Input Shaper without effect?!

Thinking this over, I can agree.

  • Attenuation means that energy is “drained” in the system, e.g. by dampers or in our case lack of stiffness
  • Higher stiffness of the entire system / frame means that more resonance energy is seen by the IMU
  • PSD thus gets higher

Back to @LifeOfBrian printer:

Printer y-axis:

  • The basic form of the graph looks OK
  • The big Z component looks a bit fishy, although some Z portion is normal
  • Could be an effect of the IMU mounting

On a bed slinger the IMU is mounted on the bed. How did you do this? Did you mind directions as noted on the IMU’s silk screen?

Printer x-axis:

  • This graph looks like a mechanical problem
  • For comparison see the following two graphs. The first one is always the messed-up axis (binding) and the second one the proper:

Modified Ender 5:

Custom corexy easily capable of accels > 20k

  • Take note of:
    • Very low PSD of the messed-up axis
    • Broad frequency spectrum of resonances of the messed up axis