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Fanless power supply
Posted by msaeger
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Fanless power supply August 02, 2015 08:23PM |
Registered: 8 years ago Posts: 430 |
I am trying to make my printer quieter and the fan in the power supply is pretty loud. I would just replace it with a better fan but it's a 16v fan.
I would like to get a new power supply that is fanless. From reading the wiki I am thinking I should have a 30 amp one because I have a heated bed. Let me know if I am wrong about needing 30 amps because there are lots of 20 amp ones.
Can anyone point me to a fanless 30 amp power supply. I found one on aliexpress that calls itself rainproof but I would like more options. I have mainly been looking at the switching LED ones so I can still mount it on the frame like the current one.
Edited 1 time(s). Last edit at 08/02/2015 08:25PM by msaeger.
Newbie with Folgertech 2020 i3.
I would like to get a new power supply that is fanless. From reading the wiki I am thinking I should have a 30 amp one because I have a heated bed. Let me know if I am wrong about needing 30 amps because there are lots of 20 amp ones.
Can anyone point me to a fanless 30 amp power supply. I found one on aliexpress that calls itself rainproof but I would like more options. I have mainly been looking at the switching LED ones so I can still mount it on the frame like the current one.
Edited 1 time(s). Last edit at 08/02/2015 08:25PM by msaeger.
Newbie with Folgertech 2020 i3.
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Re: Fanless power supply August 03, 2015 01:43AM |
Registered: 10 years ago Posts: 14,672 |
If your printer has a standard 12V 10A heated bed such as the Mk2 or Mk3, then 20A is enough, although I use 25A to have some more margin and to support dual extrusion. No need to go to aliexpress, in many countries you will find plenty of LED/CCTV power supplies on your local ebay. You will need to guard the mains terminals and provide strain relief for the cables. I use a printed box for this, see [www.thingiverse.com].
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Fanless power supply August 03, 2015 07:56AM |
Registered: 8 years ago Posts: 430 |
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Re: Fanless power supply August 05, 2015 07:34AM |
Registered: 8 years ago Posts: 396 |
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Re: Fanless power supply August 05, 2015 07:59AM |
Registered: 11 years ago Posts: 5,780 |
While you're at it, why not replace those potentially unreliable fuses with wire jumpers?
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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Re: Fanless power supply August 05, 2015 09:51AM |
Registered: 10 years ago Posts: 770 |
Im with you its stupid getting rid of safety items. I tried running mine without the fan on for a test (also looking to quiet it down) and mine got quite hot running a few hours.Quote
the_digital_dentist
While you're at it, why not replace those potentially unreliable fuses with wire jumpers?
Im also looking into mounting a quiet 80mm or 92mm fan on the PSU to keep it cool but also quiet it down. Mine sounds like a harrier jet is taking off in the computer room.
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Re: Fanless power supply August 05, 2015 09:58AM |
Registered: 10 years ago Posts: 814 |
I've been using a 220W 18A 12V Dell USFF DA-2 Power Brick on one of my Funbot Printers. It uses a MK3 Heatbed and a 40W Hotend Cartridge. I only use it for PLA printing, so Bed isn't heated over 60C for extended times. I have heated it to 90C as a test though. I'm not sure how long it will hold up, but it's been running for a few months now. It is quiet though...
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Re: Fanless power supply August 06, 2015 12:36PM |
Registered: 8 years ago Posts: 396 |
So riddle me this batman.
if the above black power supply has no fan, how is it considered unsafe to remove the fan if it is known the unit is not exceeding safe temperatures without it? Probably has some better heat sinks... I'll have to take a look...
Edited 1 time(s). Last edit at 08/06/2015 12:36PM by thetazzbot.
if the above black power supply has no fan, how is it considered unsafe to remove the fan if it is known the unit is not exceeding safe temperatures without it? Probably has some better heat sinks... I'll have to take a look...
Edited 1 time(s). Last edit at 08/06/2015 12:36PM by thetazzbot.
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Re: Fanless power supply August 06, 2015 01:25PM |
Registered: 11 years ago Posts: 5,780 |
The power brick in the photo is designed to be operated without a fan. The power supply that has a fan is designed to be operated with the fan if not all the time, when it heats up under load.
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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Re: Fanless power supply August 06, 2015 03:16PM |
Registered: 10 years ago Posts: 770 |
Correct. Dont believe me then take the fan out like I did for a little and you will be very surprised how hot it gets. These PSUs need a fan.Quote
the_digital_dentist
The power brick in the photo is designed to be operated without a fan. The power supply that has a fan is designed to be operated with the fan if not all the time, when it heats up under load.
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Re: Fanless power supply August 06, 2015 09:39PM |
Registered: 8 years ago Posts: 430 |
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Re: Fanless power supply August 07, 2015 07:36PM |
Registered: 8 years ago Posts: 396 |
Yes removing "safety" equipment is not wise so you should put those gaurds back on all your tools.
Ive been running the psu with no fan since i bought it and i have never felt it get warm. But i use a bench powersupply now anyway. I dont like exposed terminals. Hows that for "safety"? Ironic isnt it...
Ive been running the psu with no fan since i bought it and i have never felt it get warm. But i use a bench powersupply now anyway. I dont like exposed terminals. Hows that for "safety"? Ironic isnt it...
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Re: Fanless power supply August 07, 2015 07:57PM |
Registered: 11 years ago Posts: 5,780 |
Why don't you 3D print a cover for the terminals?
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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Re: Fanless power supply August 10, 2015 09:24PM |
Registered: 8 years ago Posts: 396 |
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Re: Fanless power supply August 14, 2015 02:58PM |
Registered: 11 years ago Posts: 471 |
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Re: Fanless power supply August 14, 2015 09:09PM |
Registered: 8 years ago Posts: 430 |
Quote
epicepee
You could probably get a big, quiet fan, and print a funnel adapter to cool the PSU. Or use a squirrel-cage blower at low speed.
Yeah I was thinking that too but then I would need to run it off the 12V or drop down the 16V somehow. But then I think if I could get a new one for 20 or 30 bucks I would rather just do that but I still haven't really found the right one so I may just end up doing the bigger fan.
Newbie with Folgertech 2020 i3.
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Re: Fanless power supply August 15, 2015 12:20PM |
Registered: 8 years ago Posts: 396 |
Ibran my printer today on the reprap powersupply without its fan. The label on the ps says fan will come on when temps require it.. So the original fan was crap and has a bad bearing so i took it out. I used my temp gun and it read 100 on the al. case. Running both gotend and heatbed for several hours
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Re: Fanless power supply August 15, 2015 12:55PM |
Registered: 8 years ago Posts: 396 |
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Re: Fanless power supply August 15, 2015 02:38PM |
Registered: 11 years ago Posts: 5,780 |
Contactless IR thermometers are a poor way to measure temperature of anything but the type of thing they were calibrated against, usually a flat black surface. Everything else will read incorrectly.
The temperature of the PS case is always much lower than the temperature of the semiconductor junctions that the fan is intended to protect.
If you knew the fan had a bad bearing, then it must have turned on (how else would you know the bearing was bad except to hear it running?), meaning the PS was getting hot enough to trigger it.
You're running on borrowed time. Good luck.
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
The temperature of the PS case is always much lower than the temperature of the semiconductor junctions that the fan is intended to protect.
If you knew the fan had a bad bearing, then it must have turned on (how else would you know the bearing was bad except to hear it running?), meaning the PS was getting hot enough to trigger it.
You're running on borrowed time. Good luck.
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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