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STR3 - Miniature Advanced Microstep Drive

Microstep Drives for step & Direction ApplicationsMicrostep Drive for step &
Direction Applications

Great for OEM applications requiring basic step &
direction control of a 2-phase step motor

  • Step & direction or CW/CCW pulse control
  • High performance
  • Anti-resonance
  • Microstepping
  • Mictostep emulation
  • Simple setup
  • Matched step motors available

Designed for OEMsDesigned for OEMs

The STR3 miniature stepper drive is great for OEM applications requiring basic step & direction control of a 2-phase step motor. The drive accepts a range of supply voltages, from 12 to 48 volts DC, and is ideal for use with motor frame sizes NEMA 8 to NEMA 24. Recommended motors for use with this drive are listed below.

  • Step & Direction or CW/CCW Pulse control
  • Automatic idle current reduction
  • Built-in self test move profile
  • DIP switch setup - no software required

Compact Size for Mounting AnywhereCompact Size for Mounting Anywhere

The STR3 is ultra-compact, meaning it can be mounted just about anywhere on the machine. Next to the motor, directly on the machine frame, tucked behind some other components, or located in a control panel with other devices, the STR3 is right at home.

  • Compact size 2.38 x 1.77 x 1.10 inches
  • Pluggable connectors for motor, supply voltage and I/O

Small but PowerfulSmall but Powerful

The STR3 drive features advanced microstepping performance and sophisticated current control with anti-resonance. Each STR3 drive can microstep up to 20,000 steps/rev with a 1.8° step motor (1/100 step), and can even microstep the step motor when the command pulses are low resolution. This feature is called Microstep Emulation. Anti-resonance electronically damps motor and system resonances, which improves motor smoothness and torque over a wide speed range.

  • Current range 0.3A to 3 A/phase
  • Electronic damping (anti-resonance)
  • Microstepping & Microstep Emulation
  • Selectable digital input filter


Model Number: STR3
Supply Voltage: 12-48 VDC
Control Modes: Step & Direction, CW/CCW Pulse
Output Current: 0.3-3.0 A/phase, peak-of-sine
Encoder Feedback: No
Step Resolution: Full, Half, Microstepping, Microstep Emulation
Idle Current Reduction: 50% or 90%
Setup Method: Dip Switches
Digital Inputs: 3 differential digital inputs (STEP+, STEP-, DIR+, DIR-, EN+, EN-)
Dimensions: 2.38 x 1.77 x 1.10 inches
Operating Temperature Range: 0 to 85 °C
Ambient Temperature Range: 0 to 50 °C
Ambient Humidity: 90% max, non-condensing
Status LEDs: 1 red, 1 green
Circuit Protection: Short circuit, over-voltage, under-voltage, over-temp


Recommended Motors:

HT08-020 HT11-012 HT17-275 HT23-595 HT24-100
HT08-021 HT11-013   HT23-598  



STR3 dimensions

I/O Connections:

STR3 I/O connections

Product Page:

Click here to view the STR3 product page.


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