CNC 2DM860H Digital Two Phase Stepper Motor Driver Microstep Controller 2DM860 motor driver  is a digital stepper motor driver, which adopts the latest 32-bit DSP control technology. Users can set microstep within 25600 and multi-range current value within rated current. Built-in microstep technolog greatly improves stability and reduces noise under low microstep. Integrating parameter auto-tuning function, the driver could adjust the optimal operation parameters automatically for different motors to maximize the motor performance.   Features: 1. 32-bit DSP technology. 2. Optically isolated differential input signals. 3. Ultra-low noise and vibration. 4. 2-256 microstep setting range. 5. Can drive 4/6/8 line two-phase stepper motor 6. Current value can be randomly set within rated value. 7. The current is automatically halved at rest. 8. Impulse response frequency up to 250kHz. 9. With overvoltage, undervoltage, short circuit protection. 10. Alarm output function I/O ports. 11. Alarm output function I/O ports.   Specification: Supply voltage: AC 30-80V / DC 40-110V Normal output current: 2.1-8.4A Logic input current: 10mA Impulse response frequency: Max. 250kHz Pulse low level time: Min. 2.5s Weight: Approx. 577g/20.3oz   Package list: 1 x Stepper Motor Driver