Horrible Frequency on the XL
The Prusa XL, after coming from the MK3S+ and Prusa Mini+, is without a doubt much louder.
I was fine with the sound, since it was a sound of a working machine and not an annoying frequency.
After 350h+ of Printing, the XL started to change in sound.
It got that extreme, that I'm worried about damaging the printer by running it.
Its an awful tune of frequency the printer hits, when printing mostly slower (Outer surface) and X & Y is in combination.
Printing and moving fast isn't an issue at all.
- Checked all screws 2x
- Lubricated the Linear Rails after contacting the support (2 years warranty?)
- Removed the Metal Covers to reduce Noise
- Checked and had to slightly adjust belt tension
Tried to record the sound, guess the IPhone Speaker can not catch or handle the high frequency so good.
Yet you can hear, that the from time to time when he moves 2 axes at the same time, the sound increases.
The Printer is placed on an massive Wooden Table which is 80mm thick, in the basement.
However, I can not run the printer during the night anymore, the sound level is so high, that its easy to hear during 2 floors and 2 closed doors.
Has someone a good explanation for this?
I've tested quite a bit and the source seems to come from the 2 Motors next to my 5 Toolheads and in the Nextruder itself you feel heavy vibrations.
Tested with this procedure ->
Before the latest Firmware it seemed to be better, maybe this is something I have to check too
Would greatly take any advice, which is not cosmetic like foams to absorv the noise.
But to kill the source also for the sake of the lifetime of the Printer. (4K $ with Tax btw...)
RE: Horrible Frequency on the XL
Are you using input shaping? I found with both the MK4 and the XL that vibration is greatly increased with the higher speeds. So much so I've gone back to the non-IS profiles.
RE: Horrible Frequency on the XL
Mine does since since the beginning (5.1.2 firmware). Depending of the speed, the X/Y motion system generates strong vibrations that let different parts of the machine to resonate. The extruder cover and LED strips are the most noticable, followed by all metal sheets.
I talked with the support, but they weren't that helpful except directing me to youtube where another user described his efforts to dampen those vibrations. For a machine of this price I had hoped that the support would be acknoledging the issue, and promising to get rid of the vibrations.
They even suggested I may modifiy the gcode to exclude certain speeds. Well, I'm not going to modify every gcode I slice.
I used the machine this input shaping from the beginning. So I don't know whether the firmware made a difference to previous ones.
I really hoped for a more silent printer after my MK2.5S, but that's not the case. Those resonances really annoy me.
RE: Horrible Frequency on the XL
yeah, it's much noiser than my two MK4 printers. Even without the inputshaping. I agree, the resonance is annoying.
RE: Horrible Frequency on the XL
Alright short update about this topic:
Re-greased the linear bearings (X&Y) with MOTOREX FOOD Grease CS-HD 2.
The bearing inside, not the rail
Video for reference:
Friend of me is working in the automation segment and they use them a lot with good durability and noise reducing effect.
Besides:
Firmware 5.1.2
Slicer 2.7.1
Material PETG
Slicer Profile 0.6 Nozzle, InputShaper (Default)
Speed Profile 0.25mm (Default)
Now after the first grease session with the new "optimized" one.
The Average DB came down to 59 was 73 before
Peak is now 70-73 and frequency is not shooting up so high anymore, still able to hear it but runs now on lower frequency. (Less painful)
So far quite an impact.
Will re grease after the print, due to the movement now, there will be more space to be filled.
Hence improve the noise reduction potentially.
Guess on the mechanical side, this is more or less about it.
Unless putting Foam all between, which I don't want to go over (4000 $ machine)
Will test further with different Firmware / Slicer Combinations.
RE: Horrible Frequency on the XL
You don't have to switch back to the non-input shaper profiles, because then you also do without Pressure Advance. It is sufficient to change the speeds and acceleration values to those of the non-IS profiles.
Are you using input shaping? I found with both the MK4 and the XL that vibration is greatly increased with the higher speeds. So much so I've gone back to the non-IS profiles.
RE: Horrible Frequency on the XL
Unfortunately, Prusa probably has a general problem with greasing moving parts such as bearings or rails. Even their linear bearings on the Mk4 are sometimes not greased. Even the support team once told me that the bearings on the Mk4 don't need to be greased, which is total nonsense.
Alright short update about this topic:
Re-greased the linear bearings (X&Y) with MOTOREX FOOD Grease CS-HD 2.
The bearing inside, not the rail
Video for reference:
Friend of me is working in the automation segment and they use them a lot with good durability and noise reducing effect.Besides:
Firmware 5.1.2
Slicer 2.7.1
Material PETG
Slicer Profile 0.6 Nozzle, InputShaper (Default)
Speed Profile 0.25mm (Default)Now after the first grease session with the new "optimized" one.
The Average DB came down to 59 was 73 before
Peak is now 70-73 and frequency is not shooting up so high anymore, still able to hear it but runs now on lower frequency. (Less painful)So far quite an impact.
Will re grease after the print, due to the movement now, there will be more space to be filled.
Hence improve the noise reduction potentially.Guess on the mechanical side, this is more or less about it.
Unless putting Foam all between, which I don't want to go over (4000 $ machine)Will test further with different Firmware / Slicer Combinations.