extreme noise at 85-105mm/s
Vcore 400. extremely noisy at 85-105mm/s default manual movements. No issues at lower or higher speeds. Gets worse with more belt tension, nearly gone with next to no tension. Also goes away at slower speeds.
What I did so far:
Reassembled the toolhead, retightened all the screws: reduced the noise a bit as some screws were loose.
Hold the bltouch needle in place while moving the machine: kills a single frequency in the cacophony - bltouch is rattling a bit.
Removed part cooling fans - no change.
Removed hotend cooling fan - no change
Removed extruder - no change
Loosened and tightened the idler stacks in the front and on the x axis - no change
I am running out of ideas.
Any ideas?
37 Replies
ambitious-aquaOP•13mo ago
Faster moves are fine:
ambitious-aquaOP•13mo ago
isn't this just the "forbidden zone" of 2209 drivers?
Anyways, check where this comes from (directly at toolhead/steppers/board etc.)
Check if you have the correct drivers configured in RATOS.
Try the stealthchop config for drivers, see if the noises dissappear
ambitious-aquaOP•13mo ago
Stealthchop does indeed make it disappear. I wasn’t really able to find a source. Seems to be coming from the toolhead but it’s hard to pin down as the frame transmits the noise everywhere. What’s the forbidden zone?
its simply the resonance frequency of your frame / printer. You can confirm this by using something similar to Klippain shake & tune. Its basically belt and input shaper which are already part of RatOS, but it adds some nifty feature to test resonances at different speeds and gives you a graph. You can then use that to avoid these speeds in your slicer settings, and use the nearest silent ones.
ambitious-aquaOP•13mo ago
I was able to fix it by a combo of finding loose screws, reducing belt tension and switching phases on one of the xy-steppers
it's now way quieter
Do you happen to have a link with more info on the switching phases on one of the xy-steppers?
what can sometimes help (especially in awd) is setting the steppers in sync by disengaging steppers, loosening the toothed idlers on each stepper and engaging stepper motors. Fasten idlers again. This helps reduce noise when they run synchronised
ambitious-aquaOP•13mo ago
That may be the mechanical way of what I did 😄
https://discord.com/channels/582187371529764864/844167067757182980/998324814509002944
is this the first time I hear of this lmaoi have that same 60-100 noise, these are mine.
So reverse one stepper or both? thats not quite clear
ambitious-aquaOP•13mo ago
They talk about reversing only one. Don’t forget to reverse it in the config as well or weird stuff will happen 😄
yeh of course, and reading the entire thread, you can actually do both or even do them all.
I'll post another pic in a minute ...
ambitious-aquaOP•13mo ago
drumroll
its absurd ... I barely hear the printer
ambitious-aquaOP•13mo ago
Did you switch one only?
Both. And to be clear, its not the same as syncing them. You could try that as well might even bring it down some more.
ambitious-aquaOP•13mo ago
How do you go about that, exactly?
Might be worth it to switch the other one as well then… 😄
Disengage stepper motors
then loosen the toothed idlers from the stepper axles
engage the motors
fasten the toothed idlers again
thats it. It ensures the steppers are synchronized and are stepping at exactly the same time
Before you freak out look at the scale
and I only did up to 200
ambitious-aquaOP•13mo ago
How do you engage them without homing?
Just set center kinematic position?
same menu, three buttons in the toolhead
ah wait ...
ambitious-aquaOP•13mo ago
Hmkay
haha
I think I homed and manually triggered the end switches
or theres a G-code command for it
ambitious-aquaOP•13mo ago
Set center kinematic position macro should work
yeh good one
ambitious-aquaOP•13mo ago
I don’t have Endstops 😄
xD
ambitious-aquaOP•13mo ago
Looks way better
im redoing it with the same settings and plugs back to the way they were
did it work with kinematic center?
this shows the info I was talking about
sorry it wasnt, wrong file
ambitious-aquaOP•13mo ago
I‘m currently busy with baking Christmas snacks 😄
No time for the rat rig
😄
Tinkering will commence this evening
ambitious-aquaOP•13mo ago
Currently switching from Eva 2 to Eva 3
And this is exactly the same test only with the wires back in the original position
ambitious-aquaOP•13mo ago
That‘s an insane improvement
I thought I had done this wire-swap but apparently not. My resonance (an enclosed 400) was at around 160mm/s.
Tested with G1 X5 Y5 F9500 and then G1 X395 Y395 F9500 and it sounded like I had replaced the printer with a plate-compactor (construction equipment)..
I had noticed some weird sounds occasionally but I rarely run the printer that slow so i didn't really bother to fix it for almost 2 yars, until now when I have to print a ton of tiny detailed objects with high resolution and the surface was "wawy" because it was running at or around this specific speed all the time..