JP spot welder

Place for dealers to post items for sale.
User avatar
Wheazel   10 kW

10 kW
Posts: 967
Joined: Nov 02 2010 2:30pm
Location: Sundsvall, Sweden

Re: JP spot welder

Post by Wheazel » Sep 18 2015 4:34am

Hi Riba

Could you put me on the list and notify when they are available?
I want a replacement/backup for my china spotwelder incase it fails.

User avatar
riba2233   1 MW

1 MW
Posts: 1847
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: JP spot welder

Post by riba2233 » Sep 18 2015 5:03am

Sure, no problem, thank you! :)
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

User avatar
Allex   1 GW

1 GW
Posts: 3230
Joined: Dec 05 2011 8:46am
Location: Stockholm, Sweden

Re: JP spot welder

Post by Allex » Sep 18 2015 5:39am

riba2233 wrote:Lol that's really interesting :) I'll send you new ones, don't worry.
Hey! Got the new rod from ya. 20Cm will get me a few years welding :)
Again, great service from Riba!

User avatar
ridethelightning   1 MW

1 MW
Posts: 1869
Joined: Jul 21 2013 9:48pm

Re: JP spot welder

Post by ridethelightning » Sep 18 2015 6:42am

just found a bit of gold here, really good info for honing spotwelding skills.. :P, some of the finer points of spotwelding(no pun intended)
http://www.microjoining.com/articles/Do ... elding.pdf

Sr.Agaporni   100 W

100 W
Posts: 139
Joined: Jun 10 2014 4:46am
Location: Benidorm, Spain

Re: JP spot welder

Post by Sr.Agaporni » Sep 18 2015 12:36pm

ridethelightning wrote:just found a bit of gold here, really good info for honing spotwelding skills.. :P, some of the finer points of spotwelding(no pun intended)
http://www.microjoining.com/articles/Do ... elding.pdf
That is quite technical but incredible interesting information. Thanks mate.

User avatar
fechter   100 GW

100 GW
Posts: 14638
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: JP spot welder

Post by fechter » Sep 18 2015 6:21pm

That was an interesting article. Here's one thing I picked out:
Pure copper should never be used for spot welding electrodes because of its poor tolerance to mechanical abrasion and plastic deformation due to repeated heat cycling. Special copper alloys, reinforced with chromium or zirconium, are much more
durable and tolerate heavy heat cycling. These special copper alloys are used to weld thermally resistive metals such as iron, nickel, and stainless steel. Welding thermally conductive copper and brass alloys requires the use molybdenum or tungsten tipped copper shank electrodes. These electrically resistive materials generate a significant amount of heat that is “drawn” into thermally conductive parts to help with the weld nugget formation.
I guess as long as we are OK with "limited" electrode life, the pure copper ones might be acceptable.

I tested the soldering iron tips I had, and they appear to be copper with heavy iron plating. There's enough iron for it to stick to a magnet but the iron is very thin compared to the body. The shape is very nice though.
"One test is worth a thousand opinions"

User avatar
tomjasz   10 GW

10 GW
Posts: 4208
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: JP spot welder

Post by tomjasz » Sep 18 2015 7:18pm

fechter wrote:
I guess as long as we are OK with "limited" electrode life, the pure copper ones might be acceptable.

I tested the soldering iron tips I had, and they appear to be copper with heavy iron plating. There's enough iron for it to stick to a magnet but the iron is very thin compared to the body. The shape is very nice though.
Sunkko references "alumina copper" needle.
But given Chinglish it's hard to know what it is.

The pens appear to use the same.
"The welding needle is import oxygen aluminum alloy,long life cycle."

http://www.aliexpress.com/item/1-5-45MM ... 78502.html
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
Kepler   1 GW

1 GW
Posts: 3239
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

Re: JP spot welder

Post by Kepler » Sep 19 2015 3:39am

Got my Spot Welder a couple of weeks ago. Thanks riba. Been tossing up whether to buy a car battery or use some cells I have lying around. Decided to give a bunch of Headways ago despite the general consensus being that they wouldn't cut it.

