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Tech Head - The Technology Section
The Work Bench and Soldering Station
Tin Whiskers
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<blockquote data-quote="Llew" data-source="post: 504626" data-attributes="member: 175007"><p>LOL, I worked at Pye TV for a few years, and my first job was flow-soldering PCB boards by dipping them in a bath brim-full of solder, which we replenished frequently by melting in sticks of 60/40.</p><p></p><p>Boards were first covered with flux (using a decorator's paint brush).</p><p></p><p>No temperature control of the solder that I remember - we sometimes over-baked the board!</p><p></p><p>Failure rate was about 10%. Main problems -</p><p></p><p>Aforementioned over-baking, destroying the print</p><p></p><p>Solder too cool - large clumps of solder all over the print</p><p></p><p>Inadvertently dipping the board too far in - solder all over the component side (!)</p><p></p><p>Plenty of noxious fumes about, no health'n'safety issues back then. I seem to have survived the experience, despite doing it eight hours a day for a few weeks <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /></p><p></p><p>Later a revolving arm driven by a motor was produced, with the boards clamped to holders. This was a little more precise regarding getting the boards to skim the bath correctly; still some failures due to incorrect temperature. It had a fume extractor of sorts, don't think there was a fan though.</p><p></p><p></p><p>Llew</p></blockquote><p></p>
[QUOTE="Llew, post: 504626, member: 175007"] LOL, I worked at Pye TV for a few years, and my first job was flow-soldering PCB boards by dipping them in a bath brim-full of solder, which we replenished frequently by melting in sticks of 60/40. Boards were first covered with flux (using a decorator's paint brush). No temperature control of the solder that I remember - we sometimes over-baked the board! Failure rate was about 10%. Main problems - Aforementioned over-baking, destroying the print Solder too cool - large clumps of solder all over the print Inadvertently dipping the board too far in - solder all over the component side (!) Plenty of noxious fumes about, no health'n'safety issues back then. I seem to have survived the experience, despite doing it eight hours a day for a few weeks :eek: Later a revolving arm driven by a motor was produced, with the boards clamped to holders. This was a little more precise regarding getting the boards to skim the bath correctly; still some failures due to incorrect temperature. It had a fume extractor of sorts, don't think there was a fan though. Llew [/QUOTE]
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