- Robots
Robot Model 2
Robot Model 2
- Gimbals
Gimbal 1
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Gimbal 2
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Gimbal 2
Products variations colors and images without any additional plugins.
- Robot Arms
StarAI Arm-cello | violin
StarAI Arm-viola | violin
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UART Bus Servo (RA8-U25-M)
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UART Bus Servo (RP8-U45-M)
$50.001. Feature
- Integrated design of brushless motor, reducer, magnetic absolute encoder and controller.
- Supports the RS-485 protocol with a maximum baud rate of 1Mbps.
- 12-bit magnetic absolute encoder, supporting arbitrary position setting as the origin.
- Supports arbitrary position control within a range of ±368,640°.
- Position retention ensures position data is retained after power-off.
- Integrated trapezoidal acceleration/deceleration control algorithm ensures smooth motion.
- Implements automatic power threshold detection and adaptive reduction for safety.
- Three Stop Modes: Lock Mode, Free Mode and Damping Mode.
- Integrates five protection mechanism for temperature, voltage, stall, power, and current.
- Provides a visual PC configuration tool and supports firmware upgrade.
2. Specification
|
Item |
Specifications |
|---|---|
|
Protocol Type |
UART |
|
Input Voltage |
9.0-12.6v |
|
Motor Type |
Brushless motor |
|
Position Sensor |
12-bit magnetic absolute encode |
|
Effective Position Range |
±180° (Single-turn) |
|
Resolution |
4,096/360°（0.088°） |
|
Processor |
32bit MCU |
|
Baud Rate |
9,600bps~1Mbps |
|
ID Range |
0~254 |
|
Reduction Ratio |
387:1 |
|
Output Spline Specification |
Stainless Steel / Ø6mm / 25T |
|
Gear Material |
All-metal stainless steel composite gear |
|
Interface |
PH2.0-4Pin |
|
Case Materia |
CNC aluminum alloy housing |
|
Dimensions |
40×20×46mm |
|
Appearance |
Single-shaft |
|
Weight |
95g |
|
Operating Temperature |
-10~60℃ |
|
Operating Mode |
Single-turn Position Control Mode |
|
Item |
Specifications |
|---|---|
|
Max Stall Torque |
4.90N·m (50kg-cm) |
|
Max Continuous Torque |
2.26N·m (23kg-cm) |
|
Rated Torque |
0.88N·m (9kg-cm) |
|
Rated Speed |
52rpm (0.192sec@60°) |
|
No Load Speed |
66rpm (0.151sec@60°) |
|
No Load Current |
＜300mA |
|
Standby Current |
＜40mA |
|
Peak Current |
5.5A |
|
Axial Load |
20N |
|
Radial Load |
40N |
3. Performance Graph
4. Instruction Functions
Multi-Turn Angle Control
Supports up to ±368,640° (1024 turns) for extended-range motion with power-off position memory.
Synchronous Command
Executes synchronized control commands across multiple servos based on their assigned IDs.
Asynchronous Command
Stores preset commands in the internal buffer for coordinated, one-time execution when triggered.
Data Feedback
Real-time or batch reading of angle, power, voltage, current, temperature, and more.
Custom Origin Setting
Supports redefining the current position as the new zero point, retaining it even after power cycles.
Three Stop Modes
Selectable stop modes: hold position, release torque, or enter compliance mode as needed.
5. CAD Drawing
6. Development & Compatibility
7. Part List
|
Item |
Qty. |
|---|---|
|
Servo |
1 |
|
8-Hole Main Horn |
1 |
|
PM M3*6mm Screw |
1 |
|
PM M2*4.5mm Screw |
8 |
|
PM M3*14mm Screw |
4 |
|
M3 Lock Nut |
4 |
|
Mounting Spacer |
2 |
|
200mm 3-pin Cable(PH2.0×2) |
1 |
| Protocol Type |
UART |
|---|---|
| Input Voltage |
9.0-12.6v |
| Motor Type |
Iron motor |
| Position Sensor |
12-bit magnetic absolute encode |
| Effective Position Range |
±180° (Single-turn Position Control Mode) | ±368 ,640° (Multi-turn Position Control Mode) |
| Resolution |
096/360°（0.088°） ,4 |
| Processor |
32bit MCU |
| Baud Rate |
600bps~1Mbps ,9 |
| ID Range |
0~254 |
| Output Spline Specification |
Copper / Ø6mm / 25T |
| Gear Material |
All-metal copper-aluminum composite gear material |
| Interface |
PH2.0-3Pin |
| Case Material |
Aluminum alloy middle frame with upper/lower engineering plastic housings |
| Dimensions |
40×20×40mm |
| Appearance |
Single-shaft |
| Weight |
63g |
| Operating Temperature |
-10~60℃ |
| Operating Mode |
Single-turn Position Control Mode | Multi-turn Position Control Mode | Damping Mode |
| Protection Mode |
Temperature Protection | Voltage Protection | Stall Protection | Power Protection | Current Protection |
| Max Stall Torque |
2.45N·m (25kg-cm) |
| Max Continuous Torque |
0.88N·m (9kg-cm) |
| Rated Torque |
0.44N·m (3.4kg-cm) |
| Rated Speed |
18rpm（0.556sec@60°） |
| No Load Speed |
51rpm（0.198sec@60°） |
| No Load Current |
＜200mA |
| Standby Current |
＜20mA |
| Peak Current |
3A |
| Axial Load |
20N |
| Radial Load |
40N |
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UART Bus Servo (HA8-U25H-M)
$30.00
The bus servo integrates a DC motor, gearbox, control driver, sensors, and communication protocol into a single unit, making it highly versatile for applications in robotics, automation, robotic arms, healthcare, and scientific research and education.
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