Waveshare DDSM315 Direct Drive Servo Motor
High-speed 315 RPM direct drive servo motor with RS485 bus, 12-bit encoder, and IP54 waterproof rating — ideal for RC cars, mobile robots, and DIY robotics platforms.
$59.99
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Specifications
Certifications
Components
High-speed direct drive PMSM with 0.55 Nm rated torque, 315 RPM no-load speed, and 1.1 Nm stall torque
Integrated magnetic encoder with 4096 positions for precise closed-loop servo control
Built-in controller supporting current, position, and velocity loop modes via RS485 bus
Bus Interfaces
Overview
The Waveshare DDSM315 is a high-speed direct drive servo motor that integrates a permanent magnet synchronous motor (PMSM) with encoder and servo controller in a lightweight all-in-one package. It spins faster than the DDSM115 (315 vs 115 RPM) while being significantly lighter (349g vs 765g), making it better suited for mobile robots and RC vehicles.
Key Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | 18V DC (5S LiPo) |
| Operating Voltage | 12V - 24V DC |
| Rated Current | 1.45A |
| No-load Current | <=0.3A |
| Locked-rotor Current | <=3.5A |
| No-load Speed | 315 RPM |
| Rated Speed | 200 RPM |
| Rated Torque | 0.55 Nm |
| Locked-rotor Torque | 1.1 Nm |
| Encoder Resolution | 12-bit |
| Communication | RS485 |
| Operating Modes | Current loop, Position loop, Velocity loop |
| Weight | 349g |
| Operating Temperature | -20 to 45 C |
| Noise Level | <=50dB |
| Protection Rating | IP54 |
DDSM315 vs DDSM115 Comparison
| Feature | DDSM315 | DDSM115 |
|---|---|---|
| Max Speed | 315 RPM | 200 RPM |
| Rated Torque | 0.55 Nm | 0.96 Nm |
| Weight | 349g | 765g |
| Best For | Speed, mobile | Torque, precision |
Features
- Direct drive technology — no reducer, near-lossless efficiency
- Integrated 12-bit absolute encoder for closed-loop control
- RS485 bus — daisy-chain multiple motors with unique addresses
- Three control loops: current, position, and velocity
- Real-time feedback: temperature, position, velocity, current
- IP54 waterproof and dustproof protection
- Lightweight design optimized for mobile platforms
Getting Started
Wire the motor to a RS485 controller or transceiver. Use the Waveshare communication protocol to set motor ID, operating mode, and target values. Multiple DDSM315 motors can share a single RS485 bus.
Use Cases
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