Stepper Motor Driver SMD3200

Stepper motor control unit primarily designed for microscope focus control, applicable for many other applications requiring easy stepper motor position control. Motor position is controlled with the use of micro-stepping principle. For precise position control (one micro-step is a fraction of the used native step) mutually shifted sine-waveforms driving the motor windings are used. The number of motor positions is increased by factor of 16 (for standard stepper motor with 200 natural positions per revolution SMD allows 200 x 16 = 3200 positions per revolution).  Position is controlled manually with the use of 3 buttons or from PC through USB port. SMD3200 is installed into a massive anodized aluminum box. The box is equipped with rubber feet to ensure safe position on the desktop.

Basic features and specifications

  • Designed for two-phase bipolar stepper motors
  • Supply voltage: 12-24V DC
  • Coil current: up to 1.5A
  • Microstepping: 1, 2, 4, 16 times
  • PWM current control – high efficiency, minimal heat losses on power side
  • Short circuit protection
  • 2x end limit switch (+5V connected out to the motor connector for using an advanced end limit switches – commonly optical and magnetic switches
  • USB2.0 interface – virtual COM port is identified in system for the easiest way of software integration
  • 3x button for manual operation – speed and booth direction of movement selection
  • Movement parameters: top speed, level of acceleration an deceleration, movement coil current and break coil current.
  • 4x predefined movement parameters in nonvolatile EEPROM
  • 4x LED for displaying the selected movement parameters
  • 2x LED status – communication, power on LED
  • Dimensions: 105 x 90 x 40 mm
  • Color options – passivated aluminum with black engraved labels, anodized black with white engraved labels





SMD unit can be expanded into a multi-axis system on demand (e.g. for cross-tables controlling, positioning telescopes and cameras, macro photography, but also for control of small motors CNC machine tools). According to the used microcontroller SMD can be custom-created to an individual solution, changing the meaning of the buttons, or automatically create a customizable profile, in which the unit can independently perform the movement.

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