DRV8825s on a RAMPS 1.4… think it was pulling a bit too much current and the connector wasn’t up to it…
::EDIT::
On further inspection, it looks like a dry joint…
i had the same problem … its always the 11A part of the connectors …
so i switched those angle connectors with the blue screw kinda ones on the left where you connect the D8, D9, D10, etc … it works fine now with the DRV8825’s … the prints are much better quality as well …
pls use a fan to cool your ramps and drivers etc all the time …
thinking of moving to SilentStepStick soon
Wow that looks dangerous
@Vaughan_Lundin - could have been if I’d left it overnight…
I had similar. Also the blue one on the right did similar
I’m putting my backup one on now. At this point, I’m thinking that it’s worth investing in something better. The old adage applies, you get what you pay for.
Those are typically 10-12A rated connectors, but when you consider the current through adjacent conductors, they really need to be de-rated to about 7-8A or so. Even if they’re installed perfectly, the heat stress causes the surfaces to oxidize, which increases resistance, which causes more heating, in a vicious cycle until they eventually fail entirely. There are THOUSANDS of printers in use around the world that will eventually melt a connector like this.
@Ryan_Carlyle yup. Seriously thinking of soldering directly to the board…
the RAMPS wiring wiki specifically states NOT to screw the boards together with metal screws. http://reprap.org/wiki/RAMPS_1.4#Wiring
The connectors are under rated and should be replaced or like you said soldered to the underneath. Here is a reiveiw that talks about the issues that can be easly fixed.
like the video Idea of using inline Automotive fuse, I used them before when I converted a 80’s Honda moped that had cheap film fuses. Never understood why they would use such a delicate fuse in anything 12v15A.
У меня была похожая проблема. И я решил больше не думать о разъёма 
https://photos.google.com/share/AF1QipOaTnzZdQ8mX-xvbOb5fx9IYGAsa_6qpQmNrfqxBMY8J5CNrSaGbSC2wbYSbfnx-g?key=Q1hqaGN5cENPN05BNHRRS1otUmotS0JCUU5LWURB
@Pavel_Omelchenko Nice fix.
100% the reason everyone should be swapping to 24v systems.
The connectors also need to be really secure. A loose connection will draw more current and cause it to overheat. Wiring issues are the number one cause of 3d printer fires…