Article View: sci.electronics.design
Article #718Re: What can I do to keep this board from warping?
From: Archimedes' Lever
Date: Mon, 28 Sep 2009 20:24
Date: Mon, 28 Sep 2009 20:24
26 lines
2671 bytes
2671 bytes
On Mon, 28 Sep 2009 06:21:13 -0700, Smitty Two <prestwhich@earthlink.net> wrote: >In article <r7l0c5l9457i2ug2u6143cp6pllirtrauu@4ax.com>, > Archimedes' Lever <OneBigLever@InfiniteSeries.Org> wrote: > >> >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. >> >> This one is off the mark. Perhaps you meant "at MORE than 800�F" >> That would certainly be an upper max for me, and it is quite easy to >> solder at much lower temperatures. Well over a 100 degree differential, >> and that is significant. > >Pardon my ambiguity. What I meant to say was "anything other than 800F." >That's the upper limit on most fixed-temperature tips, or adjustable >irons. Yes, and despite most folks cranking the damned things up that high, basic soldering operations (pre-RoHS) were NEVER meant to be performed at that high a temperature. Even on big 0.092" stock with lots of Copper. In that case, one should pre-heat the whole assembly a couple hundred �F, which will insure that all the solder joints wet well and flow through properly.
Technical Details
Message-ID:
<kk62c51rq1rhdq9he33du6t99nbjp1pqga@4ax.com>Path:
arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post01.iad.highwinds-media.com!newsfe09.iad.POSTED!7564ea0f!not-for-mailReferences:
<8ca1d668-3369-4f05-ac3c-a47ad550740b@d34g2000vbm.googlegroups.com> <j92rb514enqfujntb1ghuo3h1lncv2etpb@4ax.com> <80f4ecae-bd8f-4f69-a9ab-44e2a1cd8820@j19g2000vbp.googlegroups.com> <ob7vb5hbtk1jft1ju767hq0k8ofnjo23dc@4ax.com> <prestwhich-E9EDCC.11593227092009@newsfarm.iad.highwinds-media.com> <r7l0c5l9457i2ug2u6143cp6pllirtrauu@4ax.com> <prestwhich-D4302D.06211328092009@newsfarm.iad.highwinds-media.com>Show Full Headers
Complete Article Headers
X-Google-Thread: a5a6238865,63be20ac21afdf53 X-Google-Attributes: gida5a6238865,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII Path: arc1-ca.pugleaf.net!g2news2.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post01.iad.highwinds-media.com!newsfe09.iad.POSTED!7564ea0f!not-for-mail From: Archimedes' Lever <OneBigLever@InfiniteSeries.Org> Newsgroups: sci.electronics.design,sci.electronics.repair,aus.electronics Subject: Re: What can I do to keep this board from warping? Organization: Archimedes'Palimpsest Reply-To: My Assistant: Zhang Heng Message-ID: <kk62c51rq1rhdq9he33du6t99nbjp1pqga@4ax.com> References: <8ca1d668-3369-4f05-ac3c-a47ad550740b@d34g2000vbm.googlegroups.com> <j92rb514enqfujntb1ghuo3h1lncv2etpb@4ax.com> <80f4ecae-bd8f-4f69-a9ab-44e2a1cd8820@j19g2000vbp.googlegroups.com> <ob7vb5hbtk1jft1ju767hq0k8ofnjo23dc@4ax.com> <prestwhich-E9EDCC.11593227092009@newsfarm.iad.highwinds-media.com> <r7l0c5l9457i2ug2u6143cp6pllirtrauu@4ax.com> <prestwhich-D4302D.06211328092009@newsfarm.iad.highwinds-media.com> X-Newsreader: Forte Agent 4.2/32.1118 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Lines: 26 NNTP-Posting-Host: 72.197.137.217 X-Complaints-To: newsmaster@cox.net X-Trace: newsfe09.iad 1254169454 72.197.137.217 (Mon, 28 Sep 2009 20:24:14 UTC) NNTP-Posting-Date: Mon, 28 Sep 2009 20:24:14 UTC Date: Mon, 28 Sep 2009 13:24:12 -0700