Operates from +15 to 48 VDC Phase current from 0.3 to 3.0 Amps Peak Step Resolutions from Full to 256 microstepping Hold current reduction capability with adjustable current and timeout settings Three optically isolated control inputs and one optically isolated control output Pole Damping Technology™ R325I & R325IE additional features Configuration parameters stored in non-volatile memory Multiple module control through software assigned single character addresses Built-in control routines for trapezoidal position and velocity moves R325IE only features Static Encoder Feedback with a full set of parameters to configure a wide variety of motor and encoder combinations. Homing on Encoder Index Eight user presetable target positions
Pole Damping Technology™ Pole Damping Technology™ (PDT) enhances step motor performance by creating a more accurate and smooth motion profile. PDT optimizes the microstepping performance of the step motor by outputting the correct amount of run and hold current to the motor, at the right time. Thus, each step will overcome the motor's natural tendency to want to forcefully pull towards the full step ON position. The graphs below show what Pole Damping Technology™ can do for your applications. Notice the spikes that a competitor’s driver creates at every 64th step when running the motor at 64x microstepping. This sudden “jump” is caused by the detent torque of the motor. Taking a closer look at the graph reveals that the few microsteps prior to the huge spike are inconsistent as well. The spikes are due to the step motor correcting itself over time; when error is accumulated during the 63 microsteps, the 64th step forces the motor to line up evenly between stator and rotor. After the stator and rotor are aligned, the problem is repeated during the next 1.8°. The R325 driver eliminates these spikes by using Pole Damping Technology™. As the name implies, dampens each step as it nears the full step position where the poles are the strongest, resulting in smooth motion and even steps.