Gen 6 ATX PowerSupply I found this old power supply in my basement and was wondering if i could use it , its 450W, and i think its atx 2 as the big molex connector has a detachable 4pin plug. Im also not sure if im supposed to collect all the 12V wires and solder them together , or if i could just use the extra 4pin 12V wires ? also this is for the GEN 6 electronics. pics img0224tla.jpg mod_embed_images_loadimage('88bf7bf2008a7b7222f3286380372310', 'https://reprap.org/forum/addon.php?13,module=embed_images,url=http%3A%2F%2Fimg69.imageshack.us%2Fimg69%2F3231%2Fimg0224tla.jpg', 'http://img69.imageshack.us/img69/3231/img0224tla.jpg', 'https://reprap.org/forum/addon.php?13,module=embed_images,check_scaling=1,url=http%3A%2F%2Fimg69.imageshack.us%2Fimg69%2F3231%2Fimg0224tla.jpg', '', 80551, 800, 400, 'Loading image ...', false); img0225ha.jpg mod_embed_images_loadimage('e9a5c0159eaed94b36074b015845954c', 'https://reprap.org/forum/addon.php?13,module=embed_images,url=http%3A%2F%2Fimg193.imageshack.us%2Fimg193%2F4104%2Fimg0225ha.jpg', 'http://img193.imageshack.us/img193/4104/img0225ha.jpg', 'https://reprap.org/forum/addon.php?13,module=embed_images,check_scaling=1,url=http%3A%2F%2Fimg193.imageshack.us%2Fimg193%2F4104%2Fimg0225ha.jpg', '', 80551, 800, 400, 'Loading image ...', false); https://reprap.org/forum/read.php?13,80551,80551#msg-80551 Mon, 17 Aug 2026 10:20:53 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,80551,187092#msg-187092 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,187092#msg-187092 brnrd Controllers Sat, 23 Feb 2013 13:45:52 -0500 https://reprap.org/forum/read.php?13,80551,186852#msg-186852 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,186852#msg-186852 Brano Controllers Fri, 22 Feb 2013 12:19:54 -0500 https://reprap.org/forum/read.php?13,80551,81240#msg-81240 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,81240#msg-81240 -------------------------------------------------------
> So I will ASS-U-ME that you had your electronics
> running on the 12v when you did your measurements
> with and without the load resistor.

i did both, with the gen6 plugged in and without , results were the same.]]> Rooski Controllers Mon, 18 Apr 2011 18:16:08 -0400 https://reprap.org/forum/read.php?13,80551,80958#msg-80958 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80958#msg-80958 Under no load for the 12v line you won't see any difference!
So I will ASS-U-ME that you had your electronics running on the 12v when you did your measurements with and without the load resistor.]]> rhmorrison Controllers Sat, 16 Apr 2011 02:16:00 -0400 https://reprap.org/forum/read.php?13,80551,80927#msg-80927 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80927#msg-80927
So im just going to keep my supply as is and just tuck the wires in the case.]]> Rooski Controllers Fri, 15 Apr 2011 16:29:19 -0400 https://reprap.org/forum/read.php?13,80551,80852#msg-80852 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80852#msg-80852 -------------------------------------------------------
> Do you actually get 12V on the 12V rail though. I
> have seen it as low as 10V without a dummy load
> and that makes a big difference to the extruder
> heater.

Yes on both rails. The problem with it is that I think it's well overrated. eEven though they rated it at 18A each, I found that there's up to a 0.3 V drop on both rails everytime the heater comes on. The heater I'm using is the Prusa PCB which has a resistance at room temperature of 1.1 ohms so it should draw no more than 11A . The tip is on the other rail which should draw about 2A. This is well below the rated output for each rail and yet the voltage drop is fairly large. I got it from Microcenter. I can post details on manuf/model if there's interest.]]> brnrd Controllers Thu, 14 Apr 2011 22:47:38 -0400 https://reprap.org/forum/read.php?13,80551,80840#msg-80840 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80840#msg-80840 bryanandaimee Controllers Thu, 14 Apr 2011 19:31:12 -0400 https://reprap.org/forum/read.php?13,80551,80791#msg-80791 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80791#msg-80791 -------------------------------------------------------
> I think the 12V regulation will depend on the
> design of the Switch mode PSU hence this variation
> people are seeing.
>
> All of the PC Switch mode supplies I have used so
> far have been very old power units. I have not
> seen a lower voltage on the 12V line either. It
> could possibly be only on some of the newer Switch
> mode designs where this shows up as a problem
> maybe?

