Stepper Motor

Stepper motors work on the principal of electrical pulses translated into mechanical movement. Whereas an AC or DC motor will rotate continuously, a stepper motor moves in fixed angular increments. The stepping action is imperceptible due to the small step size and damping in the mechanical system. This provides very good accuracy when positioning, even without feedback. For example, if a stepper motor runs at 25,000 steps per revolution and it is given 50,000 pulses, it will move exactly two revolutions.