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Half step simply
means that the motor is rotating at 400 steps per
revolution. In this mode, one winding is energized and then
two windings are energized alternately, causing the rotor to
rotate at half the distance, or 0.9º's. (The same effect can
be achieved by operating in full step mode with a 400 step
per revolution motor). Half stepping is a more practical
solution however, in industrial applications. Although it
provides slightly less torque, half step mode reduces the
amount "jumpiness" inherent in running in a full step mode.
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