Closed-Loop Stepper Motor Drive
Feature
- Self-adaptive auto-tuning: Built-in intelligent identification algorithm; automatically matches motor parameters upon power-on.
- Intelligent vibration suppression: Embedded self-developed anti-resonance algorithm effectively suppresses resonance during low-to-medium speed operation.
- Ultra-high microstepping resolution: SD6 series supports up to 51,200 microsteps per revolution.
- Multi-protocol communication: Supports pulse/direction control, Modbus, CAN bus, and other industrial communication protocols.
- Multiple safety protections: Integrated over-current, over-voltage, stall detection functions; real-time monitoring of driver and motor status.
Closed-Loop Stepper Motor Drive: Servo-Level Precision, Stepper-Level Cost
The SD6 stepper drive is entirely self-developed—from hardware design and underlying algorithms to upper computer software—possessing full intellectual property rights. Upgrade your motion control architecture with our advanced closed-loop stepper drive.
By integrating high-resolution encoders and in-house DSP algorithms, this drive monitors rotor position in real time and automatically adjusts current and torque, reducing the risk of missed steps under sudden load changes while maintaining positioning accuracy.
Designed to bridge the performance gap between stepper motors and AC servo motors, our closed-loop drive offers better dynamic performance with lower vibration and heat. It supports Pulse+Direction, RS485 (Modbus RTU) and CAN bus, so it works both as a drop-in upgrade for existing pulse systems and as a networked axis controlled from a host.
Key Applications
CNC Machine Tools: CNC engraving machines, laser cutting machines, lathe and milling machine feed systems.
Packaging Machinery:Sealing and cutting machines, labeling machines, filling machines.
Textile Machinery: Embroidery machines, flat knitting machines, warp knitting machines.
3C Electronics Manufacturing: Pick and place machines, dispensing machines, inspection equipment.
Robotics: Industrial robot joints, AGV drives.
Lithium Battery & Photovoltaic Equipment:Winding machines, stacking machines, string welding machines.
Why Choose SD6 Series?
Fully Self-Developed Solution: Independent R&D across hardware, firmware, and software; incomparable to generic boards.
Flexible OEM Customization: Hardware, firmware, and branding can be customized on demand with rapid response.
Easy Installation: Adaptive and tuning-free, reducing labor costs.
Stable Operation: Proprietary vibration suppression technology ensures smooth motor operation.
Flexible Integration: Pulse/Modbus/CAN tri-mode communication adapts to various control systems.
Safe & Reliable: Multiple protection mechanisms reduce failure risks.
SD6 stepper drive
Is the SD6 stepper drive fully self-developed?
A: Yes, the SD6 series is entirely self-developed from hardware design to firmware algorithms and PC software, possessing full intellectual property rights.
Does SD6 support OEM customization?
A: Yes, we support deep OEM customization, including hardware specifications, firmware functions, and brand logos, all customizable according to client needs.
Which motors does the SD6 stepper drive support?
A: It supports 2-phase stepper motors with frame sizes 42, 57, 60, 86, and 110.
What is the maximum microstepping resolution for SD6?
A: It supports up to 51,200 microsteps, achieving high-precision positioning.
What communication methods does the SD6 stepper drive support?
A: It supports Pulse+Direction, Modbus RTU, and CAN bus protocols.
Does SD6 have protection functions?
A: Yes, it features over-current protection, over-voltage protection, and stall detection to ensure comprehensive operational safety.
Selection Guide
| Product Model | SD6-1A2 | SD6-2A2 | SD6-3A2 |
|---|---|---|---|
| Input Power | DC24-70V | DC24-50V | DC24-36V |
| Output Current | 8A | 6A | 4A |
| Pulse Signal Input Voltage | DC 5-24V | DC 5-24V | DC 5-24V |
| Control Mode | Pulse, Modbus, CAN | Pulse, Modbus, CAN | Pulse, Modbus, CAN |
How to choose a closed loop stepper driver: three parameters decide it
Start with frame size and phase current. The SD6 series covers 42 / 57 / 60 / 86 / 110 frame two-phase stepper motors, with models rated DC 24-70 V / 8 A, DC 24-50 V / 6 A and DC 24-36 V / 4 A. Size the drive from the motor nameplate phase current and leave headroom above it.
Then look at the control method. The SD6 closed loop stepper driver supports Pulse+Direction, RS485 (Modbus RTU) and CAN bus, so it works both as a direct replacement for an existing open-loop driver without changing the host program, and as a networked axis scheduled from a host controller.
Finally consider microstepping and the encoder. The SD6 supports up to 51,200 microsteps and monitors rotor position through a high-resolution encoder, which suppresses resonance and reduces heating in the low-to-medium speed range - the most tangible benefit of a closed loop stepper motor driver over an open-loop scheme.
Closed loop stepper driver versus AC servo: where the cost differs
A closed loop stepper driver adds encoder feedback to a stepper motor and corrects current and torque inside the drive. Its cost stays close to a stepper solution while covering a good part of the applications that would otherwise need a servo - low-to-medium speed positioning where the cycle is demanding but ultimate dynamic response is not. In that band, the SD6 is usually the better value than a full AC servo system.
Choose an AC servo drive system or a low voltage DC servo system when the machine runs continuously at high speed, accelerates and decelerates frequently, or has an explicit following-error requirement. For interpolated multi-axis motion, an MC26 multi-axis motion controller schedules the axes. For open-loop applications see the SD5 open loop stepper driver.