Search found 319 matches

by tatus1969
Feb 17 2020 3:19am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

I got notified about an ebay auction of 800x BCAP0650P (new unopened, dated 2007, mix of laser weldable and threaded posts), tempted to purchase them. Anyone interested in these? I'd test them and sell for 6€ a piece.
by tatus1969
Jan 22 2020 5:17am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

I have some problems with my K-Weld. It stopped making welds.. it sparks but the weld is not there. I checked the battery, calibrated again and again.. however it doesnt weld, any known issues what i can look for ? That's not much info to diagnose :wink: Can you post all the info that the welder di...
by tatus1969
Jan 20 2020 5:40am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

There is a minimum voltage where weld quality gets pretty poor. i start noticing a reduction at 7.5V, do you experience the same? Welding power drops quadratically with voltage, so every bit is important here. I set the undervoltage detection of kWeld to 7.9V and use it as a safeguard to not attemp...
by tatus1969
Jan 17 2020 6:56am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

ElectricGod wrote:
Jan 16 2020 6:41pm
I'm set to 1000 amps...I think. =)
That can't be adjusted, it's always the short circuit current that just happens. To check the actual reading, keep the foot pedal down after a weld.
by tatus1969
Jan 16 2020 5:01am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

I'm wondering how good your welds are at 10 joules on .15mm nickel. I need more like 40-50 joules to get solid welds in .15mm. With such low power, it's not surprising your weld pens don't get hot. I think you need to turn up the power a lot. Just wanted to mention, there is nickel and there is nic...
by tatus1969
Jan 16 2020 4:56am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

No that is exactly what I want to do, I use a high capacity lipo but I don't want to just leave it with the screen on. Do you guys just leave it on or disconnect the battery? I rack my electrodes after I have finished welding so I am not worried about the transistors and the fuse would break anyway...
by tatus1969
Jan 16 2020 4:49am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

ElectricGod wrote:
Jan 15 2020 12:07am
Maybe the pics for the new super cap module are not up yet?
It looks like the ones I already have.
Haven't had time to shoot new pics, but that is on my todo list!
by tatus1969
Jan 16 2020 4:48am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Darren2018 wrote:
Jan 15 2020 8:49pm
If there isn't one can I put a switch in series with the capacitor?
You mean, between capacitor and welder? If you have a switch that is capable of carrying 2000A of current, then yes. Expect this to be hugely sized and priced :-)
by tatus1969
Jan 14 2020 8:06am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Seems to be newstime today... more good news, I finally managed to order new/redesigned kCap ultracapacitor modules and have started offering them for pre-order: https://www.keenlab.de/index.php/product/kweld-ultracapacitor-module/ (will also be available from the above US/AU resellers)! They now fe...
by tatus1969
Jan 14 2020 5:49am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Good news for you guys in Australia and around: Andrew from hiketech.au is starting to sell keenlab products here! https://hiketech.com.au/index.php?route=product/category&path=111 He's also working on introductory videos, and I'd appreciate if you'd support him by watching and recommending them (gi...
by tatus1969
Jan 10 2020 5:58am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Thankyou Tatus1969, keep doing what your doing you are awesome in a world of BS ! Thank for your great feedback 8) I paid over $90 Aud for shipping or 23% of the cost of the kit. I might soon have an AU reseller to mitigate that: https://hiketech.com.au/index.php?route=product/category&path=111 I h...
by tatus1969
Jan 03 2020 9:15am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

I'm looking at that picture and what comes to mind is that the small wire would be for a temperature sensor inside the probe assy. There are large bolts at the back end that could be used to attach the welding wires. Does that make sense? The cable will be the connection to a trigger switch that fi...
by tatus1969
Jan 02 2020 6:30am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Here is a crazy question for kWeld's creator, Mr. T. I recently bought a new AGM battery and both of my kWelds units complain of overcurrent when I try to calibrate them. If I swap the battery and electrode cables with thinner ones, I am able to successfully calibrate them but I know I am getting t...
by tatus1969
Dec 05 2019 3:50am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

I do not think anything that was deleted today from this thread was off topic. Every post contained relevance to batteries, welding, and the K-welds construction and operation capabilities. This is all I have to say here anymore. What happened, where's your last post? I can only add that nothing th...
by tatus1969
Dec 03 2019 6:20am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

bobmutch wrote:
Dec 02 2019 5:29pm
Another question my battery is a AGM AlphaCell 220GXL with 20hr109Ah, max discharge 900A, Impedance O.005Ohms, and 2800A short circuit, does this battery have to high amps or will it be fine?
Perfect specs for kWeld. How much pulse current does it report?
by tatus1969
Dec 03 2019 6:18am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

BTW: If I use lipo with kweld can I at the same time charge it through balance leads? It would keep it nicely full I think :roll:. I have used small charger with lead acid battery. There's one risk to that. The inductive kickback from terminating a pulse causes significant voltages for short period...
by tatus1969
Dec 03 2019 6:15am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

2. When you change from an approved LiPo battery to an approved SLA battery will the same 20J deliver the same energy to each weld with the two different batteries? I believe the answer is no: Yo must re calibrate, Bob. Whenever a ( different) battery is swapped the calibration is carried out. This...
by tatus1969
Nov 19 2019 6:19am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

Hi. This is my first post so I wanted to say hi to everyone. Hi everyone. I bought kWeld yesterday but I still have no choice what batteries to buy. What do you recommend for today? Can it be 4s or must it be 3s? Thank you all for the answers. This battery that I recommend on the kWeld product page...
by tatus1969
Nov 18 2019 9:06am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

tatus1969 A couple questions to tatus1969: 1. With the kweld the adjustment for different welds is in energy J. I'm just wondering if there will be a difference in the weld energy used in each weld when your battery is fully charged and when the battery is close to the LVC? or will the setting of 2...
by tatus1969
Nov 06 2019 5:02am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

ElectricGod wrote:
Nov 05 2019 6:11pm
After seeing that elephant and pile of poo picture, I'm wondering how that elephant did that in one "squatting".
Deduct 20% of that mass to account for that poor guy underneath :wink:
spinningmagnets wrote:
Nov 05 2019 8:16pm
Trying to find time to finish desired experiments.
Exciting! :bigthumb:
by tatus1969
Nov 05 2019 5:40am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

ElectricGod wrote:
Nov 04 2019 2:16pm
Image
Ahemm... can I get this reward paid out cash instead? 8) 8)
by tatus1969
Nov 01 2019 6:58am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

spinningmagnets wrote:
Oct 29 2019 2:39pm
"...would you mind commenting on probes. I imagine somewhere in the thread you have, but I''m at a loss finding that. Are any of these materials a potential improvement?..."

The kWeld electrode holders are ...
Thanks Ron, I was about to answer but nothing to add to this :D
by tatus1969
Oct 29 2019 6:24am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: KWeld and reflow solder paste

I was super curious to see how well solder paste would augment a spot weld Your results look very promising! One remark that matches your observations: solder paste contains not only flux but also chemicals that remove corrosion, which is why the recommended reflow profile usually starts with a pre...
by tatus1969
Oct 29 2019 6:05am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1030
Views: 138905

Re: kWeld - "Next level" DIY battery spot welder

tomjasz wrote:
Oct 25 2019 6:42pm
My POS dead Sunnko was $250. My new KWeld will be $234.

The real question is will they perform better?
Never owned a Sunkko, but I can tell that I have quite a few customers who told me that they have dumped their Sunkko after having used kWeld 8)