4 ms·
???? I think you must be thinking of a different device.
by 0_____0 2y ago
???? I think you must be thinking of a different device.
- aaron695 2y agoThey are thinking of exactly the correct machine. A liquid rheostat is just a rheostat https://en.wikipedia.org/wiki/Liquid_rheostat https://en.wikipedia.org/wiki/Liquid_rheostat They were used in the past just like the light dimmer, but I challenge a present day photo in a developing countries workshop. Heaps of Youtube spam and 'lets try', I'd like to see one in a real workshop in the wild. (That would be cool to see)
- idiotsecant 2y agoI think if you think it through carefully you'll understand how they are fundamentally the same.
- 0_____0 2y agoThis is essentially a big variable resistor - how does one apply that to arc welding?
- idiotsecant 2y agoWhat is it that you suppose a modern arc welding system does? Stick welding needs about 20-30 volts during the weld (60v to strike the arc if we have a fancy machine). In a modern machine we turn high voltage low current mains power into low voltage high current arc welding power. This rheostat would turn it into low voltage slightly lower current but it would still work fine for light gauge.
- 0_____0 2y agoI've done a fair bit of TIG, a little bit of SMAW. Are we talking about welding with basically reduced mains current? AC? SMAW and TIG both require current well in excess of what you can get out of a wall without tripping a breaker. I think for welding 14ga mild steel I was running at minimum 80A on the machine, but more like 130A with the foot pedal. Are you talking light gauge like as in spot welding territory?