Hi everybody,
I created this thread in order to ask and discuss some question about spot welding:
- I seen these spot welder are quite common on the internet and market:
And a DIY one:
These spot welders main part is a high current transformer which will transform main voltage to lower AC voltage, then the output is fed directly to the weld parts. Because of leakage inductance, these cannot deliver very high peak current, compare to capacitors.
But in the industry these are rarely used, what are used are spot welder based on capacitors. A capacitor (or more common a bank of capacitors) is charged to high voltage then dumped in very short time to a transformer, which step down the voltage. These capacitors are pulsed rated and can discharge its energy in very short time, resulting in extreme current and fast fusion of welding material.
How much superior is capacitors based spot welders are compare to main transformer based spot welders?? I can see that the "DIY" spot welder make welds look so awful, the weld material had its mechanics properties degraded.
- Why do DIY community& market built such a low quality devices? Capacitors banks aren't very expansive?? Why can't we spent a little more buck to improve the quality of the weld? Can I use such DIY devices to weld parts exposed to high tension?
I created this thread in order to ask and discuss some question about spot welding:
- I seen these spot welder are quite common on the internet and market:
And a DIY one:
These spot welders main part is a high current transformer which will transform main voltage to lower AC voltage, then the output is fed directly to the weld parts. Because of leakage inductance, these cannot deliver very high peak current, compare to capacitors.
But in the industry these are rarely used, what are used are spot welder based on capacitors. A capacitor (or more common a bank of capacitors) is charged to high voltage then dumped in very short time to a transformer, which step down the voltage. These capacitors are pulsed rated and can discharge its energy in very short time, resulting in extreme current and fast fusion of welding material.
How much superior is capacitors based spot welders are compare to main transformer based spot welders?? I can see that the "DIY" spot welder make welds look so awful, the weld material had its mechanics properties degraded.
- Why do DIY community& market built such a low quality devices? Capacitors banks aren't very expansive?? Why can't we spent a little more buck to improve the quality of the weld? Can I use such DIY devices to weld parts exposed to high tension?