Stepper motors translate digital switching sequences into motion. They are used in printers, automated machine tools, disk drives, and a variety of other applications requiring precise motions under computer control. Unlike ordinary dc motors, which spin freely when power is applied, steppers require that their power source be continuously pulsed in specific patterns.
“Currently I am hired as Professor in optics and atmospheric research. In addition, I am chief of the Kjell Henriksen Observatory at UNIS.”