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Article #715

Re: What can I do to keep this board from warping?

#715
From: Smitty Two
Date: Sun, 27 Sep 2009 18:59
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In article <ob7vb5hbtk1jft1ju767hq0k8ofnjo23dc@4ax.com>,
 Jeff Liebermann <jeffl@cruzio.com> wrote:

> Yet, all the boards in my collection are quite straight.  That
> demonstrates that it can be done.  I'm not sure what you're doing
> that's wrong, but I agree with others that suggest you're using far to
> much solder and heat.  Smaller parts, less solder, and less heat will
> help.
> 
> Incidentally, when I say less heat, I don't mean less temperature.  I
> use the hottest iron tip I can get away with, and work fast.  That
> minimizes the energy transfered to the solder joint and therefore
> reduces the heat affected zone.

I think one problem is that this is a home made board. The holes are 
likely too large for the components (because most people don't have very 
small drills on hand or even the drill chuck to hold them) and obviously 
they aren't plated through. That can make it necessary to glob on the 
solder.

As far as temperature, I agree with you. I've never found a need to 
solder anything at less than 800F. Smaller parts just require shorter 
dwell time.

I have no idea why the OP is using such thin stock, though. It looks 
like he'd have room for something as robust as .050".
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From: Smitty Two <prestwhich@earthlink.net>
Newsgroups: sci.electronics.design,sci.electronics.repair,aus.electronics
Subject: Re: What can I do to keep this board from warping?
References: <8ca1d668-3369-4f05-ac3c-a47ad550740b@d34g2000vbm.googlegroups.com> <j92rb514enqfujntb1ghuo3h1lncv2etpb@4ax.com> <80f4ecae-bd8f-4f69-a9ab-44e2a1cd8820@j19g2000vbp.googlegroups.com> <ob7vb5hbtk1jft1ju767hq0k8ofnjo23dc@4ax.com>
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