Cheap MIG - repairable or landfill?

[DocBug]

You need to replace a 4.7 Ohm 10W resistor. The one I recommended is 25W same resistance. It should be more than adequate. You can go higher wattage, but I feel it's overkill and would rather try see the cause of the problem.

[mawhins]

Got it. I'll troubleshoot the motor and sheath and check the voltages first as suggested.

[Vernonv]

If you look at the specs of the one I linked to it is only 50W if mounted on an appropriate heatsink ... otherwise it is 20W (note the 25W one is only 12.5W). I selected that one because it was the highest wattage in that price range. If you don't have space constraints I would go for the highest wattage one (within reason).

[DocBug]

Yeah I get that, my only concern is if something is drawing so much current to generate to generate so much heat, it should be addressed. My original thought was to get the heat away from the soldering and PCB to prevent further damage if no further examination of the fault was going to be done.

Regards

[mawhins]

Ok I checked the wire feed and everything looked fine. Moves smoothly through the sheath etc. Pushed the resistor back into place and wire fed through fine. Soldered it back in place and did a few really crappy welds (another story). All was going fine then clunk clunk ... No feed. Same problem no doubt and I thought i was being careful not to overload it. Beginning to wonder if this thing is worth bothering with.