After going through 2 “Boss level spot welders”, 5 lipos over a year and a half, and a Sunkko 737G+ Ive had it enough
Basically after less than 2 months of use another new boss level welder has failed on me or the lipos which i doubt because they are 2 5ah panther graphene in parallel
I even heated up the lipos to room temperature at 25 celsius over night before trying again
I got 6 packs to build, deadlines are approaching and the welds I get are really weak, so weak that I can almost break them by hand.
And lately the welders failing on me, and throwing lots money in thrash for customs has been really stressing me out
I usually would get welds stronger than the strip itself, the welds would stay “sticked” to the cell and the strip would just start ripping from them
Im desperate to find a welder that is reliable,does not overheat, yet strong enough to weld 0.15mm pure nickel or more
All I found on the internet were sunkkos, which I find very sketchy, and sunstone welders with no pricing on their sites, and arduino based and lipo powered
I found the @aulakiria welder amazing, for a few batteries, but using it for regularly building packs its not so great, because even with a heatsink and a fan I menage to get it to 40celisus
I would of suggested thw arduino spot welder but it doesnt seem to be so useful in ur situation since if u go “cheap” then its going to cost u more because that is what has happened so far? But im pretty sure there are some inexpensive industrial spot welders
Kweld is very robust. He sells a wall plug psu with a super capacitor bank so you don’t have to deal with lipos for welding all day with consistent power. But if you go at it like a madman it’ll still get hot. When I weld fast the elecrtodes get too hot to hold. Then the battery connections, then the wires. Will want several probe sets to swap if welding a crap-ton very fast.
I used 3 second between automatic welds on my boss level welder, and it would overheat every 5min
I have been considering this welder for a backup, just last week
Im in Croatia, so yea just VAT
But still I would like something 220v powered, just for not having to replace the batteries every few months because a pair of graphenes is like 120$
Have you considered getting 2-3 welders with batteries and switching them out every 50 or so welds?
That way they would stay cool and last longer plus you always have a spare if one breaks.
The heat is probably the reason they keep dying on me, on a certain speed of welding the temperature on the sensor stays at 30celsius, but that is wrong for sure, the mosfets are at probably like 100c
3 boss level Welders would cost me around 700$, that is not really a solution to my problem but is my last choice
I use the sunkko 709a. But I see there is difference between each 709a welder. There are some good welders from a batch and some bad.
It is also important which circuit breaker your house have. I use a 30A type C circuit breaker. My house installation has a possibility to deliver (at peak) 80A @240v. A spotwelder is such like a big short-circuit for your home installation.
I made an Welder out of an Microwave oven transformer, the welds are so awesome with this one. Even getting better results than the “better” one in my workplace… Oh and I have an Footpedal, which is great.
