Solutions for a non PWM (2 pin) 2510 24v Fan

Phaedrux

And you get a lot more options if you include 12v fans.

https://www.digikey.com/products/en/fans-thermal-management/dc-brushless-fans-bldc/217?k=&pkeyword=&sv=0&pv46=40580&sf=0&FV=ffe000d9%2Cfffc0103%2C38007e%2Cc580009&quantity=&ColumnSort=0&page=1&pageSize=25

zapta

@jwalbridge said in Solutions for a non PWM (2 pin) 2510 24v Fan:

There is even a dedicated FAQ entry on the SliceEngineering web page stating that this fan is overpowered and to run it at 70% power for most applications

@jwalbridge, I wonder, are the complains mostly from 24V users or also from 12V users? Considering the wider availability of 25x25 12V fans, I wonder if the fan problem is 'solved' for 12V users.

jwalbridge

@zapta I've got a couple different 2 pin 24V 2510 fans on order to try out. With my experience, all the fans on my 12v printers have been quieter than their 24v counterparts. These were all 30mm fans on E3DV6 hotends. I guess there just isn't much of a market for 25x25x10 at 24V.

@Phaedrux The mouser fans would probably fit, at the cost of a few MM on my X axis. Looks like they are 5V. Maybe I should just use a buck converter to open up my fan options.

Phaedrux

@jwalbridge said in Solutions for a non PWM (2 pin) 2510 24v Fan:

Maybe I should just use a buck converter to open up my fan options.

Might not be a bad idea. It's much harder to find decent 24v fans than it is 12v.

If you could make a larger 30mm fan fit somehow, this fan is an excellent option: https://www.digikey.ca/product-detail/en/sunon-fans/MC30101V1-000U-A99/259-1550-ND/2757778

zapta

@jwalbridge said in Solutions for a non PWM (2 pin) 2510 24v Fan:

Maybe I should just use a buck converter to open up my fan options.

You probably know it but just in case ;-), you can find here information how to connect a 12v fan to a 24v duet. The input of the buck converter should be connected to the 24V power supply, not to the the fan output of the duet.

Veti

@jwalbridge said in Solutions for a non PWM (2 pin) 2510 24v Fan:

6-25Hz

i read that at khz.

have you actually tried 6-25khz?

noisettetbou

Hello. Have you founded a solution ? Because I've buyed a Mosquito and got the same problem.

fcwilt

I've got a Mosquito with a 12 VDC fan and it works just fine.

I would be surprised that a 24 VDC unit would be that much different.

Frederick

mwolter

@noisettetbou I have a mosquito with a 24v fan and have the same issue. I’ve heard adding a capacitor across the positive and negative wires of the fan helps smooth the PWM so the fan can run at lower PWM values. I’ve seen recommendations of 22uf and 47uf capacitors. Are there any issues caused by doing this? Should I be concerned with inrush current?

kolja

running 3x 25x25x10 gostime 24v fans on my smarteffector with e3d v6. during last weeks tried several things to calm it down. long story short:

25x25x8 ebm pabst 252 n/h (quiet expensive - 22EUR, absolutely quiet, 12v with buck-converter) don't deliver enough pressure to cool heatbreak enough (v6 fins mean a lot of static counter pressure - might be different with mosquito)

for better comparison:

2 gostimes at 24v for filament-cooling press 2-3mm deep holes into water surface (glass below hotend)
2 gostimes at 12v are much quieter and less turbulent, but only scratch the water surface
25x25 pabsts just scratch surface
40x40x10/20 noctua just scratch surface

my solution right now: got a cheap buck converter via amazon bringing my voltage down from 24 to 20v. decreases airflow to a just acceptable level while decreasing noise and vibrations quite a bit.

airflow is one thing. getting that lot of air through a tightening channel or along obstacles in the way requires air-pressure (the anti-pressure to overcome is a reason for vibrations and noise). axial-fans are not good in that regard. pressure increases with revs. the ebm pabsts turn with 9(N - absolutely quiet) to 12(H - less quiet) thousand rpms. the gostimes in comparison can do up to 24.000 rpm (quiet noisy - but lot of flow in comparison).

https://www.ebmpapst.com/de/products/compact-fans/axial-compact-fans/axial_compact_fans_detail.php?pID=53709

http://gdstime.com/product/?99_471.html

the gostimes - even on full speed - can run comparably quiet. high pitch like a turbine. but as soon as they blow against an obstacle that blocks their way, the sound changes from a steady, quiet, high-turning turbine to a vibrating rattler.

might at least to some new ideas.