Rattling noise from hotend fan  

RE: Rattling noise from hotend fan

i do not belive the video has been attached try attaching it as a zip file

RE:

You are right, thank you for noticing. The video with the audible rattle can be downloaded here: IMG-8350

RE: Rattling noise from hotend fan

That is definitely the fan blades hitting something have you checked if it's clear of strands of fillament or it could be blades hitting the casing

RE: Rattling noise from hotend fan

The printer has just been assembled and it made this noise during the very first self-test. The rattling noise remains present even if I stall the fan with my finger.

RE: Rattling noise from hotend fan

please post video of the noise happining when its stoped with your finger video would help not just recording thanks

RE: Rattling noise from hotend fan

i would also contact prusa through the live chat as it could be a faluty fan

RE: Rattling noise from hotend fan

Hi, please update the thread if you get any answers as I have the same issue. Didn't even realize it was an issue before reading this post.

RE: Rattling noise from hotend fan

Hi there @ray-fields make sure the screws aren't to tight around the casing and does your noise still happen when you stop it with your finger 

Thanks look forward to hearing from you 

RE:

Here is a video of the Fan sound when the fan is not spinning (listen carefully towards the end of the video).

RE: Rattling noise from hotend fan

I had same thing, it was the heater/thermister wires that was too close to the fan.

Un-clamp the holder on top and wiggle -CAREFULLY- out 5mm or so more wire towards the hotend.

I used a small stick to finess "bend" then out of the fans way.

Then re-clamp on top.

RE: Rattling noise from hotend fan

But how would that cause any rattle when the fan is not rotating?

RE: Rattling noise from hotend fan

You are correct, it wouldn't. didn't catch that.

Just as a wildshot, do you use the supplied prusa silver usb with key-ring? Could it be that that's bouncing on the table?

RE: Rattling noise from hotend fan

Are you sure it's coming from that fan not the other one because it sounds like fan at about 10 percent ideling speed

RE: Rattling noise from hotend fan

Posted by: @hello

Are you sure it's coming from that fan not the other one because it sounds like fan at about 10 percent ideling speed

You could be right. After fiddling and trying to adjust the other fan the noise has indeed been reduced.

From the assembly manual it was hard to see how far down the part cooling fan had to be pressed. It appears that I might have squeezed it too far into the slot presumably causing the plastic to touch the rotating fan blades.

RE:

My fan on my brand new mk4 sounds like this  Support is telling me that's absolutely normal. 

Whereas every fan im using in other components sound like this.

Really pissed off at the moment. 

RE: Rattling noise from hotend fan

My Mini started to have that rattling sound as well.

Apparently the issue was the fan blowing at the nozzle ( the one on the back, and not on the side when looking from the front).

I waited till there is no printing at all and then I just turned cooling to 100 and gently pushed the fan center wheel with my finger and the rattling changed a bit. Just watch out not to touch the blades with your finger.

I did it few times and with every push it was rattling noticeably less, so I pushed it few times untill it stopped.

Not sure if there was something inside and it's gone now or maybe some loose fragments were too lose and now they are not. All in all it works and sound properly now.