I had an enormous amount of ringing/ghosting with my flash. After making sure all belts were tight, the TMC2100's where on 1.05V and there were no other loose parts, I didn't know what to do.
The best solution so far: Tighten the roller wheels so that the bed and extruder aren't moving freely anymore (but a lot of wear on the wheels...), so it dampens the ringing a little bit. Also the acceleration is reduced to 1000mm/s and the jerk to 5.
I print at 30mm/s by the way, so not even that fast. The ringing is no "somewhat" under control. Here is a picture of the ringing before the reduced acceleration.
Anyone who has the same problem?