I was specifically experiencing the problem with concentric fill, since the loops get very small towards the center of the fill. The machine gets very shaky due to the speeds involved.
As Dan points out into aforementioned post:
It would be great if Simplify3D could identify small radius turns and lower the speed appropriately... is this available and I'm just missing it?This is often discussed: small tight circles need to be printed slower.
Use a slicer which can slow them down (e.g,, RepG + Altshell plugin with
slowing down for all loops enabled). The issue is that the firmwares
control for linear acceleration but not centripedal. That's because
the firmware has no clue that a small, tight circle is being drawn.
And for centripedal acceleration, it's square(velocity) / radius. Since
you cannot do much about the radius, you're left with reducing the velocity
and that's the job of your slicer.