1 Topic by n2ri

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Topic: replacement power supplies for SD2?

I picked up a couple at yard sale for >50 cents each 1 300watt and 1 400watt. I was wondering if anyone has experiance on these. they are off computers with multi-plugs on harness some different on one than the other.

the 300watt is HIPRO of China model HP-D3057F3R with a green LED pilot light.

the 400Watt is Sun Cheer model SC-400 made in USA by the UL label and no chicken scrach letters hehe also has a color code list for wire loom outputs and an off/on toggle switch instead of pilot light.

if both are good I would prefer using the 400Watt as both are same size box and fan. just need help with what wires/connectors needed for my SD2 if I upgrade to a Rumba board etc. also planning to upgrade bed heater, duel E3D hotends with bodens, parts cooling fan and other fans for extruder motors if needed and 1 for the left hand carriage motor.

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

2 Reply by Ski52

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Re: replacement power supplies for SD2?

On a standard computer PS, there is one green wire in that mess that when jumped (shorted) momentarily to any of the black (ground) wires will either start or stop the PS. (thus the momentary switch on most computers for power on-off)  The Molex connectors are red - black - black - yellow - or 5VDC - GND - GND - 12VDC.  Don't know too much about the other wires.  Turn it off and on with the green wire, and the power comes from the white Molex connectors. 
Plug it in and get a meter....

Ski

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3 Reply by pirvan

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Re: replacement power supplies for SD2?

400W accounts for the total output (12V, 5V and 3.4V). 

Most labels will have a breakdown on the wattage supplied by each rail.  You only care about the 12V.  Additionally some power supplies (ATX2.1 and newer) have dual rails, so if you want to take advantage of the whole output, you'll have to use both rails.

Also, if these are ATX power supplies, the switch on the 400W will only act as a main power cutoff.  You still need to add a momentary switch to turn the PSU on.  Take a look at the ATX connector, you should see a green wire (pin 9) among a bunch of black ones.  That's the PS_ON wire.  To turn the PSU on or off, you need to ground that wire, so put a momentary switch between that green wire and one of the back wires next to it.

To print or, 3D print, that is the question...
SD3 printer w/too many mods,  Printrbot Simple Maker Ed.,  FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.

4 Reply by n2ri

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Re: replacement power supplies for SD2?

the 400watt Sun Cheer one says ATX on it and total output for +5V & +3.3V is 210W & only lists Amps on the others 15A on 12V.

the 300W Hipro only lists numbers in english says 175W for 5 & 3.3 then 268W for 12v.

so are these type power supplies OK or is there some other type better for this?
also any good or bad reviews on either of these makes? like fires etc.

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

5 Reply by n2ri

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Re: replacement power supplies for SD2?

the 300w also says 19A on +12v and it has a green wire to HDD plug. no green wire on the 400w but it has a power switch toggle. it dont have the 2 thin plugs the 300w has either and harnesses look complete and no cut ties or housing seals

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

6 Reply by carl_m1968

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Re: replacement power supplies for SD2?

Most printer supplies need to do at least 25 amps on the 12 for the heated bed and extrudes well as the motors. Unless you have a rare printer controller the 3.3 and 5 are not even used so their current is irrelevant.

Printing since 2009 and still love it!
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7 Reply by pirvan (edited by pirvan 2015-06-08 01:07:34)

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Re: replacement power supplies for SD2?

n2ri wrote:

the 400watt Sun Cheer one says ATX on it and total output for +5V & +3.3V is 210W & only lists Amps on the others 15A on 12V.

the 300W Hipro only lists numbers in english says 175W for 5 & 3.3 then 268W for 12v.

so are these type power supplies OK or is there some other type better for this?
also any good or bad reviews on either of these makes? like fires etc.

I've never heard of Sun Cheer.  Believe it or not, way back when (90's) there was a company called Sunny Happy that used to make I/O cards (serial/parallel port).  But no, never heard of Sunny Cheer.

On the other hand, HiPro is a well known brand, and while it's not as well known as Delta or CoolerMaster or Thermaltake, they OEM their power supplies to many companies.  So I wouldn't have a problem with it.

AS far as the wattage is concerned, the math is easy.  V * A = W.  However, the total output should add up.  The numbers you mention don't add up.  175 + 268 is 443W.  Yet the PSU is rated as only 300W.  Something is wrong there.  Do they specify how many amps on the 12 V Rail?  IF they do, multiply the Amp value by 12 and you'll get the total output on the 12V rail.

