Heat bed stop working found and fixed:)
I would have probably just replaced the Ramps board. But that should get you going until you can get a replacement.
Hah! Very nice! – With a little bit of solder braid you should be able to take the old connectors off. Maybe we should be looking at better solutions for high current/cheap connectors.
One tip. Don’t tin wires before putting them into screw terminals. Or if you /have/ to/ use lead-free solder. Traditional lead solder ‘spreads’ under the clamping force and over time loosens the join.
But any solution that gets you back up and running without making things worse is a good one!
@ThantiK wie dont need another connector, a cheap and easy way can often be seen in industrial produced things.
you can design your board the way to use two connectors each “cable”
Mostly thats cheaper then using a connector for higher currents
@Electra_Flarefire
Just don’t use screw terminals. Just…don’t.
Spring terminals. Take a look at WAGO.
http://www.wago.us/products/pcb-terminal-blocks-and-connectors/overview/
A lot of great stuff in their picoMax line. I’m playing with some samples.
http://www.wago.us/products/pcb-terminal-blocks-and-connectors/compact-pcb-connectors-for-solder-pin-strips-and-individual-solder-pins/overview/
@Mark_Fuller I can’t stand spring terminals for high current use. For quick interconnects and signal wires, they are great, but not anything with power. Such as the heatbed.
House mains wiring is all copper-on-brass screw terminals and handles tends of amps very nicely. It’s solder-in-screw-terminals that gets to me.
The core problem is that the connectors used on RAMPS boards(And even on Smoothie boards) the are just not meant to take that current, they can handle 5 amps easy, but start to struggle beyond. Better to go to 24v for the bed, then your in the right range for the terminals.
http://m.ebay.ie/itm/171722407882?nav=SEARCH
What you’s think about this terminal? in description item is 16amp
Found the any terminals 5.08mm should handle up to 16a,mayby anyway r ordered will see how long it survive ,and just a thought my terminals was join so probably after hours of work and mashine vibrations join didnt handle
What can be seen in industrially produced things, direct, surface-solder of power wiring protected by a wad of kapton tape?
@przemyslaw_fira I’ve used those, they have a little flat spring shim between the screw and wire. Wires pull out easily.
@Electra_Flarefire I agree that most boards do a poor job at handling current. I tend towards using industrial solid state relays for heavy loads. Power wiring gets crimped rings to connect to that.
The cheapo spring terminals give them a bad name. Wago is one of the few high-quality ones. Screw terminals are hit or miss for long term reliability as well. Overtorque is as bad as under, and it’s rare to see a calibrated tool used.
Either way, put a crimped ferrule on stranded wire prior to putting into a screw or spring terminal for higher reliability. Use the right tools instead of mashing it with pliers (I was young once, but learned) .