Peter Homann wrote: > Better to hear from Mariss himself. > > <snip> > Simple drives persist in microstepping anyway above this speed. This means > they still try to make the motor phase currents sine and cosine past this > speed. A little problem with that and it's called 'area under the curve'. The > area under the sine function (0 to 180 degrees) is only 78% of a square wave > (full-step). Advantage: Goes to full-step again. > > More sophisticated drives transition from a sine-cosine currents to > square-wave quadrature currents about then. Same as full-steppers. Advantage: > Draw. > Well, without anything to modify the wave, at some point the winding current turns into a triangle wave. Now, maybe the Gecko does this transition to square-wave at a lower speed than where the triangle-wave current appears.
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