This clip was designed for my Prusa MK3S but can also be used for similar beds (4mm thick), so it might be helpful for you, guys! 💪
For a modified Mk3 printer, you can place an accelerometer on the Y and X axes to fine-tune input shaping parameters when running Klipper firmware. Those parameters are used to allow the printer to run fast, quiet, and accurately by characterizing the resonant frequencies of the whole printer while the axes are in motion and then planning motions that minimize those resonant frequencies.
But this is actually more interesting for the Mk4 which has input shaping and a pin header to plug in an accelerometer from the factory. The default input shaper parameters on the Mk4 can not account for variations in belt tension, bearing wear, and changes to build plate or extruder mass so you need an accelerometer to account for those changes to get that last bit of performance out of the printer.
I used it for 1) Input shaping to find weird resonance frequencies. 2) To tune the TMC driver's parameters to run even more quietly and find resonance speeds to avoid them during printing.
I’ve also done 1, but how did you accomplish 2?
There are two ways - to use Autotune or to use Chopper Resonance Tuner. In the first one, you insert the parameters of motors from the datasheet, cross 🤞 the fingers and hope it will work as it should.
In the second case, it will do a test of every parameter of your drivers and build graphics. Then you'll need to choose the parameters that guarantee the lowest power consumption and noise for every axis. But attention - every test takes 2-4 hours per each axis. This test DOES NOT replace Input Shaping.
Awesome, thank you!