JP spot welder

[Mammalian04]

There is online battery modeler (free, simple and sophisticated) somewhere, I forgot to bookmark. I think it was linked by one of the Russian guys. If someone can link it again please.

I lost the link and tried to find it again also but without success.

 

[riba2233]

I'm about to buy the battery for the spot welder.

I'd also like to be able to spot weld 1mm aluminium or steel sheet.

Is this battery enough for that?
http://www.ebay.com/itm/251410202004

Hi, I can't give you any hard recommendation since I haven't tried welding such materials. I've only tried 0.25 mm aluminum and it's impossible, it just softens too much and cracks.

Battery you've linked should weld up to 0.2 mm nickel without any problem

 

[Allex]

There is online battery modeler (free, simple and sophisticated) somewhere, I forgot to bookmark. I think it was linked by one of the Russian guys. If someone can link it again please.

I lost the link and tried to find it again also but without success.

https://endless-sphere.com/forums/viewtopic.php?f=14&t=57291&start=325#p937551

and here is it in english: http://epowerbikes.ru/constructor-en.php

 

[parabellum]

There is online battery modeler (free, simple and sophisticated) somewhere, I forgot to bookmark. I think it was linked by one of the Russian guys. If someone can link it again please.

I lost the link and tried to find it again also but without success.

https://endless-sphere.com/forums/viewtopic.php?f=14&t=57291&start=325#p937551

and here is it in english: http://epowerbikes.ru/constructor-en.php

You are my hero.

 

[Mammalian04]

+1

Thanks Hero Allex!

 

[tomjasz]

https://endless-sphere.com/forums/viewtopic.php?f=14&t=57291&start=325#p937551

and here is it in english: http://epowerbikes.ru/constructor-en.php

Bummer, can't access the page or website....

500 Internal Server Error

nginx / 1.2.3

 

[fechter]

My welder arrived!

I tried using a small-ish 28Ahr lead-acid AGM battery. It seems to work fine with the standard nickel strip. If I crank it up, the welds are definitely too hot.

Test setup:


I also placed my oscilloscope on the gate leg of a FET to measure the timing. Looks great.
Here's with the knob about half way (10ms main pulse). Horizontal scale = 10ms/div. Vertical scale 5v/div.

 

[riba2233]

Whoa that's great, thank you!

 

[KarlJ]

got it cheers - IN Australia - only just as end of package had torn
(tape sides of international packages as they get a tough journey)

Assembly was about 20 mins (not including lopping off the lugged end off one cable to connect to the other side of the board
and then connection to a 175A anderson plug for my 40AH lifePO4 battery - this took a while even with an 50W iron)
only got stuck and needed to find instructions for which side was which on the LED's and the little resistors (suggest marking the resistors with values)

every other part of assembly and operation was very retard resistant!

Great toy

Next build some batteries!
Cheers Karl

 

[rwaudio]

My device arrived as well, very nicely made and well designed.
I think it's a little hot with 4 cells, (Sinopoly 100Ah cells) I'll probably drop down to 3 cells now that they're charged, not quite enough range on the dial on thinner material.
It is nice that you have a bit of extra control by selecting a suitable battery configuration.

I have a 168 cell pack and a 140 cell pack to build in the short term, I'll share the results.

 

[okashira]

My device arrived as well, very nicely made and well designed.
I think it's a little hot with 4 cells, (Sinopoly 100Ah cells) I'll probably drop down to 3 cells now that they're charged, not quite enough range on the dial on thinner material.
It is nice that you have a bit of extra control by selecting a suitable battery configuration.

I have a 168 cell pack and a 140 cell pack to build in the short term, I'll share the results.

I run two cells at 4.05V each. (Model S module, about 0.4 mOhm per cell pulse DCIR). And weld up to 0.3mm nickel

 

[rwaudio]

I run two cells at 4.05V each. (Model S module, about 0.4 mOhm per cell pulse DCIR). And weld up to 0.3mm nickel

I reconfigured for 3S and it works perfect.
These are the reject Sinopoly cells from a car, they have high IR and some self discharge, might get away with 2S using good cells, but this gives new life to otherwise useless cells.

 

[riba2233]

That's great guys, thank you for feedback!
Yeah, 3S with lithium is more than enough. Even 2S is fine if batteries are ok.

 

[cwah]

Can I charge my 12v car battery with my power supply? Shall I just set it to 12v and that's all fine?

Thanks

 

[cycborg]

Can I charge my 12v car battery with my power supply? Shall I just set it to 12v and that's all fine?

The SLA charge profile is different from lithium - you should use an SLA-specific charger. Something like a trickle/maintenance charger for motorcycle batteries should work fine. Or if you have a Satiator, it will do an SLA profile, as will some hobby chargers.

 

[riba2233]

Can I charge my 12v car battery with my power supply? Shall I just set it to 12v and that's all fine?

Thanks

Can I charge my 12v car battery with my power supply? Shall I just set it to 12v and that's all fine?

The SLA charge profile is different from lithium - you should use an SLA-specific charger. Something like a trickle/maintenance charger for motorcycle batteries should work fine. Or if you have a Satiator, it will do an SLA profile, as will some hobby chargers.

Yeah, lead battery should be charged to at least 14 V. Although some older 12 V supplies like one I'm using will provide close to 16 V OCV so maybe they could charge lead battery slowly, but you would still have to watch the voltage, you don't want to go over ~14.5 V on lead battery.

 

[cwah]

i don't really want to buy an extra charger just for charging lead acid.. it's old technology and won't be used outside.....

So if I set voltage to 14V that should be fine?

 

[riba2233]

Oh now I've remembered, you have that adjustable power supply In that case, if you want to charge it, set it on 14.4 V, and if you want to slowly charge or float, set it to 13.8 V.

 

[Wheazel]

Also got my JP welder, will be some weeks before I try it out, but then I can compare it with my sunkko 788+ and see what I think.
Im guessing the JP will have more "grunt".

 

[tomjasz]

My welder arrived!

Hey! That's my bench!

 

[riba2233]

Also got my JP welder, will be some weeks before I try it out, but then I can compare it with my sunkko 788+ and see what I think.
Im guessing the JP will have more "grunt".

Please tell us the results

 

[cwah]

Will do thanks riba

 

[marty]

My welder arrived!

I tried using a small-ish 28Ahr lead-acid AGM battery. It seems to work fine with the standard nickel strip. If I crank it up, the welds are definitely too hot.

Test setup:
View attachment 2

I also placed my oscilloscope on the gate leg of a FET to measure the timing. Looks great.
Here's with the knob about half way (10ms main pulse). Horizontal scale = 10ms/div. Vertical scale 5v/div.

View attachment 1

What type of battery terminals are on that battery? I crop and blow up Fechter's picture.

 

[dssguy1]

i don't really want to buy an extra charger just for charging lead acid.. it's old technology and won't be used outside.....

So if I set voltage to 14V that should be fine?

I use a Battery Tender Jr, they cost ~$15 and have 6-8 different programs they automatically use to keep a lead acid battery properly charged.

 

[seb13]

Hello,
PM sent, interested in a DIY kit