UnoDrive™ Stepper Motor Driver
Full & Half Step, 40V 1.2A



  • Bipolar constant current output
  • Automatic overtemperature protection
  • Selectable full step/half step operation
  • Compact design
  • Power indicator
  • Low cost
UnoDrive Photo

The UnoDrive is a constant current stepper motor driver. It receives step and direction signals from the controller and can drive motors with up to 40 volts to maximize the high speed performance. The UnoDrive can be used in conjunction with our OptiStep Plus, MN100 or MN400 motion controllers or with any controller capable of producing TTL compatible step and direction signals.


Drive circuit

Constant current bipolar chopper

Chopping rate

20 KHz nominal

Operating voltage range

12 ~ 40 VDC

Output Current

Resistor selectable

Stepping Modes

Half / Full step jumper selectable

Current cutback

Automatic after one second of idle

Step input signal

TTL compatible positive edge trigger

Direction input signal

TTL compatible positive edge trigger

Fault and Home output signals

Open collector type (50 mA max sink)

Motor control outputs

4 current mode chopper lines per axis

Current capability

1.2 amps maximum

Physical dimensions

4.00" w × 2.325" d × 1.23" h

Working temperature range

32° F ~ 158° F (0° C ~ 70° C)


Five years parts and labor

UnoDrive Block Diagram


UnoDrive Typical Application


UnoDrive Mechanical Outline