I find this innovation useful, as it significantly reduces z-axis vibration. Even if you don’t use zhop constantly (and many do, and it takes up significant print time), any z-axis movement will now be faster without increasing vibration. A resonance test for the z-axis can help identify and fix problems on this axis.
Vzbot235, attached the adxl345 to the bed base frame via screw. I have a standard base made of 2020 profile and plastic, as is the entire z-axis.
I increased these parameters because the vibrations were not noticeable against the background noise, but I overdid it a little, I think it’s not a big deal.
accel_per_hz_z: 40
sweeping_accel_z: 100
I think we have several resonances due to the transition nodes. The bed is driven by two trapezoidal screws through Oldham couplings, and then they are connected by a ring belt to a single motor.
Overall, I don’t think you even need to run a resonance test; the mere existence of the 3hump shaper at around 80Hz will dampen almost the entire range, and rounding is probably not important on z-axis. Do you have any comments on this, Dmitry?
If you need to test something else, let me know, I don’t plan to move away from this functionality, and the adxl will probably hang on the bed for a long time.