fix resonance
I'm still sharpening up on how to interpret, understand and fix resonance issues.
I just upgraded to 3.1, FMMM, extrusionless gantry, re setting up printer and getting some waviness in prints.
These don't look good/similiar to what I've seen.
Any help would be greatly appreciated!
18 Replies
looks like the blue line, Z to the ADXL, Y to the printer, has a resonance at very low frequency
and jagged edges
I tightened belts for A and B and have better results:
klipper automatically generated these settings, do they seem appropriate?
When running these resonance tests, I hear what sounds like belt slapping extrusion. The belts feal pretty tight to me but maybe need to go tighter? What's a good way to judge belt tension?
I think I need to decrease tension of 'upper'/yellow line. Does that make sense based on this plot?
And can deceasing tension reduce or remove belt slapping on extrusion?
This is what an ideal belt tension graph should look like so I'm guessing it actually wouldnt hurt to try and tension your lower belt a little tighter --if possible. I'm not an expert but that's my observation.
thanks, that's helpful.
I tightened both belts and have similar amplitudes now, but a third and forth hump that I'm not sure how to deal with
Hmm, that is odd. I'm gonna double check a couple youtube vids to see if I can find what that could be. Did it have any meaningful impact on your shaper graphs?
I don't think so? still have 3 humps in the y response, shown above
Looks like you picked up a couple thousand more!! So whatever you did is pointing to the right track.
couple thousand more? couple thousand whats?
Acceleration! Look at the top right boss!
I see
ran shaper_calibrate and got these values:
[input_shaper]
shaper_type_x = zv
shaper_freq_x = 63.8
shaper_type_y = zv
shaper_freq_y = 32.4
going to try running a print now and see if my 'vertical fine artifacting problem' goes away
https://discord.com/channels/582187371529764864/1147576937028530237