this PSU isnt too old , id say like 4-5 years , it came with the pc case i ordered , but i already had a nice 600w PSU so it was boxed away.
Im going to pick up a good digital meter today ,and test with different loads, and see if there is a difference.]]> Rooski Controllers Thu, 14 Apr 2011 11:16:19 -0400 https://reprap.org/forum/read.php?13,80551,80769#msg-80769 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80769#msg-80769
All of the PC Switch mode supplies I have used so far have been very old power units. I have not seen a lower voltage on the 12V line either. It could possibly be only on some of the newer Switch mode designs where this shows up as a problem maybe?

I curently do not use a PC supplies as I prefer to run my electronics on a higher voltage of 24V to 30V.

It also means the supplies are lower cost, lower profile, less wires & looks neater.

I have not changed from a 6.8ohm element / resistor on the extruder with an 8ohm heated bed.

I still use the same old PC supplies for other projects I must have 6 or 7 old PC supplies from 100W > 250W.

I don't think I have used a higher watage supply.]]> BodgeIt Controllers Thu, 14 Apr 2011 07:36:25 -0400 https://reprap.org/forum/read.php?13,80551,80741#msg-80741 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80741#msg-80741 nophead Controllers Thu, 14 Apr 2011 02:18:15 -0400 https://reprap.org/forum/read.php?13,80551,80732#msg-80732 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80732#msg-80732
One disadvantage or advantage with this is that if I issue an M0 command to disable the steppers, the power supply goes off. I then have to disconnect and reconnect the PS_ON pin to turn it back on after enabling the steppers again. I use this sometimes if I leave a long print unattended so it shuts itself of in the end.]]> brnrd Controllers Wed, 13 Apr 2011 20:52:34 -0400 https://reprap.org/forum/read.php?13,80551,80719#msg-80719 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80719#msg-80719 nophead Controllers Wed, 13 Apr 2011 18:15:17 -0400 https://reprap.org/forum/read.php?13,80551,80697#msg-80697 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80697#msg-80697
also putting a load on the 5v(hard-drive) doesnt seem to change the voltage at all , on my meter(not digital) the 12v line stays at 11v , same if no load.]]> Rooski Controllers Wed, 13 Apr 2011 16:12:12 -0400 https://reprap.org/forum/read.php?13,80551,80681#msg-80681 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80681#msg-80681 nophead Controllers Wed, 13 Apr 2011 14:54:56 -0400 https://reprap.org/forum/read.php?13,80551,80657#msg-80657 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80657#msg-80657 forum post
from the wiki

and neither mentions a load resistor . all they say to do is connect the green to a ground , and on pin 11 make sure the brown sensing wire is connected to an orange +3.3(mine already has a brown and orange connected in pin 11). so would i need to hook up a hard-drive to get it working ?

ok , i just connected the green to a ground , and the powerSupply turns on (fan is on and correct voltage through wires) , but i havent tested it on the Gen6 board yet.]]> Rooski Controllers Wed, 13 Apr 2011 12:49:07 -0400 https://reprap.org/forum/read.php?13,80551,80611#msg-80611 Re: Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80611#msg-80611 Traumflug Controllers Wed, 13 Apr 2011 05:17:27 -0400 https://reprap.org/forum/read.php?13,80551,80551#msg-80551 Gen 6 ATX PowerSupply https://reprap.org/forum/read.php?13,80551,80551#msg-80551
also this is for the GEN 6 electronics.
pics


]]> Rooski Controllers Tue, 12 Apr 2011 15:45:14 -0400