I was hoping someone else would make this suggestion, but they haven't so I
will risk it.
Alternatively you could use a solderpaste designed for pin testing. When
properly formulated these do not clog pins or machinery so none of these
questions, additional processes and uncertainties arise.
Kind Regards
Mike Fenner
Applications Engineer, European Operations
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Leadfree: www.Pb-Free.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of
[log in to unmask]
Sent: Thursday, March 07, 2002 11:29 PM
To: [log in to unmask]
Subject: Re: [TN] VERY IMPORTANT QUESTION CONCERNING CLEANING TEST PINS
Hi Earl! Doug went home for the day but I sure he'll chime in tomorrow
(right after his first Mtn. Dew)! We have looked at this issue at Collins
as we slowly move into using reduced clean/no-clean solder practices. One
method which does work is to use a brush and an appropriate solvent to
"scrub" the test points of your test fixture. The type of flux residue you
are dealing with will determine the type of solvent and the "robustness" of
your test pin will determine the stiffness of the brush bristles/amount of
pressure you can use without damaging the test pins. This methodology would
not be appropriate for a high volume operation but if you are in a high
mix/low volume assembly mode it can be setup as a preventative maintenance
operation. Not rocket science but effective. Good Luck.
Dave Hillman
Rockwell Collins
[log in to unmask]
Earl Moon <[log in to unmask]>@ipc.org> on 03/07/2002 03:18:53 PM
Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
to Earl Moon <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
To: [log in to unmask]
cc:
Subject: [TN] VERY IMPORTANT QUESTION CONCERNING CLEANING TEST PINS
Ok you folks, especially Doug and Brian,
You let this gentleman down and me as well. So much for my appeal but the
question is:
Techneters,
I would like to know if some of you have a suggested procedure for cleaning
of pins for In Circuit Testing, and if is possible to use a solvent, and
what kind of.
Is it possible that flux residues can go into spring machinery? If that
true, how can I clean them of flux residues and how often I must do it?
Regards,
Mario,
I answered knowing you all would come through:
I'm definitely not a cleaning or cleanliness expert. Doug Pauls and Big
Brian Ellis, who contribute greatly to the forum is/are.
I only know flux chemistries are varied. What it takes to clean or
neutralize one, is not right for another.
This is a big issue faced everyday by so many throughout industry, I'm
surprised more people aren't asking your vital qestion.
I would post again or contact someone more qualified as Doug Pauls
([log in to unmask]) and/or Brian Ellis ([log in to unmask]).
I too would be very interested in the chemistry, though it must be
"compatible" and capable of cleaning the indicated flux/chemistry in some
sort of optimized process whether batch or other.
Best regards,
Earl
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