Resolution is the smallest incremental move needed. Generally, the higher the pitch, the more accurate the positioning. Ballscrew actuators offer more precise positioning than belt actuators.

Screw pitch scales with the rod helix angle and ... typically use oversized ball bearings to adjust preload. Ball-screw actuators tend to be rigid, highly accurate and precise, because bearing ...

HTI's Micro Actuators have shape-memory-alloy (SMA ... into structures that provide the six degrees of motion (X, Y, Z, pitch, yaw, and roll) found in the HTI BIMORPH µ-Actuator.