Prusa Mini hotend fan noise  

RE: Prusa Mini hotend fan noise

I've realised that you can't really hear how high pitched and loud the fan is  - but it's noticeably annoying when in the same room. I don't recall it being this bad before - but I have just moved it to a different room and haven't used it for a few weeks.

RE: Prusa Mini hotend fan noise

Check to see if loosening or tighening the screws lessens the noise.  

RE: Prusa Mini hotend fan noise

Posted by: @cwbullet

Check to see if loosening or tighening the screws lessens the noise.  

Doesn't seem to have made any difference , but thank you for the suggestion.

RE: Prusa Mini hotend fan noise

Had a similar noise issue with print fan and eventually just replaced it. It's quiet again.

RE: Prusa Mini hotend fan noise

@tammets

Sometimes fan noise is the screws being too tight.  

RE: Prusa Mini hotend fan noise

Posted by: @cwbullet

@tammets

Sometimes fan noise is the screws being too tight.  

Agree and tried that too but after removing an old fan it turned out that fan paddle wheel was too loose. Couldn't see any other workaround than replacing whole fan.

RE: Prusa Mini hotend fan noise

@tammets

That would do it.  

RE: Prusa Mini hotend fan noise

@tammets

I had a similar problem with the original Prusa fan. The fan wheel had too much backlash and partially touches the case. The fan wheel shaft rotates in a slide bearing and is secured at the back, under the sticker with a circlip and a spacer. I removed these parts and printed a bushing with diameter 4x2, 4mm long, and glued it to the shaft. Afterwards a drop of oil and the fan runs again as usual. Alternatively you can change the fan of course and hope that it runs quietly for a long time.

RE: Prusa Mini hotend fan noise

What % do you have the cooling set to? What filament are you printing? and if the printer is off, and you manually spin the fans, do they spin freely?

RE: Prusa Mini hotend fan noise

Posted by: @same-old-shane

What % do you have the cooling set to? What filament are you printing? and if the printer is off, and you manually spin the fans, do they spin freely?

I have never changed that setting - looks like it is "Always On" and running at 100%?

I have Auto cooling set as well, but it doesn't seem to change at all; the fan whine seems pretty consistent

RE: Prusa Mini hotend fan noise

Posted by: @tammets

Had a similar noise issue with print fan and eventually just replaced it. It's quiet again.

My newly delivered mini has a bad hotend fan its so noisy and high pitch squeal, Prusa are sending replacement one to me. My question is it looks simple to replace can it be done without upsetting the PINDA and hotend, can it sort of slide out and then slide new one in and then just deal with a wire harness ?

RE: Prusa Mini hotend fan noise

@raymate

https://help.prusa3d.com/en/guide/how-to-replace-a-hotend-fan-mini_120913

RE: Prusa Mini hotend fan noise

@raymate

I have the same issue.  Noisy fan perodically.