Started with a 2S3P setup giving a nominal 6.6V and 30ah. Managed to get a weak weld out of the setup using 0.15 nickel. Cranking up the m/s actually made the weld weaker. A promising start nevertheless.

Added another 4 cells to lift the pack capacity to 2S5P and 50ah. Tried a few more test welds. This time we had some sparks flying. Around 10m/s seemed to give a nice strong clean weld.

Looks like I don't need to spend more cash on a car battery. Very pleased with the result and ready to put together my first pack.
20150919_164607 (1).jpg
20150919_164607 (1).jpg (201.6 KiB) Viewed 3037 times
20150919_164647 (1).jpg
20150919_164647 (1).jpg (167.24 KiB) Viewed 3037 times
20150919_165001.jpg
20150919_165001.jpg (108.85 KiB) Viewed 3037 times
20150919_164825 (1).jpg
20150919_164825 (1).jpg (96.76 KiB) Viewed 3037 times
20150919_164806.jpg
20150919_164806.jpg (158.66 KiB) Viewed 3037 times
Current Rides

Lightest true ebike on the planet: ON ROAD viewtopic.php?f=6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/

markz   100 GW

100 GW
Posts: 8484
Joined: Jan 09 2014 11:38pm
Location: Alberta Canada

Re: JP spot welder

Post by markz » Sep 19 2015 3:41am

Hit up the junk yards, car/truck batteries are cheap. I have not hit up a big rig junk yards yet I think those batteries are 24V plus the cranking amps are probably HUGE!

User avatar
ridethelightning   1 MW

1 MW
Posts: 1869
Joined: Jul 21 2013 9:48pm

Re: JP spot welder

Post by ridethelightning » Sep 19 2015 7:31am

awesome!
I was just thinking about the 30 odd headways i have lying around, still in good shape but i just dont use them anymore.
thanks for the pics.
cant wait to get my jpwelder..when the next run comes.

cwah   10 GW

10 GW
Posts: 4214
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: JP spot welder

Post by cwah » Sep 19 2015 10:25am

Kepler wrote:Got my Spot Welder a couple of weeks ago. Thanks riba. Been tossing up whether to buy a car battery or use some cells I have lying around. Decided to give a bunch of Headways ago despite the general consensus being that they wouldn't cut it.

Started with a 2S3P setup giving a nominal 6.6V and 30ah. Managed to get a weak weld out of the setup using 0.15 nickel. Cranking up the m/s actually made the weld weaker. A promising start nevertheless.

Added another 4 cells to lift the pack capacity to 2S5P and 50ah. Tried a few more test welds. This time we had some sparks flying. Around 10m/s seemed to give a nice strong clean weld.

Looks like I don't need to spend more cash on a car battery. Very pleased with the result and ready to put together my first pack.
20150919_164607 (1).jpg
20150919_164647 (1).jpg
20150919_165001.jpg
20150919_164825 (1).jpg
20150919_164806.jpg
Are you saying you can do nice weld with only 10 cells at 2s5p and a 330wh pack?
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

User avatar
riba2233   1 MW

1 MW
Posts: 1847
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: JP spot welder

Post by riba2233 » Sep 19 2015 10:43am

That looks really nice kepler! Welds look just like they should.


About electrode material - pure copper is easy to find and really cheap, and works just fine but wears faster. But since most people don't weld that much, I think it's a rational choice, because it would be unrational to bump up the price, and not everybody will benefit from that. Someone who welds more can buy better electrodes from sunstone, 3/16 inch is the right measure, almost 5 mm like my electrode tip are. Also, if somone wants, I can always sell welder only, and one can buy whole electrodes with cables from sunkko (around 80$ plus shipping and tax) or sunstone, they have various models, but are around 300-400$. But for most users my electrodes and tips are more than enough 8)
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

User avatar
bigbore   10 kW

10 kW
Posts: 531
Joined: Sep 25 2009 7:43am
Location: Italy

Re: JP spot welder

Post by bigbore » Sep 19 2015 4:29pm

Kepler wrote:Got my Spot Welder a couple of weeks ago. Thanks riba. Been tossing up whether to buy a car battery or use some cells I have lying around. Decided to give a bunch of Headways ago despite the general consensus being that they wouldn't cut it.

