That makes sense to me, since the inductance stores energy. The higher the current, the more energy. The driver has to switch the coils against their natural current flow, so there is extra time needed when there's more energy stored than necessary.
Thus, cranking up the stepper current beyond the 'sweet spot' makes them slower.
I wish, I could explain it better...
Thus, cranking up the stepper current beyond the 'sweet spot' makes them slower.
I wish, I could explain it better...