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MK4 Factory Assembled - Bad Bearings?  

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Jeremy
(@jeremy-3)
Trusted Member
Topic starter answered:
RE: MK4 Factory Assembled - Bad Bearings?

 

Posted by: @iftibashir

So no internal changes, just a small cover change that helps faster manufacturing apparently. 

Noise was down to a faulty batch of motors. 

https://www.reddit.com/r/prusa3d/comments/13jjk9c/quick_update/

Unfortunately that's just PR speak.  It's easy to call any change an enhancement for efficiency but there was/is more to it than that.  Regardless of if they want to say - we messed up and didn't recognize an issue pre-production or not is fully up to them at this point.

Opublikowany : 17/05/2023 10:53 pm
iftibashir polubić
kevman
(@kevman)
Estimable Member
RE: MK4 Factory Assembled - Bad Bearings?

do you have details on what hte more was? they mentioned a bad batch of motors as well...

Posted by: @jeremy-3

 

Posted by: @iftibashir

So no internal changes, just a small cover change that helps faster manufacturing apparently. 

Noise was down to a faulty batch of motors. 

https://www.reddit.com/r/prusa3d/comments/13jjk9c/quick_update/

Unfortunately that's just PR speak.  It's easy to call any change an enhancement for efficiency but there was/is more to it than that.  Regardless of if they want to say - we messed up and didn't recognize an issue pre-production or not is fully up to them at this point.

 

Opublikowany : 18/05/2023 1:58 pm
shledge polubić
admin4life
(@admin4life)
Member
RE:

I am having a similar issue. The video does not really convey how loud it is but here is a link. 

Mine is also a factory pre-built.

https://www.youtube.com/shorts/Zq_MnJKj428

Opublikowany : 28/05/2023 1:50 pm
Cloud1983
(@cloud1983)
Estimable Member
RE:

This are not the bearings. I had the same problem with my first mk4. In my oppinion, this are virbations they come from the planetary gear. I know, Josef Prusa said some Printers are louder than expected because they think it are a bad batch of Motors but they don`t. The Motors are not the guilty. 

My new Mk4 makes this vibrations a littlebit too. 

Can I ask you?  Do you have the printer with the 3 or 4 Screws on the Prusa logo?

Send back the Printer for exchange a new one.  

Posted by: @jeremy-3

Received my new MK4 and notice what sounds like a bad bearing.  Anybody else with similar issue?  If so, did you get support?  I'm in the queue of over 54 minutes...

Video attached with sound...

IMG_2075

 

Opublikowany : 30/05/2023 4:57 pm
Eel River Coral
(@eel-river-coral)
Member
RE: MK4 Factory Assembled - Bad Bearings?

I will have to take a video as I have experienced this same noise in similar situations to user Jeremy-3. I can sometimes mitigate it by putting more tension on the belts by hand, but actually tightening them didn't solve it and the sound is not coming from my belts. I think I am just able to dampen the vibration by doing that I suspect. Mine is a factory assembled MK4 as well.

Opublikowany : 31/05/2023 3:34 pm
cwbullet
(@cwbullet)
Member
RE: MK4 Factory Assembled - Bad Bearings?

Have you contacted support via chat?

--------------------
Chuck H
3D Printer Review Blog

Opublikowany : 31/05/2023 4:57 pm
Cloud1983
(@cloud1983)
Estimable Member
RE:

yes. The Support said i should send the Printer back and I become a new one. And now i have a new one. The Noise was a Little Bit at the new one but very minimal and very quiter and the new Alpha FW it was to 99.5% gone. 

Opublikowany : 31/05/2023 6:39 pm
Andrew
(@andrew-15)
Member
RE: MK4 Factory Assembled - Bad Bearings?

I experienced this issue with my Mk4, and after investigation, have found the source and applied an effective fix.

Source: Bearing mounts in the extruder housing use rubber pads. These rubber pads seem to cause either a loose fit, resonance, or both, resulting in extremely loud/rattly x-axis movements, especially on the first layer.

Fix: The bearings need to be more tightly mounted in the extruder housing. To do this, disassemble the bottom bearing clamp, remove the breakout board cover, remove the long screw for the cable guide, and remove the back plate clamping the top x-axis bearing. Apply one wrap of electrical tape around the bottom two x-axis bearings, and two wraps of electrical tape around the top x-axis bearing. Reassemble the extruder housing.

This has completed eliminated the rattling noise for me and the printer is now as whisper-quiet as my Mk3S+

Hope this helps.

Opublikowany : 14/06/2023 4:10 pm
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