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Lead Free Soldering Iron

Discussion in 'Electronic Design' started by hamilton, Aug 19, 2012.

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  1. hamilton

    hamilton Guest

    What is the best temp for a soldering iron tip ?

    How does a tip stay "tinned" with lead free solder ?

    Does anyone have a good site on the basics of lead free soldering.

    Thank you

  2. mike

    mike Guest

    It's not that simple.
    You care about the temperature of the joint.
    With today's tiny components, you typically end up with
    a tiny tip with small heat capacity trying to raise the temperature
    of a larger area. The ground plane end of a cap is typically
    much harder to solder than the free end.

    Cheap irons attack the problem by raising the tip temperature
    so you can melt the solder with the heat capacity available in the tip.

    Weller irons have the temperature control mechanism right at the tip,
    so it can turn up power relatively quickly.

    Irons like the Metcal use RF and get VERY tight coupling between power
    input and temperature. First time I used a Metcal, I was amazed at how
    quickly a lower temperature tip could melt the joint.

    Plated tips don't stay "tinned" with lead solder either.
  3. Nico Coesel

    Nico Coesel Guest

    In my experience 230 deg. C is by far the best setting for lead free
    soldering. Leaded soldering isn't as picky as lead free soldering. The
    basic mistake I see most is using a tip which is too small for the
    soldering job at hand. Most people crank up the temperature to
    compensate for the poor heat conduction of the top but that will burn
    the flux from the solder too fast so you get bad joints due to
    insufficient flux. A good lead free solder joint should be a little
    less shiny than a leaded solder joint.

    So make sure you get 3 or 4 different sizes of tips and get a
    soldering iron which allows to change the tips quickly. I myself have
    an Ersa iron which uses a spring to hold the tip in place. I often
    change tips while putting a 'project' together.
  4. Guest

    At work we have a couple of Metcals at our soldering station. Each has two
    devices attached, an iron and a desoldering widget (tweezers and a solder
    sucker). There are also a variety of tips for desoldering SMT devices. Even
    with four "irons" connected, I'm always waiting for one to heat. ;-)
    ....and I don't do RoHS solder (but have to desolder the crap).
  5. miso

    miso Guest

    Are you trying to be green, or do you really need to use lead free
    solder? The amount of eco-waste Joe Experimenter can make won't
    significantly add to lead in the ecosystem.
  6. Metallic form leaded solder has NEVER "added lead to the eco-system".

    Metallic form lead is NOT dangerous. Never was.

    Euro-retards caused the entire industry to take a set back and the
    entire world to take a price hit as a result of their inane measures.

    Idiots casting their own fishing sinkers have a higher potential to
    have done more 'damage' over the decades and nobody has pissed and moaned
    about them.

    The world is full of idiots.
  7. Phil Allison

    Phil Allison Guest

    "Jan Panteltje"

    ** Are you nuts ?

    370C is the normal tip temp for regular, hand soldering.

    .... Phil
  8. Phil Allison

    Phil Allison Guest

    "Nico Coesel"

    ** Again - are you nuts ?

    230C will barely melt Pb free solder.

    The normal setting on a good iron like the " Hakko " is 370C or a tad more
    for Pb free.

    ..... Phil
  9. Phil Allison

    Phil Allison Guest

    ** The one that works well.

    ** Lead free solder is mostly 99% tin.

    ** I suggest that novices keep well away from Pb free solder.

    Most of it is a real PITA to use and getting good results is very tricky.

    The stuff with 1 or 2% silver is best, but a bit expensive.

    .... Phil
  10. Well... up to a point.
    Hahahahah... I like it.
    Why? They should have no opportunity to escape the realm of the
    Also not exactly true.
    I have found that the 2% Gold stuff is pretty good.

    I posted a picture of some. I had one roll then. Now I have several.
  11. miso

    miso Guest

    The theory is the old electronics ends up in the landfill and the lead
    leaches out eventually. Of course, reality could be different.
  12. hamilton

    hamilton Guest

    Products at work are Rhos.

    As a firmware/hardware guy, I need to solder onto some of these boards.

    Most of the time I let the techs do it.

    But lately I have been trying to do it myself.

    I to am from the old school of soldering and this lead free stuff is
    very UN-satsifying.

  13. Winston

    Winston Guest

    On Sun, 19 Aug 2012 10:47:43 -0700, mike wrote:

    /* Delurking

    Metcal! The best.


  14. miso

    miso Guest

    Well yeah, when the work!
  15. MrTallyman

    MrTallyman Guest

    We would have seen huge "lead-in-the-water-table" differences around
    landfills, and "favorite fishing holes", and especially around police
    firing ranges.

    Fact is... We do not.
  16. MrTallyman

    MrTallyman Guest

    The solder probably wants you to learn how to 'spell' "RoHS"
  17. Winston

    Winston Guest

    Mine always work properly.
    For years and years. :)

    I take it you've seen reliability problems?
    What symptom(s)?

    I was really pleased with Metcal support when I
    experienced a (cough) pilot error early on.

    Were they helpful in troubleshooting the
    issue(s) you identified?

  18. Jasen Betts

    Jasen Betts Guest

  19. Phil Allison

    Phil Allison Guest

    ** Thought so.

    ** Then FUCKING ASK THEM !!!!!!!!!

    You PITA fucking TROLLING SHIT !!!!!!!!!!!!

    ..... Phil
  20. [...]
    You left an 's' out of the penultimate word.
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