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Stepper motor controller SMSD-1.5

Stepper motor controller SMSD-1.5

Voltage 12 - 24 VDC
Max. current per phase 0.16 - 1.6 A
Microstepping 1/1 - 1/16
Control methods program, analog input to motor
speed control 0 – 5 VDC, potentiometer,
Interface USB

SMSD-1.5 stepper motor controller is designed to control small size stepper motors, output current is under 1.6 A per motor's phase. The controller provides 3 main control modes - programmable, analog speed control and STEP/DIR position control. Digital I/O of the controller make it easy to use the controller together with other electronics of a system.

technical data

Technical data

Inputs DIR, STEP (STEP/DIR driver control mode):
High voltage level 4 - 24 VDC
Low voltage level 0 - 1 VDC
Input resistance 3 kOhm, no less
Communication interface - USB, virtual COM RS-232:
Baud 9600
Bits 8
Parity even
Stop bit 1
Additional output «5VDC»:
Voltage 5 VDC
Maximum load current 20 mA
Resistance 27 Ohm
Control modes

Control modes

  • Program mode -
    this mode is widely used for cycle and repetitive actions. The motion algorithm is recorded from a PC (via USB) to a non-volatile memory of the controller and afterwards it can be executed as per input signal or as per a command from a PC. Please, refer to the user manual for a full list of executing commands. Special software for program assembling and downloading to the controller is provided by our company for free.
  • Analog speed control mode -
    it is used for smooth speed regulation without PC connection. The motor speed is proportional to analog voltage signal, potentiometer regulation is also possible. Direction and start/stop are controlled by digital inputs.
  • Pulse position control STEP/DIR -
    the standard position control mode, motor speed is proportional to a STEP voltage signals frequency, displacement is proportional to a STEP signals quantity. Rotation direction depends on a voltage level at DIR input.


Dimensions stepper motor controller SMSD-1.5