Need some info on this battery spot welder. - Page 1
Forum section: electronics / beginners

author: Peter Tryndoch
author_rank: Contributor
timestamp: January 06, 2023, 01:55:18 am
content: I was looking to purchase this cheap battery spot welder doing the rounds on EbayWill it run off 12V ?And how do you trigger the weld?Thank you

author: BillyO
author_rank: Super Contributor
timestamp: January 06, 2023, 02:11:02 am
content: Might not be a popular answer, but I'd honestly leave the spot welding to trained people. A guy I know lost parts of two fingers trying spot welding with a home rigged battery fail.My guess is one button spot welds, another burns your house down and a 3rd causes 4th degree burns. Your guess is which is which.

author: jpanhalt
author_rank: Super Contributor
timestamp: January 06, 2023, 04:27:44 am
content: Doesn't this answer your question?https://www.ebay.com/itm/364067174137?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D244882%26meid%3Db6bcf3fbd913413b99ea4c365f6a5d9a%26pid%3D101195%26rk%3D5%26rkt%3D12%26sd%3D165819052014%26itm%3D364067174137%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuWithRevOptLambda90KnnRecallV1%26brand%3DUnbranded&_trksid=p2047675.c101195.m1851&amdata=cksum%3A364067174137b6bcf3fbd913413b99ea4c365f6a5d9a%7Cenc%3AAQAHAAABIPZqctS1aW2Gn1fMafrLrPa7%252BqLD2Pgo5GTgCDTJgIpBMBHaBHcFvdVGNBWeIytK8U7x8RargP9Bv5VZgW5ZIFOd0UPibb3LqrST4ZksgyEE%252BmPe1A5DjvHpX9yLX4B%252BDOXahyXz5A1yTC9dFzis0sIiED5VsNEos3oK3EujAN7bV3HISc%252FgSNJLG5LFx2vp2CSDMKrynmu1yXQ2lrCGkPgyJmCDikW00rAGpq2SxxRE1W%252BlYtM9wcsVSylD5TbTAgAV0xJjyHqEQMruZVpvaa9bAbmc2uN%252Bwri%252B311wd7lwGuMFCkLXb8xOawqv5oGswFzOJqOhUGVwISMi40Eohv99jwhBfWG%252FU621sMLOKt72hvmlPuIOkCtHHxmv%252B19ARQ%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2023, 06:13:20 am
content: Quote from: BillyO on January 06, 2023, 02:11:02 amHere's some research for you on a properly made product:https://www.eevblog.com/forum/projects/guesses-on-what-i-am-attempting-here/

author: Peter Tryndoch
author_rank: Contributor
timestamp: January 07, 2023, 11:07:30 am
content: It does tell me the supply voltage/type OKWhich is the main thing.It doesn't tell me how to trigger, but I guess that I can work that outifI decide to get it.Thanks

author: Psi
author_rank: Super Contributor
timestamp: January 07, 2023, 11:37:29 am
content: it's almost defiantly using those 3 buttons.My guess is that one button will go up and one button will go down for the duration of the pulse displayed on the LED display.An the 3rd button will be to trigger it.

author: jpanhalt
author_rank: Super Contributor
timestamp: January 07, 2023, 12:07:41 pm
content: You might give that trigger some thought. A button would be pretty inconvenient in my experience. A foot switch is what I use for that and any welding that needs both hands, e.g., TIG.

author: Peter Tryndoch
author_rank: Contributor
timestamp: January 08, 2023, 06:54:44 am
content: Agreed. If it is a single button to activate, then I would knock up a foot switch.I have collected enough push buttons (and other things) over the yearsthat I will easily find something heavy duty enough to suit.

author: Dreddi
author_rank: Newbie
timestamp: January 08, 2023, 07:42:25 am
content: I have the kWeld and absolutely love it. I'd recommend it over anything but a production level machine.www.keenlab.de/index.php/product-category/kspot-welder-kit/https://youtu.be/DX1U3UnCej0

author: ledtester
author_rank: Super Contributor
timestamp: January 08, 2023, 08:14:56 am
content: Here's a video demonstrating its operation:https://youtu.be/hTQgXZBmejQLooks like it automatically detects when the probes are in contact with the strip.Here's a video on how to assemble and use a similar unit:https://youtu.be/I-sDn7Ic14IThis one only has 5 different power levels instead of 99 and it indicates the power level by a sequence of beeps instead of a digital display.Check out the chapters in the description. At 19:54 it shows how to operate the device.Here's a video which goes over some practical considerations of powering these kind of spot welders:Home-made spot welder (very powerful) -- Sorin - DIY Electrical Nerdhttps://youtu.be/SyPo8otfs1E