Servo2Go.com (Greenville, DE) offers Applied Motion Products’ STR2 stepper drive, a compact, digital step and direction drive for applications requiring basic step and direction control of a 2-phase step motor. The drive outputs up to 2.2 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 drive features microstepping performance and 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 drive can microstep up to 20,000 steps/rev with a 1.8º step motor (1/100 step), and can microstep the step motor when the command pulses are low-resolution. All drive setup is done via dip switches on the side of the drive, including motor selection, running current, idle current, and step resolution.