RMS Technologies, the Driving Force in Motion Control, has the solution for you. RMS has developed the R325 driver with Pole Damping Technology™ (PDT) for the smoothest motion possible.
The R325 has overcome a common smooth motion problem in the motion control industry. This problem occurs when users begin to microstep a step motor. Step motors have a natural tendency to want to move towards their full step ON position. This magnetic pull is called the detent torque of the motor, which causes a jerking motion as the motor nears these positions. This jerking motion causes uneven motion and inaccurate steps when the motor is forced to divide a natural full step into small increments. In a bipolar step motor, one phase will have 100 percent current and the other phase will have 0 percent current at the full step ON position. As the motor microsteps towards the full step ON position, the R325 driver uses Pole Damping Technology by dampening the steps at the poles. Driver manufacturers have developed drivers that output a perfect sinusoidal current waveform, but still have not created perfect accuracy. Engineers in the motion control industry have gone through the trial and error process in order to reduce the jerking and uneven motion of a step motor, but so far these processes have proved to be unsuccessful.
The R325 driver with 256x microstepping capabilities and Pole Damping Technology™ solves this problem 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. Thus, each step will overcome the motor's natural tendency to want to forcefully pull towards the full step ON position.
Pole Damping Technology™, from RMS Technologies, is now available in the R325 microstepping driver and the IMD23 integrated NEMA 23 1.8° step motor and 256x microstepping driver.
RMS Technologies
http://rbi.ims.ca/4418-511
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