Ed,
So I went on line to find you a link. Oh No looks like the company shutdown.
Tis is what it looked like:
https://www.youtube.com/watch?v=oZg80Tm-PAE
I love mine.
Bob
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Edward Rios
Sent: Monday, June 22, 2020 5:59 PM
To: [log in to unmask]
Subject: Re: [TN] installing and hand washing as a final step
Bob,
I'm not familiar with that process (little steam sprayers). What company is that from?
TIA,
Ed Rios
On Mon, Jun 22, 2020 at 4:19 PM Robert Kondner <[log in to unmask]>
wrote:
> Hi,
>
> I agree that hand cleaning is terrible.
>
> The only "Hand" process I have liked is one of the little steam
> sprayers filled with distilled water.
>
> Bob K.
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Richard Kraszewski
> Sent: Monday, June 22, 2020 12:26 PM
> To: [log in to unmask]
> Subject: Re: [TN] installing and hand washing as a final step
>
> I agree with you Phil.
> We never allow manual (hand) washing of assemblies with water only or
> semi-aqueous cleaners.
> Only time we allow a manual process is for localized cleaning with
> specified (non-water based) solvent cleaners. Even then only if the
> assembly is not suitable for an inline cleaning process.
> Also IPA is not what we consider a suitable solvent for cleaning flux
> residues.
>
> Rich Kraszewski
> Plexus Senior Staff Process Engineer
>
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> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Nutting, Phil
> Sent: Saturday, June 20, 2020 9:04 AM
> To: [log in to unmask]
> Subject: [TN] installing and hand washing as a final step
>
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> .
> Hi All,
>
> I hope you have all been able to avoid becoming ill.
>
> We have found some components (presumed) to be problematic when
> machine washed. Avago optos, TI PTH logic (yes, we still do
> thru-hole), film capacitors, trim pots and some other components are
> usually the offending parts. These components are then designated to
> be hand installed, soldered and washed after the boards are machine installed, solder and washed.
>
> I fear the '70s are coming back.
>
> About 80% of our PTH boards and 100% of our SMT boards are built by CMs.
> We
> do not specify solder, flux or cleaning systems. We do however
> specify lead-free and a cleanliness standard. In-house PTH boards are
> washed in a closed loop batch DI washer.
>
> I'm not a fan of switching to hand solder and wash for the simple
> reasons of hand soldering is less consistent and hand cleaning may
> just spread residue to a wider area.
>
> I know I'm possibly opening a can of worms for process control, water
> pressure, wash chemicals, choice of flux/paste. Is this a common
> manufacturing solution? To me this is like fingernails on a chalkboard.
>
> Phil Nutting | HVP Senior Development Engineer | Excelitas
> Technologies
> Corp
>
> Lab: +1 978.224.4332 | Office: +1 978.224.4152
> 35 Congress St, Salem, MA 01970 USA
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