What's this 'metalic coating on both sides'? Is that like a 'two-sided board'?
I expect that your 200�F is the primary side temperature just prior to entering the wave. If not, you need more juice [depending on your flux and all that]. [Some modern wave soldering machines have two conveyors. The first runs sloooow for preheating and the second runs fast for soldering. Hot, eh? I gotta gimme wanna demm]
The optimum contact (dwell) time in the wave should be 2 seconds. Contact band width is a function of conveyor speed. The formula goes like this: t= d/v, where t = Dwell time of PCB in solder wave d = Geometrical length of contact between PCB & solder wave v = Conveyor speed
For an example, 5 cm of contact band width at 150 cm/min conveyor speed will give you 2 seconds of contact time and 2 cm of contact band width at 60 cm/min conveyor speed also delivers 2 seconds dwell (contact) time. [From a Sandia Laboratories chart]
I wonder if you couldn�t bake your boards prior to waving them as a way to put more energy into them.
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