V-core-3 500mm stock with FMMM. Need some help.

First time setup. Trying to make sure I have this right. In general, I think it looks pretty good compared to the example I have seen Helge Keck show, but I am looking or some feedback on what, if anything I should do to improve it. The second peaks are not the same amplitude. Should I adjust the lower belt? Would it be tighter to increase the peak? I have seen that 125 Hz artifact on a lot of the other graphs. Is this just to be expected with the EVA3? Is there a way to run the resonance test in that frequency range continuously to see if I can find whatever might be loose?
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correct-apricot
correct-apricot2y ago
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correct-apricot
correct-apricot2y ago
Made a few minor tweaks. This is the current belt graph. I'll wait to see if anybody has any advice before I make things worse.
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correct-apricot
correct-apricot2y ago
Well, I keep working on this despite the lack of feedback. I did the FMMM mod. I don't think it made much difference in my case, though I really like the fact that I can actually see the belt path. These are the latest graphs.
I was able to identify the 125 hz issue I was previously having. The fan shroud for the 4028 was not completely secured against the back. I can't seems to get it to tighten all the way down, so I may need to get some kind of gasket in there. The gears in the LGX lite extruder are rattling as well. Sticking a piece of filament in and locking the lever seems to have helped with that. There is still some noise that I can't seem to get rid of. I could use some advice if anyone is willing. I'd really like to move to figuring out my bed mesh issue that I also posted about. Dying to actually start using this printer.
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wise-white
wise-white2y ago
belt tension not the same peak
Nebulator
Nebulator2y ago
Regarding the fan shroud against the backplate, I had the same issue. I considered a thin gasket but decided to grab some sandpaper to a really flat surface (stone kitchen worktop for example) and I sanded both down until they were perfectly smooth. also, I think the graphs look really good. If you manage to get that 125 Hz down a bit its even better but if not I wouldnt worry about it too much.
wise-white
wise-white2y ago
300 86-100 hz 400 66-75 hz 500 53-62 hz
correct-apricot
correct-apricot2y ago
Appreciate the responses. Unfortunately, I screwed up the frame alignment while trying to fix my bed mesh. I'm going to take it apart and start over. Hopefully the second time around I'll have better luck.
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