HKD DM860H DSP Digital Stepper Motor Driver 7.2A with Cooling Fan

The HKD DM860H DSP Digital Stepper Driver is a high-performance, professional-grade stepper motor driver designed for demanding motion control applications. Built around advanced DSP (Digital Signal Processing) technology, the DM860H delivers smooth, precise, and reliable control of two-phase stepper motors, making it ideal for CNC machines, automation equipment, engraving systems, and industrial motion platforms.

This driver supports both AC and DC power inputs, offering exceptional flexibility for integration into a wide range of systems. It can operate on 18-80V AC or 24-110V DC, allowing it to handle higher torque motors while maintaining excellent efficiency and stability. With a maximum output current of up to 7.2A, the DM860H is well suited for medium to large stepper motors requiring strong torque and accurate positioning.

To ensure long-term reliability, the DM860H features a large built-in cooling fan combined with a robust ABS enclosure for effective heat dissipation. This active cooling system allows the driver to maintain stable operation even under continuous or high-load conditions.

Advanced Motion Control Performance

The DM860H uses an H-bridge bipolar constant current drive architecture, delivering smooth motor operation with reduced vibration, noise, and resonance. With 15 selectable microstepping (subdivision) modes, the driver supports resolutions ranging from 400 to 25,600 pulses per revolution (PPR), enabling extremely fine motion control and improved positioning accuracy.

Current output is adjustable in 0.1A resolution steps, allowing precise matching to the motor's rated current. This not only improves motor performance but also reduces heat generation and power consumption.

Protection, Efficiency & Reliability

Designed for industrial environments, the DM860H includes multiple built-in protection features to safeguard both the driver and motor:

• Overcurrent protection
• Over-temperature protection
• Energy-saving semi-automatic current reduction when the motor is idle
• Off-line hold function to maintain position without unnecessary power draw

High-speed opto-isolated signal inputs ensure strong noise immunity, making the driver reliable even in electrically noisy environments such as CNC machines and factory automation systems.

Key Features

• DSP-based digital stepper motor driver
• Supports 4-wire and 8-wire two-phase stepper motors
• Wide input voltage range: 24-110V DC / 18-80V AC
• Maximum output current: 7.2A
• Adjustable current with 0.1A resolution
• 15 selectable microstepping modes
• Subdivision range: 400-25,600 PPR
• H-bridge bipolar constant current drive
• High-speed opto-isolated inputs
• Standard single-pulse control interface
• Built-in cooling fan for efficient heat dissipation
• Energy-saving automatic current lock function
• Integrated over-temperature and overcurrent protection
• Durable ABS enclosure, industrial-grade design

Technical Specifications

• Model: DM860H
• Motor Type: 2-Phase Stepper Motor (4-wire / 8-wire)
• Input Voltage:
  DC: 24-110V
  AC: 18-80V
• Maximum Output Current: 7.2A
• Current Adjustment Resolution: 0.1A
• Microstepping Modes: 15 selectable
• Subdivision Range: 400-25,600 PPR
• Drive Type: H-Bridge Bipolar Constant Current
• Cooling: Built-in Fan
• Protection: Overcurrent, Over-temperature
• Material: ABS
• Color: Black

Typical Applications

• CNC routers and milling machines
• CNC plasma and laser cutters
• Engraving and carving machines
• 3D printers (industrial / large format)
• Automation and robotic systems
• Packaging machinery
• Motion control platforms
• Industrial positioning systems

What's in the box
1 x HKD DM860H DSP Digital Stepper Motor Driver 7.2A with Cooling Fan