Started with a 2S3P setup giving a nominal 6.6V and 30ah. Managed to get a weak weld out of the setup using 0.15 nickel. Cranking up the m/s actually made the weld weaker. A promising start nevertheless.

Added another 4 cells to lift the pack capacity to 2S5P and 50ah. Tried a few more test welds. This time we had some sparks flying. Around 10m/s seemed to give a nice strong clean weld.

Looks like I don't need to spend more cash on a car battery. Very pleased with the result and ready to put together my first pack.
20150919_164607 (1).jpg
20150919_164647 (1).jpg
20150919_165001.jpg
20150919_164825 (1).jpg
20150919_164806.jpg
I'm going to buy one of these spot welder too as soon as the new batch will be ready. I have some zippy 5000 40C LiPo that I do not use any more and I thought that a 3S would be good. Anybody tried a 3S or a 4S with the welder? Is too much 16,8V for the circuit?

district9prawn   100 W

100 W
Posts: 278
Joined: Jul 20 2013 10:46pm
Location: Sydney

Re: JP spot welder

Post by district9prawn » Sep 19 2015 7:47pm

bigbore wrote:I'm going to buy one of these spot welder too as soon as the new batch will be ready. I have some zippy 5000 40C LiPo that I do not use any more and I thought that a 3S would be good. Anybody tried a 3S or a 4S with the welder? Is too much 16,8V for the circuit?
I'm getting by fine with 2s of nanotechs despite my connections not being particularly fat.
Neu 8057 6kW left hand drive hardtail with 18 fet Vesc: viewtopic.php?f=6&t=96754

User avatar
Kepler   1 GW

1 GW
Posts: 3239
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

Re: JP spot welder

Post by Kepler » Sep 19 2015 8:49pm

cwah wrote:
Are you saying you can do nice weld with only 10 cells at 2s5p and a 330wh pack?
Sure seems that way. Will do a bit more testing today but the welds look superb. A might add another 2 cells just to give it a bit more headroom seeing I have the cells lying around doing nothing.
Current Rides

Lightest true ebike on the planet: ON ROAD viewtopic.php?f=6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/

Rodney64   1 MW

1 MW
Posts: 1851
Joined: Mar 30 2012 4:00am
Location: Perth Western Australia

Re: JP spot welder

Post by Rodney64 » Sep 19 2015 9:55pm

Im going to use a 12 volt car battery from my lancer. Changed it about 3 months ago. It's still ok so I'll see how I go. All I need to do is buy the clamps for the batteries. I feel comftable building the pack. My old concern is then adding the ballance wires. I'll be using 4S JSTs so I'll plug into the adaptto BMS.

Mammalian04   100 kW

100 kW
Posts: 1103
Joined: Apr 26 2014 3:26am
Location: Austin, Texas

Re: JP spot welder

Post by Mammalian04 » Sep 19 2015 11:00pm

Rodney64 wrote:Im going to use a 12 volt car battery from my lancer. Changed it about 3 months ago. It's still ok so I'll see how I go. All I need to do is buy the clamps for the batteries. I feel comftable building the pack. My old concern is then adding the ballance wires. I'll be using 4S JSTs so I'll plug into the adaptto BMS.
Right there with you Rod. That seems like the part that is easier to mess up.

I'll probably be doing 4s as well to keep things simple for the adaptto.

mrzed   100 W

100 W
Posts: 239
Joined: Feb 06 2009 6:48pm
Location: Victoria Canada

Re: JP spot welder

Post by mrzed » Sep 20 2015 12:13am

I've been wondering about this. I'm a newb/hack with basically no electronics experience or skills. Still, just got my welder, and I would've thought it would be much easier to solder the balance wires on before spot welding the pack together.

