1 Unit for $35 2 Units for $60 Overview: This driver is an industrial-grade fully digital stepper drive developed with advanced DSP control algorithm based on the latest motion control technology. Its motor auto-identification and parameter auto-configuration feature offers quick setup to optimal modes with different motors. Compared with other analog or TB6600 chips driver, it can drive a stepper motor at much lower noise, lower heating, and smoother movement. Key Features: * Anti-Resonance provides optimal torque and nulls mid-range instability * Motor auto-identification and parameter auto-configuration when power on, offer optimal responses with different motors * Multi-Stepping allows a low resolution step input to produce a higher microstep output, thus offers smoother motor movement * 15 selectable microstep resolutions: 1/2, 1/4, 1/5, 1/8, 1/10, 1/16, 1/20, 1/25, 1/32, 1/40, 1/50, 1/64, 1/100, 1/125, 1/128 * Soft-start with no “jump” when powered on * 8 selectable peak current including 1.00A to 4.20A * Pulse input frequency up to 200 KHz, TTL compatible and optically isolated input * Automatic idle-current reduction * Suitable for 2-phase and 4-phase motors * Support PUL/DIR mode * Over-voltage and over-current protections Electrical Specifications: * Output Peak Current: 1.0~4.2A (3.0 RMS) * Input Voltage: +20~50VDC (Typical 36VDC) * Logic Signal Current: 7~16mA (Typical 10mA) * Pulse Input Frequency: 0~200kHz * Pulse Width: 2.5μS * Isolation Resistance: 500MΩ * Cooling: Natural Cooling or Forced cooling * Environment: Avoid dust, oil fog and corrosive gases * Operating Temperature: -10℃~45℃ * Vibration: 10-55Hz / 0.15mm * Weight: Approx.210g (7.4oz)