[sdiy] top soldering through hole
Candace Hazelwood
candacemhazelwood at gmail.com
Wed Feb 14 21:15:14 CET 2018
I work at a microcontroller company PJRC and when we prototype we just wash the liquid flux off with running water for a few minutes and then put in oven at 150 for 20 minutes
Sent from my iPhone
> On Feb 14, 2018, at 11:13 AM, Jason Proctor <jason at redfish.net> wrote:
>
> right - for nocturnal post-wash drying i've used a heat gun on the lowest setting - and usually from a distance!
>
>
>
>
>
>
>> On Wed, Feb 14, 2018 at 11:08 AM, Pete Hartman <pete.hartman at gmail.com> wrote:
>> Good point Jason. I usually swing the board about and dry with a fluffy towel myself (rarely am I soldering during daylight). If I was doing it 100% right I'd have an air compressor handy to blow dry it.
>>
>>> On Wed, Feb 14, 2018 at 1:01 PM, Jason Proctor <jason at redfish.net> wrote:
>>> wash with soapy water, rinse with cleanest water available, dry in sun
>>>
>>> the way to a shiny new flux-free board
>>>
>>>
>>>> On Wed, Feb 14, 2018 at 10:48 AM, MTG <grant at musictechnologiesgroup.com> wrote:
>>>> Wash with what and dry how? I've never water washed a board before.
>>>>
>>>> GB
>>>>
>>>>> On 2/14/2018 10:29 AM, Jason Proctor wrote:
>>>>> same here -- 331 -> wash -> 44 for the rest. the boards are very clean and i've never had a single problem.
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Feb 14, 2018 at 10:15 AM, David Moylan <dave at westphila.net <mailto:dave at westphila.net>> wrote:
>>>>>
>>>>> I'm also using 331 water soluble for most components, then a board
>>>>> wash. Blame Paul Schreiber.
>>>>>
>>>>>
>>>>> On 02/14/2018 09:13 AM, Ian Fritz wrote:
>>>>>
>>>>> I use Kester 44, never clean the flux, and boards I built 40
>>>>> years ago are still fine. Absorbs water? Corrodes? Somebody
>>>>> please come over and show me, because I can't see any of that.
>>>>>
>>>>> Always solder from the top, too.
>>>>>
>>>>> Ian
>>>>>
>>>>>
>>>>>
>>>>> On 2/14/2018 8:59 AM, Quincas Moreira wrote:
>>>>>
>>>>> I use a local brand, Steren, 60/40
>>>>> http://www.steren.com.mx/rollo-de-100-gramos-de-soldadura-con-aleacion-estano-plomo-60-40.html
>>>>> <http://www.steren.com.mx/rollo-de-100-gramos-de-soldadura-con-aleacion-estano-plomo-60-40.html>
>>>>>
>>>>>
>>>>> Yeah I guess it's not no clean, just regular leaded. I just
>>>>> never felt like enough flux got on the boards to warrant
>>>>> cleaning. I probably should though, if it's corrosive in the
>>>>> long run. I've only been doing this for 7 years, maybe I'll
>>>>> find out in 20 that I should have been cleaning all along!
>>>>>
>>>>> What should I use to clean then?
>>>>>
>>>>> Thanks Pete
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Feb 14, 2018 at 8:59 AM, Pete Hartman
>>>>> <pete.hartman at gmail.com <mailto:pete.hartman at gmail.com>
>>>>> <mailto:pete.hartman at gmail.com
>>>>>
>>>>> <mailto:pete.hartman at gmail.com>>> wrote:
>>>>>
>>>>> What type of solder are you using? Brand and model?
>>>>>
>>>>> I use Kester 331 water soluble flux solder for early
>>>>> components
>>>>> (stuff that can get wet), and it comes off the board
>>>>> entirely with a
>>>>> brush (nylon bristles, like a really big toothbrush)
>>>>> and warm/hot
>>>>> water. Thing about it is, if I were using it on the
>>>>> top and it were
>>>>> getting under components it would take more like an
>>>>> ultrasonic bath
>>>>> to clean and get flux out from under resistors and
>>>>> things, and if
>>>>> you don't clean it, the stuff is corrosive in the
>>>>> longer run.
>>>>>
>>>>> I finish up for things that can't get wet (pots etc)
>>>>> with Kester 245
>>>>> no-clean. It does leave some residue, but the main
>>>>> point is that
>>>>> it's not meant to be cleaned off normally, and it
>>>>> doesn't leave
>>>>> enough to look like some of the messes I've seen. I
>>>>> also use it for
>>>>> any top solder touch ups.
>>>>>
>>>>> I've seen some really nasty work come across my
>>>>> workbench for
>>>>> repair, stuff with 331 flux still on it after who knows
>>>>> how long,
>>>>> stuff with ancient rosin flux with the black and brown
>>>>> lava flows
>>>>> all over it.
>>>>>
>>>>> I figure if you're not using no-clean, you'd know it :)
>>>>>
>>>>> Pete
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Feb 14, 2018 at 8:15 AM, Quincas Moreira
>>>>> <quincas at gmail.com <mailto:quincas at gmail.com>
>>>>> <mailto:quincas at gmail.com <mailto:quincas at gmail.com>>>
>>>>> wrote:
>>>>>
>>>>> I’ve never cleaned a board, ever... Maybe I’m using
>>>>> no clean
>>>>> solder and didn’t even know it, I just never felt
>>>>> the need. My
>>>>> builds look clean enough to me. Am I trippin’?
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>> On Feb 14, 2018, at 07:33, Pete Hartman
>>>>> <pete.hartman at gmail.com <mailto:pete.hartman at gmail.com>
>>>>> <mailto:pete.hartman at gmail.com
>>>>> <mailto:pete.hartman at gmail.com>>> wrote:
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Feb 14, 2018 at 7:25 AM, Mattias
>>>>> Rickardsson
>>>>> <mr at analogue.org <mailto:mr at analogue.org>
>>>>> <mailto:mr at analogue.org <mailto:mr at analogue.org>>> wrote:
>>>>>
>>>>> Top side is much simpler, I'll never go
>>>>> back - but
>>>>> probably a bit trickier to get clean from
>>>>> flux etc?
>>>>>
>>>>>
>>>>> I think this is the main reason I still
>>>>> primarily bottom
>>>>> solder, but I check my joints and if I have
>>>>> ones that didn't
>>>>> wick up to the top I'll touch them up with
>>>>> no-clean.
>>>>>
>>>>> Pete
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> -- Quincas Moreira
>>>>> Test Pilot at VBrazil Modular
>>>>>
>>>>>
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