Input shaping without accelerometer

Adamfilip

Is it possible to calibrate input shaping without an accelerometer

Can you just print a test tower with different frequency settings and compare results.
since tests are needed to confirm results what is the main benefit of using accelerometer sensor?

chrishamm

@Adamfilip I think it is possible to approximate the ringing frequency by printing a sample, see https://www.klipper3d.org/Resonance_Compensation.html#ringing-frequency

The main benefit of accelerometer-based tuning is that it is easier. Collected accelerometer data can be used to retrieve the ringing frequencies as well using FFT.

CCS86

@Adamfilip said in Input shaping without accelerometer:

Is it possible to calibrate input shaping without an accelerometer

Can you just print a test tower with different frequency settings and compare results.
since tests are needed to confirm results what is the main benefit of using accelerometer sensor?

Absolutely.

I use custom "after layer change" g-code, in Superslicer, to sweep a range of frequencies:

{if layer_num < 25}M593 P"none"
{else}M593 P"MZV" F{15+(layer_num-25)*1.5}
{endif}

This will use no IS below layer 25. Then after that will use type:MZV (choose your type), starting with 15 Hz. By changing that 1.5 multiplier (depending on your print height) you can end at a specific frequency.