2+2)-F single-ended connector cable, 100mm |
| UART Debug Cable | ×1 | GH1.25 3-pin (reverse side) cable, 300mm |