Wiring up a LED power supply for heated bed

Wiring up a LED power supply for heated bed

Postby inertianinja » 2018-Aug-Sun-08-Aug

My original ATX power supply died, so I need a replacement.

I have seen a lot of recommendations for using a LED power supply like this: https://www.amazon.com/eTopxizu-Univers ... 00D7CWSCG/

I'd like to wire up one of the 6-pin molex connectors that would connect to the stock board.

Does anyone have a guide for how to wire this up properly? I have a basic idea of what to do, but since it's power I'd rather not leave anything to chance.
  • 0

inertianinja
Levelling print bed...
 
Posts: 46
Joined: 2015-Jan-Wed-07-Jan
Reputation: 1

Wiring up a LED power supply for heated bed

Sponsor

Sponsor
 

Re: Wiring up a LED power supply for heated bed

Postby novice » 2018-Aug-Sun-08-Aug

I occasionally move my printers so an xtra molex was added outside the printer to facilitate separation.
molex 001.JPG


Another view under the printer.
molex 002.JPG


Found the connectors on Amazon. This style of power supply has a pot up front to vary output voltage, so you might consider a digital display for that. There is a plethora of printed power supply front covers on thingiverse.
  • 0

You do not have the required permissions to view the files attached to this post.
novice
Waiting for extruder temp...
 
Posts: 76
Joined: 2018-Jan-Sat-18-Jan
Location: South of Up North
Reputation: 3

Re: Wiring up a LED power supply for heated bed

Postby inertianinja » 2018-Aug-Sun-09-Aug

novice wrote:I occasionally move my printers so an xtra molex was added outside the printer to facilitate separation.
molex 001.JPG


Another view under the printer.
molex 002.JPG


Found the connectors on Amazon. This style of power supply has a pot up front to vary output voltage, so you might consider a digital display for that. There is a plethora of printed power supply front covers on thingiverse.



So all six connectors on the power supply are used?

https://images-na.ssl-images-amazon.com ... L1000_.jpg
  • 0

inertianinja
Levelling print bed...
 
Posts: 46
Joined: 2015-Jan-Wed-07-Jan
Reputation: 1

Re: Wiring up a LED power supply for heated bed

Postby novice » 2018-Aug-Sun-09-Aug

Yes, if only to spread the load. The terminals are there, you may as well utilize them. Believe if one were to check, continuity exists between all of the power supply's + connections. The same with the - connectors. I then piggyback one set of the screw terminal 12v leads for a panel mounted voltage meter. I suppose one could use two pairs of terminals for printer power and the third for meter and it would be ok.

Sorry I thought you originally sought clarification at the printer terminal, not the power supply.
  • 0

novice
Waiting for extruder temp...
 
Posts: 76
Joined: 2018-Jan-Sat-18-Jan
Location: South of Up North
Reputation: 3

Re: Wiring up a LED power supply for heated bed

Postby inertianinja » 2018-Aug-Sun-16-Aug

novice wrote:Yes, if only to spread the load. The terminals are there, you may as well utilize them. Believe if one were to check, continuity exists between all of the power supply's + connections. The same with the - connectors. I then piggyback one set of the screw terminal 12v leads for a panel mounted voltage meter. I suppose one could use two pairs of terminals for printer power and the third for meter and it would be ok.

Sorry I thought you originally sought clarification at the printer terminal, not the power supply.


Thank you...so, if I'm understanding correctly, I would take one of those 6-pin molex connectors from a power supply, and connect the 3 black and 3 yellow to the corresponding V- and V+ lines, and that's it?

(obvs i'd need a power cord for the AC L/N/GND)
  • 0

inertianinja
Levelling print bed...
 
Posts: 46
Joined: 2015-Jan-Wed-07-Jan
Reputation: 1

Re: Wiring up a LED power supply for heated bed

Postby novice » 2018-Aug-Sun-21-Aug

Is the molex harness something you've clipped from the old ATX power supply? Not sure how yellow wires have entered into this discussion.
In the example photos posted previously red is + and black is -, you should be able to see connector orientation on an F series board in photo molex002.jpg
  • 0

novice
Waiting for extruder temp...
 
Posts: 76
Joined: 2018-Jan-Sat-18-Jan
Location: South of Up North
Reputation: 3

Re: Wiring up a LED power supply for heated bed

Postby inertianinja » 2018-Aug-Tue-06-Aug

novice wrote:Is the molex harness something you've clipped from the old ATX power supply? Not sure how yellow wires have entered into this discussion.
In the example photos posted previously red is + and black is -, you should be able to see connector orientation on an F series board in photo molex002.jpg


sorry, should have been clearer. i have a RevF printrboard w/ the 6-pin molex connector.

The 6-pin PCIE cables that come with modular power supplies - my understanding of the pinout is 6+/6-; some of the cables I have include 3 yellow wires (12V as far as I know) and 3 black wires.
Yours look like red and black instead; i hadn't seen 6-pins that use red, but same thing.
  • 0

inertianinja
Levelling print bed...
 
Posts: 46
Joined: 2015-Jan-Wed-07-Jan
Reputation: 1

Re: Wiring up a LED power supply for heated bed

Postby RetireeJay » 2018-Aug-Tue-15-Aug

Yes, the standard color code for PC power supplies has black for ground, red for +5V, and yellow for +12V. Often other power supplies will use black for ground and red for whatever positive voltage they are providing.
  • 0

Printrbot Plus operational January 2013
Brass threaded rods (5/16" X 18) & nuts for Z axis
GT2 belts & pulleys
Cable chain to reduce probability of fatigue failure in wires
E3D V5 Hot End, 0.4mm nozzle, also 0.8 and 0.25 in use occasionally
PB fan mount + 40mm fan -- using printed mount adapter, not the E3D supplied fan
Injection molded extruder gears
Optical Z "endstop" (custom designed and built)
Have used many pounds of T-Glase filament. Now also doing some work with Ninjaflex SemiFlex
Print on glass with Scotch Craft Stick or other glue stick
"My next printer is..." Prusa i3 MK3
User avatar
RetireeJay
My next printer is...
 
Posts: 4941
Joined: 2013-Jan-Wed-13-Jan
Location: Greenville, SC
Reputation: 496


Return to General

Who is online

Users browsing this forum: No registered users and 1 guest