• Servo Systems Co.

Applied Motion Products STR8


The STR8 stepper drive is a compact, powerful, digital step & direction drive, great for OEM applications requiring basic step & direction control of a 2-phase step motor. It outputs up to 8 A/phase to the step motor, and is compatible with a variety of 2-phase step motors that have been selected to optimize performance of both the drive and motor. The STR8 drive features advanced microstepping performance and sophisticated current control with anti-resonance. Anti-resonance electronically damps motor and system resonances, which improves motor smoothness and torque over a wide speed range.

Each step motor drive operates in either Step & Direction or Pulse/Pulse control mode. Selecting between these two modes is done by moving a jumper located under the cover of the drive. Each STR8 drive can microstep up to 20,000 steps/rev with a 1.8º 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. All drive setup is done via dip switches and a rotary switch on the side of the drive, including motor selection, running current, idle current, and step resolution.

Features include:

  • Current range 2.35A to 8.0A peak of sine
  • Electronic damping (anti-resonance)
  • Microstepping & microstep emulation
  • Built-in self test move profile
  • Step & direction inputs
  • CW Pulse/CCW pulse operation
  • Idle current reduction
  • Selectable digital input filter

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Part Number 5000-158
Supply Voltage 24-75 VDC
Supply Voltage Type DC
Control Modes Step & Direction
Output Current 2.35-8.0 A/phase
Communication Ports NA
Encoder Feedback No
Step Resolution •Full
•Microstep Emulation
Idle Current Reduction 50% or 90%S
Setup Method Switch / potentiometer
Digital Inputs 3
Digital Outputs 1
Analog Inputs NA
Dimensions 4.65 x 2.97 x 1.30 inches
Weight 10.8 oz
Operating Temperature Range 0 to 70 °C
Ambient Temperature Range 0 to 50 °C
Ambient Humidity 90% max, non-condensing
Status LEDs 1 red, 1 green
Circuit Protection •Short circuit