Leadshine® DMA860H 2-Phase Digital Stepper Motor Drive
Product Description
The Leadshine® DMA860H is a fully digital stepper motor drive developed with an advanced DSP control algorithm based on modern motion control technology. It is designed to deliver smooth motor movement, optimal torque, and reduced mid-range instability.
Featuring motor auto-identification and parameter auto-configuration, the DMA860H can automatically identify connected motor characteristics and adjust its operating parameters to achieve optimized performance. Compared with traditional analog drives, it provides lower motor noise, reduced heating, and smoother motion.
The DMA860H supports 2-phase and 4-phase hybrid stepper motors and offers eight selectable output current settings up to 7.2 A Peak. It operates with an input voltage of 18–80 VAC or 26–113 VDC and supports pulse input frequencies up to 200 kHz.
With 16 selectable microstep resolutions, Multi-Stepping technology, Anti-Resonance, and automatic idle-current reduction, the DMA860H is suitable for demanding motion control applications requiring smooth operation, high speed, and precise positioning.
Key Features
- Fully Digital Control: Advanced DSP control algorithm for smooth and stable motor operation.
- High Output Current: Eight selectable peak current settings from 2.40 A to 7.20 A.
- AC or DC Power Input: Supports 18–80 VAC or 26–113 VDC input voltage.
- Anti-Resonance Technology: Provides optimal torque and helps eliminate mid-range instability.
- Motor Auto-Identification: Automatically identifies motor characteristics and configures operating parameters.
- Multi-Stepping Technology: Converts low-resolution step input into higher microstep output for smoother motor movement.
- 16 Microstep Resolutions: Selectable resolutions from 400 to 51,200 steps per revolution for a 1.8° motor.
- High-Speed Pulse Input: Supports pulse frequencies up to 200 kHz.
- Multiple Control Modes: Supports PUL/DIR and CW/CCW control modes.
- Optically Isolated Inputs: TTL-compatible control inputs for improved noise immunity.
- Automatic Idle-Current Reduction: Reduces current when the motor stops to help minimize heating.
- Soft Start: Prevents sudden motor movement when powered on.
- Built-in Protection: Includes over-voltage and over-current protection.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Leadshine |
| Model | DMA860H |
| Product Type | Fully Digital Stepper Motor Drive |
| Motor Compatibility | 2-Phase and 4-Phase Hybrid Stepper Motors |
| Input Voltage (AC) | 18–80 VAC |
| Input Voltage (DC) | 26–113 VDC |
| Typical AC Input Voltage | 48 VAC |
| Typical DC Input Voltage | 68 VDC |
| Output Current Range | 1.0–7.2 A Peak |
| Selectable Peak Current | 2.40 / 3.08 / 3.77 / 4.45 / 5.14 / 5.83 / 6.52 / 7.20 A |
| Maximum Pulse Input Frequency | 200 kHz |
| Minimum Pulse Width | 2.5 μs |
| Pulse Voltage | 5 VDC |
| Control Modes | PUL/DIR and CW/CCW |
| Logic Signal Current | 7–16 mA |
| Microstep Resolution | 16 selectable settings |
| Microstep Range | 400–51,200 steps/rev |
| Motor Auto-Identification | Yes |
| Parameter Auto-Configuration | Yes |
| Anti-Resonance | Yes |
| Multi-Stepping | Yes |
| Idle Current Reduction | Automatic reduction to 50% |
| Input Isolation | Optically Isolated |
| Protection | Over-voltage and Over-current |
| Cooling | Natural or Forced Cooling |
| Ambient Temperature | 0–50°C |
| Maximum Operating Temperature | 70°C |
| Storage Temperature | -20–65°C |
| Humidity | 40–90% RH |
| Weight | Approx. 620 g |
Output Current Configuration
The DMA860H provides eight selectable peak output current settings through DIP switches SW1, SW2, and SW3.
| Reference Current | Peak Current |
|---|---|
| 2.00 A | 2.40 A |
| 2.57 A | 3.08 A |
| 3.14 A | 3.77 A |
| 3.71 A | 4.45 A |
| 4.28 A | 5.14 A |
| 4.86 A | 5.83 A |
| 5.43 A | 6.52 A |
| 6.00 A | 7.20 A |
The appropriate current setting depends on the motor's rated phase current, winding configuration, and connection method. The manual explains that the actual current in the motor coil may be lower than the selected dynamic current, particularly at high speeds.
