(UTC)

The animated image in wrong in that stepper motors don't work that way.  In a 2-phase stepper motor, there are just two electromagnets and the stepping sequence involves changing polarity.  It is a nice image, but it is wrong.  Having a wrong image is worse then having no image.  The image is wrong, the description below the image is also wrong.  The image should show the two coils opposite each other working together and changing polarity.  Like at http://en.nanotec.com/steppermotor_animation.html    21:45, 13 May 2011