Re: [MakerGear] Power supply connection for flat 4 pin from Atx to RAMPS

[Rick Pollack]

I'm sorry but I do not understand the question.

On Sun, Jul 22, 2012 at 11:59 AM, Inventor74 <J...@carefreeelectric.com> wrote:

I can't seem to figure out what side of the 4 pin flat atx connector is 5A and which is 11A. 

Can somebody tell me, when I remove the old connector from the ramps and install the one included with the kit does the narrow side of the "trapezoid" point to the outside or inside of the ramps board?

[Andrew Roberts]

I'm assuming this is for a MakerGear Prusa, otherwise ignore me :).

This is what the power connections on my makergear prusa look like
http://brazenartifice.files.wordpress.com/2011/12/heated-bed-pcb-connections-to-ramps.jpg

You can see that there's no molex connectors plugged into the RAMPS.
Those odd green connectors on the right of the photo have black 2-core
"lamp cord" going into them. The other ends of those black cords go to
the 4-pin molex connectors which plug into the wiring loom from the
power supply.

The difference between the 5 amp and 11 amp connectors (at least on my
power supply) is the _shape_ of the connector. The flat one with the
bevelled end (with two black wires, a red wire and a yellow wire)
supplies 5 amps, and the square one (with 2 black and two yellow wires)
supplies 11 amps.

Note that only the black and yellow wires coming from the power supply
are used, the red ones are only 5V.

You shouldn't need to unsolder anything on the RAMPS.

Hope that helps.

On 23/07/2012 1:59 AM, Inventor74 wrote:
> I can't seem to figure out what side of the 4 pin flat atx connector is
> 5A and which is 11A.
> Can somebody tell me, when I remove the old connector from the ramps and
> install the one included with the kit does the narrow side of the
> "trapezoid" point to the outside or inside of the ramps board?

--
-Andrew Roberts
brazena...@gmail.com
brazenartifice.wordpress.com

[TJ]

Hi,

Do you have one of the eagle voltas supplies?

Does anyone know if this is always true? The high current rail is the 4 pin molex? And the low current rail is the flat 4 pin plug shared with the 5v line?

Thank you,

[Andrew Roberts]

Yes, I have an eagle volta.

I think the fact that the square-shaped 2-by-2 molex connector on the
loom has two yellow and two black wires (ie, the wires are run in
parallel for extra current capacity) is the clue!

Have a look at http://reprap.org/wiki/PCPowerSupply
where they show a photo of the high-current connector.

[Jay Couture]

Have a look at this older thread.  https://groups.google.com/forum/?fromgroups#!topic/makergear/eX_v4R1pNNQ 

If yours is the ET-PSVT500 then the output specs from http://www.eagletechusa.com/ET-PSVT500.htm#SPECIFICATION are:

a??? Output: +3.3V@24A; +5.0V@30A; +12V1@12A; +12V2@14A; -1...@1.5A; +5...@2.5A 

This means both rails are over 10A. The V2 is the 4 pin square (two yellow and 2 black) connector.

http://www.nomenclaturo.com/atx-power-connector-pinouts-diagram.html 

-Jay

[Andrew Roberts]

Ok, that's even more specific, so thanks for that. The 2x2 connector is
still higher capacity than the in-line 4-pin molex, so the general rule
still holds true.

On 24/07/2012 11:35 PM, Jay Couture wrote:
> Have a look at this older thread.
> https://groups.google.com/forum/?fromgroups#!topic/makergear/eX_v4R1pNNQ
>
> If yours is the ET-PSVT500 then the output specs from
> http://www.eagletechusa.com/ET-PSVT500.htm#SPECIFICATION are:
> a??? Output: +3.3V@24A; +5.0V@30A; +12V1@12A; +12V2@14A; -1...@1.5A;
> +5...@2.5A
>
> This means both rails are over 10A. The V2 is the 4 pin square (two
> yellow and 2 black) connector.
> http://www.nomenclaturo.com/atx-power-connector-pinouts-diagram.html
>
> -Jay
>
> On Tue, Jul 24, 2012 at 8:20 AM, TJ <tjj...@gmail.com
> <mailto:tjj...@gmail.com>> wrote:
>
> Hi,
>
> Do you have one of the eagle voltas supplies?
>
> Does anyone know if this is always true? The high current rail is
> the 4 pin molex? And the low current rail is the flat 4 pin plug
> shared with the 5v line?
>
> Thank you,
>
> On Jul 23, 2012, at 3:19 AM, Andrew Roberts

> >brazena...@gmail.com <mailto:brazena...@gmail.com>
> >brazenartifice.wordpress.com <http://brazenartifice.wordpress.com>