Microstep Resolution
The DMA860H supports 16 selectable microstep resolutions through DIP switches SW5, SW6, SW7, and SW8.
For a 1.8° stepper motor, the available settings are:
| Microstep | Steps per Revolution |
|---|---|
| 2 | 400 |
| 4 | 800 |
| 8 | 1,600 |
| 16 | 3,200 |
| 32 | 6,400 |
| 64 | 12,800 |
| 128 | 25,600 |
| 256 | 51,200 |
| 5 | 1,000 |
| 10 | 2,000 |
| 20 | 4,000 |
| 25 | 5,000 |
| 40 | 8,000 |
| 50 | 10,000 |
| 100 | 20,000 |
| 200 | 40,000 |
These settings allow users to select the required positioning resolution and achieve smoother motor movement.
Advanced Motion Control Technologies
Anti-Resonance
Anti-Resonance technology helps eliminate mid-range instability and provides optimal torque, contributing to smoother and more stable motor operation.
Motor Auto-Identification and Auto-Configuration
The DMA860H can identify the connected motor's characteristics and automatically calculate the drive's current-loop parameters to optimize performance.
For the first installation, the manual instructs users to activate the auto-tuning procedure by switching DIP switch SW4 twice within one second after powering up, with no pulse signal applied. The procedure should be repeated if the motor or power supply is changed.
Multi-Stepping Technology
Multi-Stepping allows a low-resolution step input to produce a higher microstep output, helping achieve smoother motor movement without requiring the controller to generate the full microstep pulse frequency.
Control Signal Modes
The DMA860H supports two control modes:
- PUL/DIR: Separate pulse and direction signals.
- CW/CCW: Separate clockwise and counter-clockwise pulse signals.
The drive accepts differential and single-ended control signals, including open-collector and PNP outputs, through its three optically isolated logic inputs.
The active pulse edge and control signal mode can be selected using the internal jumpers.
Applications
The Leadshine DMA860H is suitable for demanding motion control applications, including:
- CNC machines and CNC routers.
- Engraving machines.
- Laser cutting machines.
- X-Y positioning tables.
- Labeling machines.
- Pick-and-place equipment.
- Industrial automation systems.
- High-speed positioning systems.
- Applications requiring low noise, reduced heating, and high positioning precision.
Frequently Asked Questions
1. What type of stepper motors are compatible with the Leadshine DMA860H?
The DMA860H supports 2-phase and 4-phase hybrid stepper motors. The manual mentions applications involving different motor frame sizes, but its compatibility references are not fully consistent. Always verify the motor's electrical requirements before selecting the drive.
2. What is the maximum output current of the DMA860H?
The maximum output current is 7.2 A Peak. The drive provides eight selectable peak current settings ranging from 2.40 A to 7.20 A.
3. What power supply can I use with the DMA860H?
The specified input voltage range is 18–80 VAC or 26–113 VDC. The manual lists typical values of 48 VAC and 68 VDC. The power supply must be selected carefully, taking voltage fluctuations and motor-generated back EMF into account.
4. Does the DMA860H support PUL/DIR and CW/CCW control?
Yes. The drive supports both PUL/DIR and CW/CCW control modes. The operating mode can be selected using the internal jumpers.
5. What is the maximum pulse input frequency?
The DMA860H supports pulse input frequencies up to 200 kHz, with a minimum pulse width of 2.5 μs.
6. Does the DMA860H support microstepping?
Yes. It offers 16 selectable microstep resolutions, from 400 to 51,200 steps per revolution for a 1.8° motor.
7. What is the purpose of the automatic motor identification feature?
The automatic motor identification and auto-configuration function identifies the connected motor's characteristics and calculates the drive's current-loop parameters to optimize motor performance. The manual specifies an SW4 activation procedure for the initial installation.
8. Can the DMA860H be used with stepper motors from other manufacturers?
Yes. The manual states that the drive can match stepper motors manufactured by Leadshine and other manufacturers. However, the motor's rated phase current, winding configuration, connection method, and electrical requirements must be checked to ensure compatibility.
Download: