Mean Well SP-480-24



  • I have a Mean Well SP-480-24 in use as a power supply for my Duet controlled HEVO, and it's doing well. However it is loud and the fans are on all the time. It's has an rc on/off function but I have seen a remark somewhere that mentions that using remote off doesn't kill the fans. I could replace the fans with quieter ones, but that will probably also reduce airflow.

    Does anyone here happen to have experience with this power supply, replacing fans or using the rc on/off function?



  • These supplies are great in terms of quality and reliabilty, but the fan noise is extreme with these models.

    I previously had a RSP-500-24 and the fan noise was the reason I switched to the Mean Well HLG320H which has a larger footprint, but is convection cooled with no fans whatsoever.

    In terms of replacing the fans, it can be done however, airflow is important and any changes are that you are going to make, if successful, could prove problematic. I don't recommend it. The remote on/off functions on these units are for the entire supply, not just the fans. The RSP (SP) line up are not ideal for this reason. The HLG series are a tad more expensive but worth it I think if you want something more reliable than a Chinese ungraded supply.

    I hope this helps.



  • That helps thanks. Those hlg series look nice, but I really need 480w minimum. I just sourced a psp-600-24 today. Is still has forced cooling, but only one, larger fan. I'm hoping that that larger fan makes less noise than two small ones.



  • I think that will work well enough, the larger diameter fans are generally quieter or at the very least the lower frequency of that sound will be far more tolerable. The HLG series does go up to 600W, however you are talking about £240+ for a 600W model. You can buy a decent printer for that sort of money nowadays 🙂 As long as its Mean-Well, you can be confident that it will last and be manufactured to a high quality! I've lost count of the number of cheap Chinese supplies that have failed on me, some have even went up in smoke without actually cutting off!



  • I'm using this:

    MAAS SPS-350-II - amateur radio power source (12-15v/30A)
    or same from Alinco
    not cheap but really good



  • @ar300:

    I think that will work well enough, the larger diameter fans are generally quieter or at the very least the lower frequency of that sound will be far more tolerable. The HLG series does go up to 600W, however you are talking about £240+ for a 600W model. You can buy a decent printer for that sort of money nowadays 🙂 As long as its Mean-Well, you can be confident that it will last and be manufactured to a high quality! I've lost count of the number of cheap Chinese supplies that have failed on me, some have even went up in smoke without actually cutting off!

    I got mine for a really good price, almost better than cheap Chinese ps. Fingers crossed



  • If it works out well, I'd love it if you'd let me know, I'm building another and would love to save a few bucks if possible



  • Hope to get it this weekend. I'll let you know.



  • If the thing is still too loud for you i would suggest to try a industrial power supply for example: Siemens Sitop series or an Phoenix contact Power supply.
    They handle fairly cheap as used ones on ebay.
    This units are far more skookum then the consumer ones and most of them are fanless.
    But you have to build your own enclosure for them. So if you will you can integrate noctua fans into it.



  • @S1lencer:

    If the thing is still too loud for you i would suggest to try a industrial power supply for example: Siemens Sitop series or an Phoenix contact Power supply.
    They handle fairly cheap as used ones on ebay.
    This units are far more skookum then the consumer ones and most of them are fanless.
    But you have to build your own enclosure for them. So if you will you can integrate noctua fans into it.

    Nice tip, however, still quite expensive for a used ps.

    I have been looking at the mean well range, and for my setup the hrp-600-24 looks like a nice, affordable, alternative. It has a temperature and load controlled fan.
    Worst case, my setup should draw max 490w, with steppers, heaters and fans drawing max power at the same time. However, this will likely not be reached during printing, as the power from the heaters will decrease once the set temperatures are reached (my current 480w power supply with forced cooling doesn't get warm at all). So during printing I will be around 50% of the 600w PSU's rating, which could be enough to keep the fan off.


  • administrators

    I presume you have a large bed heater on your printer if it needs such a large PSU. Using an AC mains voltage bed heater and SSR would allow you to use a much smaller PSU, but of course there are additional safety implications.



  • @dc42:

    I presume you have a large bed heater on your printer if it needs such a large PSU. Using an AC mains voltage bed heater and SSR would allow you to use a much smaller PSU, but of course there are additional safety implications.

    I have a fairly straightforward 300x300mm heated bed from AliExpress. Nothing special. I once measured the resistance, but don't remember what it was. Calculation ended up being somewhere around 380w for the bed if I recall correctly. From a cold start it takes almost 7 mins to heat the bed to 80c and the nozzle to 250c (nozzle after the bed reaches temp).

    Don't want to go the SSR route, I haven't dug in to it deeply. I leave my printer running unattended overnight, so I'd rather be safe.



  • @ar300:

    If it works out well, I'd love it if you'd let me know, I'm building another and would love to save a few bucks if possible

    I just received mine. Haven't installed it yet, but took it apart to have a look at the fan. It has a 80mm fan inside: Sunon KD1208PTB1.
    This fan's noise level is supposed to be 35dB, and displaces 69.7m3/h.


  • administrators

    About two months back when I was first commissioning my Duet WiFi I was reading about power supplies on the Wiki and dc42 had a note in there about how cheap power supplies fail more often or something to that effect. I thought "wow I must be lucky I have two of them that have been performing great!". Less than 2 days later I turned on my printer and POP something blew up and the whole thing shut down. Sure enough the power supply went out (never did figure out what popped as I took it apart and nothing had exploded…I was a bit disappointed). Fortunately I was able to swap in my "spare" but immediately started looking for a replacement.

    I settled on the relatively new and slightly more costly UHP-350-R it has no fans, is utterly silent, has remote voltage sensing, and a super attractive footprint. I have to say its been pretty awesome. I basically just leave my printer "on" most of the time now as it makes absolutely no noise whatsoever. I have to admit its really nice to not have the power supply fan increasing in volume every time I turn on LEDs, or as the hot-end heats up.

    Obviously 350 might not be enough umph for some people as I am using an A/C bed off mains behind an Opto22 and not a 24v bed, and currently am only running a single extruder; however I calculated that with dual extrusion, motors at full tilt, 4x the LEDs, 4x the fans, adding an LCD, two additional PT1000, and a DuEx expansion I would still be WELL under the 350W that this thing provides. Right now the damn thing doesn't even get much above room temperature during the course of a multi-hour high-temp (PETG/Nylon) print (in fact the printer is has been sitting idle but on for a day and its the exact same temp as if it had been printing non-stop).

    I purchased mine through Arrow since they had free overnight shipping but I found several other vendors as well, it cost me a bit more than some of the fan-cooled versions but to me the silence was worth the price. Picture of it mounted for reference:

    Just another option for those interested!

    -M


 

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