Trying to find a quieter 24v PSU I have managed to get the mechanism of my CoreXY printer nice and quiet through the use of 0.9 stepper motors and so on, but this has emphasised the noise that my 24v PSU makes - it's really annoying. The PSU is the usual Chinese LED type, 24v at 15A, and it works really well apart from the fan noise. Are there any reasonably priced PSUs available with that sort of rating, that don't make so much noise? The only alternative is to take the casing off (the PSU is in an enclosure so risk is very low) and directing a bigger, slower fan at the hot bits. Alternatively I could use a quiet axial fan and duct the air to the right place. But really I'd like a simple off-the-shelf solution, if there's one available. Any suggestions? https://reprap.org/forum/read.php?1,788832,788832#msg-788832 Tue, 19 May 2026 03:11:10 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,788832,788998#msg-788998 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788998#msg-788998
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DjDemonD
Well then you do have an option.

Use the Xbox psu for everything except the bed.
Get a 200w 24v psu for the bed these are usually fanless.

It's a thought - but the XBox psu is 12v, and everything in my machine is 24v... it's an avenue worth exploring though.

Of course, I could abandon the 24v bed heater and go to a 240v mains-powered one via an SSR, allowing me to use a much smaller non-fan PSU but that would be a whole lot more complication to ensure that it's safe. A lot more money too...

I might just try the 'quiet snail blower' route, to replace the PSU's noisy and inefficient fan. If that doesn't work out I'll try the mains-powered route.]]> David J General Wed, 20 Sep 2017 09:43:56 -0400 https://reprap.org/forum/read.php?1,788832,788952#msg-788952 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788952#msg-788952
Use the Xbox psu for everything except the bed.
Get a 200w 24v psu for the bed these are usually fanless.]]> DjDemonD General Wed, 20 Sep 2017 03:49:05 -0400 https://reprap.org/forum/read.php?1,788832,788949#msg-788949 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788949#msg-788949
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DjDemonD
If you're using mains/line for the bed a laptop style fanless psu is plenty for hotends/fans/motors 120w should do it 150w if you want a little headroom. I've two machines with laptop type PSUs for everything except the bed and they function very well. On my kossel Xl I printed a top cover for the psu with a lot of holes in it as it's sits in the electronics compartment under the bed, which is cooled by 2x 50mm fans separately.

My new hotbed is 200W on its own, without considering the hotend and other requirements! I'm going to need at least a 360W supply, preferably a little higher.

I do have an absolutely silent XBox PSU that I tried to use for supplying a printer - it was fine until the 120W Mk3 heatbed turned on, at which point the protection circuits tripped and the PSU shut down. The total current was just over the PSU's capabilities. I might still use that for something else though.]]> David J General Wed, 20 Sep 2017 03:06:27 -0400 https://reprap.org/forum/read.php?1,788832,788929#msg-788929 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788929#msg-788929 DjDemonD General Tue, 19 Sep 2017 19:24:37 -0400 https://reprap.org/forum/read.php?1,788832,788919#msg-788919 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788919#msg-788919
I got mine from RS online in the UK. They have most of the Meanwell range listed under the RS-PRO brand. This looks bit of a steal for the price if it supplies enough amps for you.]]> richw General Tue, 19 Sep 2017 17:45:33 -0400 https://reprap.org/forum/read.php?1,788832,788892#msg-788892 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788892#msg-788892
My case is a bit different in that I'm using separate PSUs for the hotend and the bed. My 300x300 bed draws quite a bit during initial warming but stays at a comfortable draw of ~4A once it reaches temperature. If i was using a single 24V PSU I might be able to get away with it since the hotend doesn't heat until the bed reached initial temperature.]]> tgmorris99 General Tue, 19 Sep 2017 14:53:48 -0400 https://reprap.org/forum/read.php?1,788832,788850#msg-788850 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788850#msg-788850
I'll look into the MeanWell range - I am powering the heatbed from the PSU (I'm just upgrading it to 200W, so that will need around 8.5A on its own), so I guess that load, plus around 2.5A for the hot-end and a few Amps for everything else means that I will need around 12A, maybe a little more for comfort. This nudges the limit on the old PSU, so maybe I do need to look for something better!]]> David J General Tue, 19 Sep 2017 09:59:56 -0400 https://reprap.org/forum/read.php?1,788832,788837#msg-788837 Re: Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788837#msg-788837 www.ebay.com]

I've put two of them into printers so far and they've been very reliable. MeanWell's stuff usually has multiple safety certifications which means they have some protection circuits that have been demonstrated to be functional.

Those so-called "LED power supplies" sold on ebay are junk. I'm pretty sure the fan is there to tell you that the supply is about to fail, because back when I used to use them, if the fan turned on the supply was usually dead a few minutes later.]]> the_digital_dentist General Tue, 19 Sep 2017 06:51:16 -0400 https://reprap.org/forum/read.php?1,788832,788832#msg-788832 Trying to find a quieter 24v PSU https://reprap.org/forum/read.php?1,788832,788832#msg-788832
Are there any reasonably priced PSUs available with that sort of rating, that don't make so much noise?

The only alternative is to take the casing off (the PSU is in an enclosure so risk is very low) and directing a bigger, slower fan at the hot bits. Alternatively I could use a quiet axial fan and duct the air to the right place. But really I'd like a simple off-the-shelf solution, if there's one available.

Any suggestions?]]> David J General Tue, 19 Sep 2017 06:32:13 -0400