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Semi Circular Anycubic 4Max Fan Duct

by Sp4wN Apr 4, 2018
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Hi. I saw your all fan ducts. Which one would you recommend for stock blower fan? And do your ducts are better than stock one ?

I am using the 85mm round one, it works best with bridging. Stock works too but not as affectieve as the models I made. Just print and test, see for yourself, specially with models that have small points sticking out, if not cooled properly the nozzle will hit the print or your bridges will hang.

very nice - thank you
Would it be possible for you to remix it for a 20mm instead of the existing 15mm wide fan?
1) I've got one from Sunon lying around ;-)
2) This would possibly allow to run the fan at a lower speed and thus lower noise
Or would the extra 5mm not fit in the 4Max?

Hi, I am glad you like it, but you guessed right, there is no room for a 20mm fan unfortunately I already checked that, it will bumps in to the left X carriage even before hitting X end stop switch. I can't check again right now since it is printing, but I will when it finnishes to make sure.
There is a version for 25mm fan here on Thingiverse, but that is held with zip ties and I don't like that idea, I want solid solution.

The thing is the X carriage is very limited on 4Max when it comes to make nice things for it, for example I tried to make a Dial Gauge holder for bed leveling and after 4 tries I give up, it is almost impossible, first you need long extenders for the gauge and than mount it so it wont hit the 2020 frame and top enclosure.

Just had a closer look by myself - a 20mm fan will not fit :-(

Do you have any experiences, whether it makes sense to replace the stock fan by e.g. a Sunon.
I want my Printer as silent as possible, because it will stand and work next to the sleeping rooms of the whole family.

I ordered a Sunon Fan but it is in back order till june =/

But the biggest noise sources are the power supply fan, the main board fan and hot end cooling fan, I already replaced the main board fan, hot end fan and I am getting ATX power supply, I don't trust OEM power supply anyways, check my posts on FB Anycubic support group, I also replace the stepper drivers to TMC2808, we also sleep next to my hobby room and the only thing we hear was the stepper motors, the TMC2808 made really big difference. I also used some sound demping under the printer, otherwise it was resonating when printing small pieces.

My printer is near silence now, only noise is from the power supply fan when it kicks in, but we don't hear that in bedroom.

TMC2808 Upgrade:
Later I also replaced the Z stepper driver.

The fans:

See the pictures here for the sound damping under the printer:

TMC2808 are already installed on X, Y and Z
Noctua NF-A4x20-FLX and be quiet! BL038 will arrive tomorrow
The be quiet will be used for the mainboard and I'm also working on an ATX PSU, which was a leftover from an old PC

Nice, I am getting 2x 30A rail ATX PSU, just for a second printer spare rail. If I ever get another printer it will be ready.