Steve,

The last paragraph says it all, from my experience.

Richard Hamilton
Clemar Mfg. / Rain Bird
[log in to unmask]

> -----Original Message-----
> From: SteveZeva [SMTP:[log in to unmask]]
> Sent: Thursday, March 26, 1998 4:49 PM
> To:   [log in to unmask]
> Subject:      Re: [TN] ASSY: PARTS SOLDERABILITY
>
> Jim,
>
>      Well, since I'm not employed at a assembly company (not at the
> moment
> anyway...hehehe), I'll share what has happened at other companies that
> I've
> worked at regarding any sort of solderability testing...
>
>      I get the sneaking suspicion that there won't be many responses
> that say
> they don't do solderability testing, which IMHO is probably the norm
> rather
> than the exception...if I'm wrong go ahead and flame me, but I think
> that most
> of the time nowadays with the "demand-flow" of materials, there
> probably isn't
> near the solderability problems with components or PCB's that there
> used to
> be...parts and PCB's don't sit on a shelf for months and months
> anymore and
> become oxidized and unsolderable, it's too competitive out there...if
> they
> did, I'd bet there would be some Materials managers and buyers handed
> their
> walking papers.
>
> So nowadays in my opinion, the only time that there is solderability
> testing
> done (I'm speaking in pretty general terms now...) is when there IS a
> problem,
> after the fact, so they can have some ammo to be able to give the
> parts or
> PCB's back to who, or where ever they came from, or when there's some
> sort of
> survey or audit coming.
>
> I do think that may be changing as more and more companies are getting
> into
> no-clean...you have something hit the floor that ain't solderable when
> you're
> no-clean and it'll kill ya'...
>
> If it sounds like I'm being too pessamistic, maybe so...but I know
> there's
> been other M.E.'s or process engineers just like me who have been
> tasked to
> set-up a incoming recieving inspection area complete with all the
> latest "doo-
> dads" (wetting balance, viscosity meter and hot plates for solder
> paste,
> etc...) to check for problems before they hit the floor...it makes ya'
> feel
> like you wasted your time when you see dust gathering on all the
> equipment
> that you spent your time researching before you went out and spent
> good money
> on.
>
> But you know what? It really didn't hurt production... and for the
> reasons I
> stated in the beginning. Even though we were set-up to do
> solderability
> testing at the time, it didn't get done except for maybe a 2-4 week
> stretch
> just after the incoming recieving inspection area was set-up, and for
> those
> two occasions I spoke of earlier.
>
> The reason that was given to me why it wasn't done was that there were
> hardly
> ever any rejects, and that there were other items that DID need close
> inspection (sheet metal, wiring harnesses, etc.) that drained all the
> manpower
> from incoming recieving.
>
>                                       So that's my two-cents for what
> it's
> worth...
>
>                                                        -Steve Gregory-
>
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