08-22-2025, 03:20 PM
I was wrong about the history and composition of the 0.5mm thick Stainless steel I spot welded.
My dad got it in the 70's to hold a Tv antenna mast to the chimney.
It is a 400 series stainless, not sure which.
it is quite magnetic, but not as much as mild steel.
I'd like to pay forward the Purple spot welder.
It can weld 0.1mm pure copper with 0.1mm nickel plated steel sandwich, equivalent of 0.4mm pure nickel
it can weld 0.2 pure nickel
One needs 2 12v batteries to power it. One for the Mosfet driver, and one for the welding current
The Mosfet driver battery need not be special, other than it needs an xt90S connector. The S on this connector means it has a resistor inside of it on the positive side, that engages first when seating the connector. This slowly fills the capacitors and prevents a massive spark which will likely destroy a diode on the circuit board on the 1 or 2nd, maybe 3rd spark.
The weld battery needs to be a 3S, 5.2 to 10.4 AH Lithium polymer battery, with the sweet spot goldilocks battery somewhere in between.
I have not tried a normal 12v healthy lead acid battery as the weld battery with this welder, as doing so blew up two other welders in this price category.
it might be OK if one starts starts on gear 1 and slowly works their way upwards to ofind what ' gear' is actually capable of welding the material they intend on welding. It might not. it could shoot a flame from a mosfet the first time. i dont know.
but I know it works with a 3S Zee 5.2AH "80C" Lithium polymer battery which can be found for as low as 36$ last I looked a month or two ago
The weld battery also needs an XT90 connector, but it does not have to be the antispark version, unless it is mistakenly inserted into the connector which powers the circuit board.
The 3S Lipo battery cannot be charged above 12.6v, or bad things will happen.
It needs to be stored at around 11.1-3 volts and pretty much never below 10.8ish, though opinions vary as to exact numbers.
Lipo batteries are the most dangerous lithium chemistry but they have very high power density, and are pretty affordable.
That said. This all in one 'Kerpu' welder is being sold for less than the Zee Lipo and can weld 0.15mm pure nickel, and perhaps 0.1 copper, 0.05 Nickel plated steel.
https://diy500amp.com/products/awithz-cp...attery-kit
The copper 'flux' brazing paste will greatly aid the ability to weld 0.1mm copper.
https://diy500amp.com/products/flux-for-...lding-100g
My dad got it in the 70's to hold a Tv antenna mast to the chimney.
It is a 400 series stainless, not sure which.
it is quite magnetic, but not as much as mild steel.
I'd like to pay forward the Purple spot welder.
It can weld 0.1mm pure copper with 0.1mm nickel plated steel sandwich, equivalent of 0.4mm pure nickel
it can weld 0.2 pure nickel
One needs 2 12v batteries to power it. One for the Mosfet driver, and one for the welding current
The Mosfet driver battery need not be special, other than it needs an xt90S connector. The S on this connector means it has a resistor inside of it on the positive side, that engages first when seating the connector. This slowly fills the capacitors and prevents a massive spark which will likely destroy a diode on the circuit board on the 1 or 2nd, maybe 3rd spark.
The weld battery needs to be a 3S, 5.2 to 10.4 AH Lithium polymer battery, with the sweet spot goldilocks battery somewhere in between.
I have not tried a normal 12v healthy lead acid battery as the weld battery with this welder, as doing so blew up two other welders in this price category.
it might be OK if one starts starts on gear 1 and slowly works their way upwards to ofind what ' gear' is actually capable of welding the material they intend on welding. It might not. it could shoot a flame from a mosfet the first time. i dont know.
but I know it works with a 3S Zee 5.2AH "80C" Lithium polymer battery which can be found for as low as 36$ last I looked a month or two ago
The weld battery also needs an XT90 connector, but it does not have to be the antispark version, unless it is mistakenly inserted into the connector which powers the circuit board.
The 3S Lipo battery cannot be charged above 12.6v, or bad things will happen.
It needs to be stored at around 11.1-3 volts and pretty much never below 10.8ish, though opinions vary as to exact numbers.
Lipo batteries are the most dangerous lithium chemistry but they have very high power density, and are pretty affordable.
That said. This all in one 'Kerpu' welder is being sold for less than the Zee Lipo and can weld 0.15mm pure nickel, and perhaps 0.1 copper, 0.05 Nickel plated steel.
https://diy500amp.com/products/awithz-cp...attery-kit
The copper 'flux' brazing paste will greatly aid the ability to weld 0.1mm copper.
https://diy500amp.com/products/flux-for-...lding-100g
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