The ClearPath-SDSK model allows you to precisely servo-control position (and velocity) using “step & direction” (or quadrature A/B) command signals. These digital signals are commonly used to control stepper motors and digital servos, so they are available from a wide variety of products including PLCs and stand-alone motion control “indexers”. Compared to ClearPath-SDHP models, which also use step & direction control signals, the SDSK models have less peak torque, but are a lower price for any given amount of continuous (RMS) shaft torque and power.