Might as well make my own thread to post results.
More info on the resonance testing.
Pic of the accelerometer installed on the carriage. If your bed moves on the Y axis you'd also need to mount it to the bed as well.
First runs. From what I understand the power spectral density is the strength of the vibrations. Tried to google what it actually means and it is way above my head. My results actually seem decent. The PSD is pretty low. But I don't like the 2nd hump in the frequency curve. Maybe belt tension can fix it?
First comparison is too see how much of an impact the fans have on vibrations. You can see another small hump for the X axis.
But the Y axis the impact is huge. The fan adds more vibrations than the printer's motion system.
So I went to tightening the belts a bit more. Tightened about 3 teeth more, which was pretty damned tight. This looks rather bad. Over 4 x the strength of vibrations and a much wider frequency range. This absolutely would have an impact on print quality.
Needed to print a part as my motor mounts are being bent out of shape from belt tension. So more testing after I get that resolved.
More info on the resonance testing.
Measuring Resonances - Klipper documentation
www.klipper3d.org
Pic of the accelerometer installed on the carriage. If your bed moves on the Y axis you'd also need to mount it to the bed as well.
First runs. From what I understand the power spectral density is the strength of the vibrations. Tried to google what it actually means and it is way above my head. My results actually seem decent. The PSD is pretty low. But I don't like the 2nd hump in the frequency curve. Maybe belt tension can fix it?
First comparison is too see how much of an impact the fans have on vibrations. You can see another small hump for the X axis.
But the Y axis the impact is huge. The fan adds more vibrations than the printer's motion system.
So I went to tightening the belts a bit more. Tightened about 3 teeth more, which was pretty damned tight. This looks rather bad. Over 4 x the strength of vibrations and a much wider frequency range. This absolutely would have an impact on print quality.
Needed to print a part as my motor mounts are being bent out of shape from belt tension. So more testing after I get that resolved.