abi tack 2 pulse arc welder

[goatman]

has anyone used one of these for spotwelding 18650's?

Pulse-Arc-Welder: Ring Prong Replacement - Ganoksin Jewelry Making Community

Steece Hermanson will describe the procedure on a ring prong replacement using the ABI Tack II and Pulse-Arc Welders. Read more on how he did it.

www.ganoksin.com

 

[fechter]

Those things are cool. I don't know anyone who has tried it on a battery though. It may be able to weld a copper fuse wire to the end of a cell. Orion makes the really nice ones but very expensive. Pulse Arc Welders (TIG)

 

[goatman]

i picked it up off craigslist today, ill start playing with it this weekend to see what it can do

 

[goatman]

started playing with it and with the energy selector on high and 90 to 95 volts DC it spot welds 0.1mm copper to the neg end of the cell
when you pull off the copper it leaves a little nugget on the cell and a nice little round hole in the copper sheet
its not really a spot welder though, you dont get 2 probes
wound up grounding the negative to the shell of the battery, you dont get 2 spot welding probes, only 1
then i laid the copper on the end and the positive probe
step on the pedal and its spot welded
turned it up to 100 volts and wound up blowing a hole through the bottom of the cell and i think i blew the voltage potentiometer
the part number i got is rv4naysd105a c2 ku051s28 1mes
according to this data sheet

https://www.jameco.com/Jameco/Products/ProdDS/13979v1.pdf

rv4 is means military style
n=standard bushing
a=without switch
y=as per mil-r-94
s=slotted shaft
d= shaft diameter 7/8
10= ohms
5= number of zeros after 10 ohms (a million ohms is 1 megaohm
a= linear taper, 10% tolerance

RV4NAYSD105A | Digi-Key Electronics

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www.digikey.com

i need to order the pot and a couple spot welding probes and one of those tig torches

 

[999zip999]

I use one of those at a jewelry show and when you're doing 14 karat you need 14 karat wire if you're doing it next to a soldered joint of 14 karat it would kind of blow out the solder so it was only for direct 14 karat 14 karat or sterling silver to sterling silver.
As with 14 karat solder there's 4 temps 14k melts 1750 hi temp solder 1550 ,med 1450, ez 1350. Or soI I always wanted one. To tack a setting in place then solder for strength and to fill in holes. Each solder has a different color and you want to use the most high temp you can get away with. Same with sterling silver some people don't want to go below medium as it tarnishes easier than sterling silver itself.
Off the top of my head I'm not sure what copper melts at maybe 2100 degrees Fahrenheit.

 

[999zip999]

Copper 1950 Fahrenheit is the melting point for copper.