plug for heatbed gets hot

[gamura]

Hi,

since yesterday the heatbed of my A30 stops heating midprint. I just noticed that the power plug for the heatbox gets pretty warm when the heatbeds is doing its job. Is this normal? Or can this be the cause of my heatbed stopping midprint. When I take look at the connector itself, I can see see that pin nr.2 is darker, looks corroded, a little like those shown on the image in https://www.geeetech.com/forum/viewtopi ... 65&t=61719 . When the heatbed is working, i can measure 11V DC on the both contacts below the headbed.

What should I do? Replace the connector on the box? Replace the connector on the cable? Or should i file the corrosion away? Or is this just normal ans i have to find the cause of my issue somewhere else?

Thanks in advance

Gamura

[_kaktus_]

Hello.


It's good that you've noticed it.
This fault would get worse.

It is necessary to clean the contacts. Otherwise their conductive properties will deteriorate due to corroded surfaces.

You can try to clean them mechanically by scraping.
Next, to be sure, clear them in preparation for cleaning jewelry made of precious metals.
It is important to gently crimp these female plugs to fit the pins better.

You can also replace the socket and plug with a new one.

The first solution, consider it temporary, until the second one is completed.

[gamura]

Hi _kaktus_,

thanks for your helpful suggestions. I was able to file away the corrision, now the pin looks pretty shiny again . And this solved the issue for now. No more "the head element stops" error messages. Looks like this reduced the resistance to a level where the plug doesnt get warm anymore. I noticed, that the cable itself still gets a little warm next to the plug. So my next step is to replace the plug. Since only 4 of the 6 pins are wired, I think I will go for a GX16-4 plug with only 4 pins. Mainly because it is much harder finding a 6 pin aviation connector/plug around. The 4 pin thing seems much more common, at least when it comes to shopping in my area .

Thanks!

Gamera


PS:
You are such a helpful person when it comes to resolving printer issues. If you are around in northern germany (kiel/hamburg), give me a note. I will be happy to invite you to a nice beer .

[_kaktus_]

Hi.


Your recognition is very important to me.
You have shown gratitude. Few people can afford it.
Gracefulness.

I live in the vicinity of Germany, on the map on the right.

Now we will solve the rest of the problem.

Carefully solder the place where the cable is connected to the pin.
Be careful that tin does not flood the female pins.

This operation will perfectly improve the quality of the contact in this place.
The cable should stop heating up.

To remove the pin from the plastic mount, find the latch and press it.
Example photo.
.

high_res_764.jpg (50.61 KiB) Viewed 6424 times

.
Some types of pins have pawls on one side only.