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Solder paste.. why is it so hard to work with?

M

MassiveProng

Jan 1, 1970
0
not without flux.


Sure it would. It would leave icicles, and all kinds of other
nasties like dross inclusions, etc., but it most certainly would tin
it in the strictest sense of the term.

Now, from an electrical industry quality POV, not only would flux be
needed, but his practice would NOT be embraced, and even be considered
nix.
 
R

Rich Grise

Jan 1, 1970
0
not without flux.

Yeah, sorry I neglected to mention that. When I was working for that
battery charger guy, they'd crimp lugs onto the wires (up to like AWG 2
and such), verify a good crimp, and dip them in a solder pot. But before
we dipped them in the solder, we'd dip them in a little jug of liquid
flux.

I had heard that crimps shouldn't be soldered, but they never seemed to
have any problems. Probably because of the crimp - all the solder would
do is exclude air; it wouldn't actually be part of the circuit. (If we
just soldered the big fat wires into the lugs we wouldn't need fusible
links. ;-) )

Cheers!
Rich
 
H

Homer J Simpson

Jan 1, 1970
0
Just wondering - what would happen if you took the bare board, cleaned
it up with some fine steel wool, preheated it to, say, 250F, and plopped
it on top of a puddle of molten solder? Would it tin the whole thing?

That's how we used to do it. We had a cast iron bath made up which we filled
with solder. We sprayed the cleaned boards with a liquid flux, loaded all
the components and then rocked them through the bath (one edge then rotate
to the other edge) to solder them.

--
..

--
..
..
..
..
..
..
..
..

--
 
M

MassiveProng

Jan 1, 1970
0
That's how we used to do it. We had a cast iron bath made up which we filled
with solder. We sprayed the cleaned boards with a liquid flux, loaded all
the components and then rocked them through the bath (one edge then rotate
to the other edge) to solder them.


Using fine steel wool (or any steel wool) on a PCB is as retarded as
it gets.

LIQUID FLUX and a cloth rub is all the abrading a surface needs to
be prepped for tinning.
 
J

joseph2k

Jan 1, 1970
0
Rich said:
Yeah, sorry I neglected to mention that. When I was working for that
battery charger guy, they'd crimp lugs onto the wires (up to like AWG 2
and such), verify a good crimp, and dip them in a solder pot. But before
we dipped them in the solder, we'd dip them in a little jug of liquid
flux.

I had heard that crimps shouldn't be soldered, but they never seemed to
have any problems. Probably because of the crimp - all the solder would
do is exclude air; it wouldn't actually be part of the circuit. (If we
just soldered the big fat wires into the lugs we wouldn't need fusible
links. ;-) )

Cheers!
Rich

Actually the solder was an anti-corrosion coating. Other than that, crimp
connections do not benefit from soldering.
 
G

GregS

Jan 1, 1970
0
Actually the solder was an anti-corrosion coating. Other than that, crimp
connections do not benefit from soldering.


Except the ones I find all the time in consumer equipment.

greg
 
J

joseph2k

Jan 1, 1970
0
GregS said:
Except the ones I find all the time in consumer equipment.

greg

Well yes, crimping does benefit from properly trained assemblers with
properly operating tools.
Of course this is easily detectable as being more expensive ("What you mean
'crimp tool has limited life', just squeeze harder." "But it is an air
operated tool, squeezing harder does not apply. The jaws have a lifetime
of about 10,000 crimps, ane then should be replaced." "You crazy, i can't
afford down time 6 times a day. We replace once a month, like always.")
 
M

MassiveProng

Jan 1, 1970
0
Well yes, crimping does benefit from properly trained assemblers with
properly operating tools.

Read it again, dingledorf. He said that crimping does not benefit
from soldering afterward, and for small gauges, it is 100% accurate.
Of course this is easily detectable as being more expensive ("What you mean
'crimp tool has limited life', just squeeze harder."

We don't need a primer on proper crimper utilization. Modern
crimpers are far more accurate than those of even ten years ago.

Not talking about mil pin crimpers here, just the run of the mill
stuff.
"But it is an air
operated tool, squeezing harder does not apply.

You assume a lot.
The jaws have a lifetime
of about 10,000 crimps, ane then should be replaced."

Crimping machines as well as DIEs vary.
"You crazy, i can't
afford down time 6 times a day. We replace once a month, like always.")

You forgot to add the racist inflection notation, but I still caught
you at it.
 
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