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Resistance soldering


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#1 Don Weaver

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Posted 30 November 2019 - 11:48 AM

Has anyone tried resistance soldering?  Expensive first time purchase but the results look good cosmetically.  Any idea if it would improve the quality of the joint?  

 

Don Weaver


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#2 MSwiss

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Posted 30 November 2019 - 12:06 PM

http://slotblog.net/...oldering +brass

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#3 Ecurie Martini

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Posted 30 November 2019 - 04:13 PM

0.040 steel to 1/16" brass:

 

gallery_99_685_106080.jpg


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Alan Schwartz

#4 Don Weaver

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Posted 30 November 2019 - 06:58 PM

Alan,

 

What unit did you use for this job?  Great looking weld joint...

 

Don


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#5 Ecurie Martini

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Posted 01 December 2019 - 01:09 AM

It's a commercial unit that I picked up on eBay - made by Luma

 

gallery_99_685_6222.jpg

 

There are three heat ranges set by connecting the electrodes between  A-B, A-C, and B-C and 5 steps in each range via rotary switch.  At the highest setting it's equivalent to ~ 900 watts!  I use it with a foot switch.  heating is essentially instantaneous.  For "awkward" work, you can pin the part in place with the carbon electrode, apply heat then switch off to let the joint cool while still holding it with the electrode - solder does not stick to the carbon.  One of the advantages is that heating at the point of application is so fast that there is not enough time to heat the adjacent area and melt other joints.

 

One of my prejudices is that most soldering problems come from poor preparation but using a too small iron runs a very close second. 

 

Al


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#6 Ecurie Martini

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Posted 01 December 2019 - 01:14 AM

https://www.lumaelectric.com/


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#7 Ecurie Martini

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Posted 01 December 2019 - 01:25 AM

PS - I do not use it when soldering to motor cans - don't want to find out what passing AC 60Hz current through the can would do to the magnets!


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#8 Don Weaver

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Posted 01 December 2019 - 07:25 AM

$800.00 just put an end to my curiosity!


Don Weaver

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#9 slotcarone

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Posted 01 December 2019 - 07:29 AM

If neat looking solder joints is the goal there is no reason that you could not get exactly the same results using traditional irons if done correctly.

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#10 Ecurie Martini

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Posted 01 December 2019 - 12:51 PM

$800.00 just put an end to my curiosity!

 

These might do as well - still not cheap and about half the power (but I've never used the "high" setting)

 

https://www.ebay.com...ectric&_sacat=0


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#11 Ecurie Martini

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Posted 01 December 2019 - 12:55 PM

attachicon.gifIMG_20130901_205018_085.jpgIf neat looking solder joints is the goal there is no reason that you could not get exactly the same results using traditional irons if done correctly.

 

Certainly correct - I was just responding with my experience and some attributes of the system.


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