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Advanced DSP Digital Stepper Drives
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Highlights
- Step & direction or CW/CCW control
- Advanced DSP-based current control algorithm
- Sensorless stall detection
- Low-middle speed anti-resonance
- Extra low noise; extra low motor heating; smooth motor movement
- Stored configurations for matched stepper motors of NEMA 14, 15, 17, 23, and 34
- Easy setup via DIP switches for microstepping resolution and output current
- Free software for fine tuning, output current, resolutions...
- Automatic stepper motor identification and self configuration
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OverviewMain Features
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By implementing the latest DSP current control technologies, Leadshine EM series stepper drives can deliver excellent performance for your motion control systems. They are easy to implement in OEM applications taking step & direction command controls. With the features of stall detection, anti resonance, extra smooth motor movements, extra low motor noise & heating..., those Leadshine stepper drives can bring your motion systems to a unique level with servo-like performance.
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Without external sensors such as encoders, Leadshine EM series stepper drives can automatically identify stall of driven motors, and feed back fault signals back to motion controller or other devices
In many multiple axis motion control systems such as CNC applications, centralized motion controllers control and coordinate movement of all axes. If connected stepper drives can't identify motor movement stall, the motion controllers keep sending control commands to move the drive motors, even one of the axis has stalled. That could crash the whole control systems, or even damage the whole machine!
By implementing advanced control algorithm, Leadshine's EM series stepper drives can identify stepper motor movement stall (100% at or above 5 rps), feedback the signal(s) back to the motion controller, and thus shut down the system to prevent any potential damages.
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EM series stepper motor drives offer electronic damping for 3 major resonance frequencies for stepper motors at low speed range. That can eliminate undesirable motor speed oscillation and deliver servo-like smoothness.
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Middle speed resonance is the nature for all stepper motors, usual in the speed range of 500-800 RPM. It causes noise,vibration, or even motor movement stalls. By implementing an advanced control algorithm, Leadshine EM series stepper drives calculate resonance frequencies, and thus null them for much better motor movement performance.
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When compared with analog stepper drives (CPLD,FPGA), EM series stepper drives can reduce motor heating up to 70% motor noise.This makes EM series stepper drives ideal solutions for many applications with high requirements for motor noise, such as medical devices, lab automation equipment …
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Motor heating is seen in all stepper applications. Performance of the driving stepper drives play an important role in the overall heating generated. For many applications, analog stepper drives can’t satisfy application the needs of low motor requirements, because of installing space and available radiating device. But compared with analog stepper drives , Leadshine EM series DSP-based stepper drives can reduce motor heating for 10 to 20°C and thus significantly improve overall system performance, extend motor life time, and save energy.
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Leadshine offer matching high quality 2-phase stepper motors in frame sizes NEMA 14, 15, 23, and 34 for EM series stepper drives. Configurations of those motors have been optimized and stored in compatible stepper drives. By simply rotating on the switch (on a stepper drive) to the right position, the pre-configured optimal settings will be stored for a specific Leadshine stepper motor model. An engineer then only needs to set microstep resolution and output current, via a 8-bit DIP switch or Leadshine tuning software.
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Although Leadshine offers a wide range of 2-phase stepper motors in frame sizes of Nema 14, 15, 17, 23, and 34, customers can also use EM series stepper drives to power their own stepper motors. Setup of those drives will be very easy via the feature of “Automatic Motor-Identification and Self-Configuration”. It allows engineers easily configure EM stepper drive for different axes, different motors with different load
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For a specific application, if the available settings via DIP switches on an EM stepper drive are not enough or a client wants to set up its own configurations, Leadshine professional designed software allows a wide range of customization for the best performance.
Here are some of functions that the tuning software, ProTuner for EM Series, can offer
- real-time tuning for 3 commonly seen low-speed resonance areas
- set output resolution to any value between 200 and 104,000 (micro step of full step to 1/512), increased by 200
- set output current to any value between 0.1A to the maximum output current of the specific EM stepper drive
- adjust electrical damping parameter for middle speed range
- choose control mode of Step & Direction, or CW/CWW
- set password protection for your customized configurations
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Use the above filters to refine displayed products
| | Model | Control Mode | Phase | Voltage
Range | DIP Config. Output
Current Range
(A) | Software Config.
Current Range
(A) | Resolution via
DIP Switches | 1 / 5 Pc. Price
(USD) |
| EM402 | Step & Direction | 2 | 20 - 40 VDC | 0.70 - 2.20 | 0.3 - 2.20 | 200-1,600 * | $95.00 / $90.00 |
| EM503 | Step & Direction | 2 | 20 - 50 VDC | 1.46 - 4.20 | 0.5 - 4.20 | 200-25,600 * | $109.00 / $103.00 |
| EM705 | Step & Direction | 2 | 20 - 70 VDC | 1.40 - 7.00 | 0.5 - 7.00 | 200-25,600 * | $129.00 / $122.00 |
| EM806 | Step & Direction | 2 | 20 - 80 VDC | 2.70 - 8.20 | 0.5 - 8.20 | 200-25,600 * | $139.00 / $132.00 |
* Micro step resolution is also software configurable for the range of 200-102,400 (increased by 200)
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