Heated bed - change of voltage from 12v to 24v.

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Macflame
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Heated bed - change of voltage from 12v to 24v.

Post by Macflame » Fri Sep 27, 2019 10:55 pm

I am rewiring my heated bed to take 24v. I cannot seem to clean up position 1s solder pads. From diagrams I can see that the solder point 1 had two solder pads. Mine seem to be fused together.
I have tried loads of liquid flux with solder wick, adding more solder and I just can't seem to part the pads. The residue melts but stays fixed.
Is it necessary that both pads are separated?
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William
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Re: Heated bed - change of voltage from 12v to 24v.

Post by William » Sat Sep 28, 2019 9:14 am

Hi, from your picture, you need to separate it.
-Keep your mind and try to test it. :)
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-You can ask me the questions and I will kindly reply.
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_kaktus_
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Re: Heated bed - change of voltage from 12v to 24v.

Post by _kaktus_ » Sat Sep 28, 2019 7:06 pm

Hello.
:mrgreen:

I'd like to see a picture of all the soldering pads on your heated bed. :idea:
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Macflame
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Re: Heated bed - change of voltage from 12v to 24v.

Post by Macflame » Sun Sep 29, 2019 10:37 pm

here is a photo of what the board looks like now. It is for 24v usage.
There are no pads under the number three, so I have assumed the pad nearest the number 3 is the correct one for the negative lead.
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Macflame
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Re: Heated bed - change of voltage from 12v to 24v.

Post by Macflame » Mon Sep 30, 2019 9:46 pm

Try as I might I could not reveal a gap in the solder. So I bit the bullet and used a fine nail file to take off the remainder solder.
I then found that the what I thought was supposed to be two solder pads turned out to be 1 big solder pad that joined two traces together.
(Please see photo.).
When I tested the resistance between solder point 1 and ground on point 3 I got 1.5Ohms. When I tested resistance on solder points 2 and 3ot 2.5ohms. Is that about right?
I suppose I could cut through the traces at the points on my photo marked red, just to be sure but I am not even sure that is necessary now. lol
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_kaktus_
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Re: Heated bed - change of voltage from 12v to 24v.

Post by _kaktus_ » Tue Oct 01, 2019 2:26 am

Hi.
:mrgreen:

My request was special...
I think you already know why. ;)

Basically, when you look at these elements in different offers, the vast majority of them have five leads.
Two of them are temperature measurements. The other three are responsible for preparing the connections for different supply voltages (resistance changes).

If you want to know how it works, take a look at the parallel or serial connection of resistors. :idea:
Two heating lines correspond to them.
H-B_polaczenie_zasilania.jpg
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.
Perhaps in your case the description of the leads was made carelessly. And that's why the numbers are placed next to the leads.
:D
On the forum I help to use the rod, I don't give fish.
Geeetech Prusa I3 M201 Dual extruder Mixcolor 3D printer, bought 2017-12-19, already built, in the cognitive and improvement phase
Geeetech filament, ABS only
Geeetech 3D WiFi Module for 3D Printer, bought 2018-04-15, He got a new life, and still lies in a drawer.
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Macflame
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Joined: Sat Jan 14, 2017 10:18 pm

Re: Heated bed - change of voltage from 12v to 24v.

Post by Macflame » Fri Oct 04, 2019 7:33 pm

Thanks again _kaktus_ .

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_kaktus_
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Re: Heated bed - change of voltage from 12v to 24v.

Post by _kaktus_ » Fri Oct 04, 2019 8:05 pm

Ohh ...
:)
Okay, no problem.
On the forum I help to use the rod, I don't give fish.
Geeetech Prusa I3 M201 Dual extruder Mixcolor 3D printer, bought 2017-12-19, already built, in the cognitive and improvement phase
Geeetech filament, ABS only
Geeetech 3D WiFi Module for 3D Printer, bought 2018-04-15, He got a new life, and still lies in a drawer.
Positively frenzied customer of Getech Technology.

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