BenJackson wrote:That connector was not designed to be used the way it is...If it melts it's probably due to being backed partway out.
The pins contacts kinda oxydes > resistance > tension > heat and HBP tension drops.
I totally removed the Rambo Molex, replaced with soldered thick pins, with cable soldered to them. I use soft silicone cable multibrin. Both PSU cables are now reduced to a connection box.
BenJackson wrote:If you drive the bed from 24V you're going to blow the polyfuse (you'll double the amperage). I don't know if the FET on RAMBO can handle it (I replaced the one on my RAMPS and used an external fuse when I did something similar to my prusa)
If you go 24v, you have to connect the 2 heater elements of the HBP in serie, to keep the amperage (HBP connector goes Y)? As you did, I removed the polyfuse (14A - 16V) and added a 15A blade fuse in the connection box. The NXP FET for HBP can handle 15A (Specs).
Will tell how my 24v upgrade works (for HBP, steppers and logic).
Human has 20 nail ... extruders.