6.3.1 Displacement

Displacement is the amount of distance traveled. In stepper motor control, this linear distance is translated into number of steps. The translation is linear, which means $D\propto S$, in which $D$ is the linear displacement (in millimeters, inches or other length units), and $S$ is the number of steps.

In stepper motor control, it is helpful to keep track of the number of steps yet to perform.