To print or, 3D print, that is the question...
SD3 printer w/too many mods,  Printrbot Simple Maker Ed.,  FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.

8 Reply by carl_m1968

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Re: replacement power supplies for SD2?

I usually just use the 12 volt brick style supplies as you can get them in nearly every wattage you need. Converted server supplies are excellent and supply 75+ amps at 12 volts. I have a small one going into my Delta that is only 8 x 1.5 x 3 and guaranteed to do 12 volts at 75 amps under full load. Honestly the issue with ATX supplies is you have to other voltages you don't need and some even require those other voltages to be loaded before they will even start up. They are easier to hide or enclose than an ATX is as well.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

9 Reply by n2ri

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Re: replacement power supplies for SD2?

cool, good input guys. yeah the Sun Cheer says "low noise temp controller so that means T stat for fan which can be a problem overheating.
the Hipro says 19A on =12v and 25A on +5v plus 16A on 3.3v so these cubes sound like not best choice for my use. I may just find something like Carl said. what do those type PS come on Carl? I have access to some electronics recyclers. both these PS I got sell for $20 and up on ebay which is odd and both where used on Dell desktops they look very similar with a couple small differences  the Hipro has more air vent space

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

10 Reply by n2ri

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Re: replacement power supplies for SD2?

only gave $1 for the pair so I can cannibalize em for parts at that price lol

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

11 Reply by carl_m1968 (edited by carl_m1968 2015-06-08 03:28:23)

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Re: replacement power supplies for SD2?

n2ri wrote:

only gave $1 for the pair so I can cannibalize em for parts at that price lol


These are what I used for my Delta. I just unsolder the banana plugs and added screw terminals. The one I got was 65 bucks but the output is server grade and made to last.

http://www.ebay.com/sch/i.html?_sacat=0 … amp;_frs=1

This is the exact one I used.

http://www.ebay.com/itm/12v-power-suppl … 27fc6b6cfb

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

12 Reply by n2ri

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Re: replacement power supplies for SD2?

dont need near that much power nor heat added in my printer inclosure or room. need a window AC just to keep room normal temp LOL power supplies create same watts of heat  in space being used. 1200 watts is 5,000 BTUs of cooling just to compensate. my career was HVAC facility engineer and the Phone company server buildings use inverters to maintain charge in batteries for operating equipment. the web server building MCI worldcom built in earth city, MO, has over 52,000,000,000 billion BTUs of cooling to compensate and only 20,000 BTUs heat for winter make up air for vents as no heat required in the 100,000 SqFt
building due to that. over 100 cooling units in a dozen different sizes plus 8 locomotive sized emergency generators each enough to power a city of over 5,000 population. so thats why your phone/internet bill is so high ;^)

only need 300w

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

13 Reply by grob

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Re: replacement power supplies for SD2?

n2 - it's only going to draw as much power as it needs. If the printer heaters, in worst case, draw 300W, then it's only going to draw 300W, regardless of how big the sticker on the box is.

The total heat output from the thing will be that divided by the efficiency (usually 70-80% for these things). So at most, it's outputting 430W of heat (both via the actual heaters, and the heat generated in the PSU).

Using an over-rated supply is just more expensive, bulkier, but will run cooler, last longer, and (usually) provide a more stable voltage.

Also, citation needed on some of those numbers. tongue

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14 Reply by TheBaron (edited by TheBaron 2015-06-09 13:56:43)

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Re: replacement power supplies for SD2?

grob wrote:

Using an over-rated supply is just more expensive, bulkier, but will run cooler, last longer, and (usually) provide a more stable voltage.

Many many years ago I did PC repair and this was one of the major issues we had. Most companies that make end user devices (HP, Dell, Compaq, etc) would skimp on the power supply because it's one of those parts that, unless there is a problem, you won't be able to tell the difference in terms of performance for the most part. I was replacing underrated power supplies on a daily basis because of this cost cutting measure, and occasionally I'd have to replace quite a few more components that the PSU took out on the way out.

As long as you supply a regulated voltage, the board will only take what it needs. Conversely, if you regulate the amperage (like we do when setting vref on our steppers), then the unit will take the voltage that it needs. That's why you can get more torque and what not at the same amperage with a higher voltage supply. You're giving the motor more potential voltage to draw from, the same way that a higher wattage power supply is giving the board more amperage to play with as needed.

That's a gross oversimplification, of course, but it's how I like to think of it big_smile Just remember, the board isn't running off a regulated amperage so don't throw a 50v supply at it or anything like that.

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