User avatar
riba2233   1 MW

1 MW
Posts: 1847
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: JP spot welder

Post by riba2233 » Sep 20 2015 4:37am

@bigbore - thanks, I've added you on the list! 3S is maximum I recommend with lithium batteries.

@mrzed - you could add balance wires later, but it's questionable whether that's worth doing, there's no problem in adding them later. Just solder between cells, on nickel, that way you're not heating cells at all. Also, use paper washers on top of cells if you are going to do any soldering on nickel that's on the cells. Another approach is to extend nickel tapes past the cells, flop it so it's on the side of the cell, and solder balance wires there.
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

User avatar
Kepler   1 GW

1 GW
Posts: 3239
Joined: Nov 08 2009 9:22pm
Location: Eastern suburbs Melbourne Australia

Re: JP spot welder

Post by Kepler » Sep 20 2015 5:49am

Gone to a 2S6P config now giving 6.6V and 60ah. Not sure if it was really necessary but I feel happier with a bit more headroom. The test welds are strong and consistent. Fitted dual charging leads so I can charge each 1S cluster of a separate charger.
20150920_152037.jpg
20150920_152037.jpg (232.95 KiB) Viewed 2919 times
20150920_152122.jpg
20150920_152122.jpg (214.23 KiB) Viewed 2919 times
Current Rides

Lightest true ebike on the planet: ON ROAD viewtopic.php?f=6&t=74269
eBoost on facebook: http://www.facebook.com/pages/Eboost/200306283342024/

User avatar
ridethelightning   1 MW

1 MW
Posts: 1869
Joined: Jul 21 2013 9:48pm

Re: JP spot welder

Post by ridethelightning » Sep 20 2015 6:10am

ooooH!
that looks sweet!

i wonder how it would work on 0.10mm copper sheet with tungsten tipped electrodes....

User avatar
riba2233   1 MW

1 MW
Posts: 1847
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: JP spot welder

Post by riba2233 » Sep 20 2015 6:11am

Looks very nice! :)
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

Rodney64   1 MW

1 MW
Posts: 1851
Joined: Mar 30 2012 4:00am
Location: Perth Western Australia

Re: JP spot welder

Post by Rodney64 » Sep 20 2015 6:24am

I have my spot welder working now, The battery is powered and not making a good welds. But as Kepler said its working so a good first effort.m

Image

I'm not sure what the amps are but here's the battery.

Image

setup as it is currently

Image


Ribba, my power supply's 9 volt and 500Mamp. Will 9 volt be ok or do I need the 12 volt supply?

User avatar
riba2233   1 MW

1 MW
Posts: 1847
Joined: Jun 30 2013 10:23am
Location: Croatia

Re: JP spot welder

Post by riba2233 » Sep 20 2015 6:45am

9 volts should be fine. But the problem could be that really thin cables on your battery. You should buy proper clamps and use their bolts to connect welder and electrode.

Image




Also, be sure that your battery is fully charged :) If none of this works, it's possible that the battery is half-dead.

I also recommend that you practice welds on some scrap batteries before going onto real pack.
My electric moped: http://www.evalbum.com/4966

My electric car: http://www.evalbum.com/5364

Rodney64   1 MW

1 MW
Posts: 1851
Joined: Mar 30 2012 4:00am
Location: Perth Western Australia

Re: JP spot welder

Post by Rodney64 » Sep 20 2015 6:47am

riba2233 wrote:9 volts should be fine. But the problem could be that really thin cables on your battery. You should buy proper clamps and use their bolts to connect welder and electrode.

Image




Also, be sure that your battery is fully charged :) If none of this works, it's possible that the battery is half-dead.

I also recommend that you practice welds on some scrap batteries before going onto real pack.

Yes I was thinking that riba. I'll get those clamps tomorrow before buying or finding another battery and I'll find on old laptop battery to practise on.
Last edited by Rodney64 on Sep 20 2015 8:13am, edited 1 time in total.

Post Reply