Ken,
Stephen's observations are correct especially concerning good fixturing and
the sex of the assembler! As much support around holes as possible must be
provided for, as well as support for the rest of the board. Having seen
many of our customers use compliant pin connectors, and provided many
fixtures we have a great deal of experience at this game. Correctly
designed top tooling is essential, (and expensive if standard AMP tooling
is used). Please contact me offline if you require further help or a
quotation for any tooling.
Chris Chapman
Datum Dynamics
-----Original Message-----
From: Stephen R. Gregory [SMTP:[log in to unmask]]
Sent: Tuesday, August 25, 1998 1:02 AM
To: [log in to unmask]
Subject: Re: [TN] OSP v/s press-fit connectors.
In a message dated 08/24/98 7:16:37 PM Pacific Daylight Time,
[log in to unmask]
writes:
> Will there be any problem if my board surface finish is OSP and has a
> press-fit connector?
>
> Re,
> Ken Patel
Hi Ken!
None that I'm aware of...but I guess it really depends where your board is
going to be living the rest of it's life...I suppose there isn't really any
more of a risk for problems than there is with a plated barrel. Although it
IS
pretty important that your finished holes are a good fit with the press fit
pins, cause you don't have that "fudge factor" of the plating anymore.
At a past employer, we built quite a few different assemblies for a major
networking company here (hint: they're by great america), that used quite a
few high density right angle press-fits because these boards plugged into
backplanes. After a faux pax or two,...or three,...okay then, four...we
got
pretty good at it...(learning curve...you know how it is). One thing
important, a good stable fixture, as well as a precisely drilled support
plate
accurately supporting the laminate close to the barrels will keep them from
getting pushed out of the board. I don't know how you're doing this,
manually
with an arbor press, or with some sort of automated press, we just used a
manual arbor press. Interestingly enough, we found out that we had less
barrel
damage when we had our ladies doing it rather than the guys...more delicate
touch I suppose?
-Steve Gregory-
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