Hi Bob - unfortunately there are a fair number of components today where
the lead toe has a non-plated or sheared surface making those areas
"non-wettable by design" so an inspection of the toe would not provide a
visual indication of the reflow process.
Dave Hillman
Rockwell Collins
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Robert Kondner <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
10/30/2009 10:08 AM
Please respond to
[log in to unmask]
To
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cc
Subject
Re: [TN] May the force be in the heel
Hi,
The one thing the TOE provides is an indication of reflow "Quality". The
HEEL is more important but the TOE gives a visual indication of the reflow
process.
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier
Sent: Friday, October 30, 2009 10:49 AM
To: [log in to unmask]
Subject: Re: [TN] May the force be in the heel
Ioan?have you been unreliable again ;-(,
Yes, for a gullwing lead, the most important part of the SJ is the heel
fillet. Depending a the length of the lead foot, the toe fillet is not
important at all (for a long compliant foot) or quite important (for a
short
stubby stiff foot). But in either case, the heel fillet is most important.
Werner
-----Original Message-----
From: Ioan Tempea <[log in to unmask]>
To: [log in to unmask]
Sent: Fri, Oct 30, 2009 10:40 am
Subject: [TN] May the force be in the heel
Dear Technos,
I keep hearing : "the force of the gull wing pin joint is in the heel".
What
is
the truth of this affirmation?
Werner, I must confess not having practiced much reliability issues after
your
class, so I must have forgotten stuff, but I don't remember you praising
the
heel. I'm in some polemics here and wouldn't want to falsely blast the
other
side.
Thanks,
Ioan Tempea, ing.
Ingénieur Principal Fabrication / Sr. Manufacturing Engineer
30 ans déjà! - 30 years already!
950 rue Bergar, Laval, Québec, H7L 5A1
t : 450-967-7100 ext : 244
Mtl : 514-990-5762
f : 450-967-7444
[log in to unmask] <mailto:[log in to unmask]>
www.digico.cc <http://www.digico.cc/>
P N'imprimer que si nécessaire - Print only if you must
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