Technetters,

This is reposting of my earlier call for help, with some additional info
asked by Frank K.

We have an Electrovert Wave soldering machine, that does not use a hot air
knife, we wave solder alot of PCB's with good results.  We have one
particular PCB that exhibits solder bridging on some through-hole
transistors.  Can anyone offer some suggestions, it would helpful!

>>Hey Tom,

>>Let's see if I'm first with more questions.
>>I think more data is needed prior to answering your questions.
>>What is your pot temp?
>>What is travel speed?
>>What is the profile for temp rise?
>>What is pad stack and distance between pads on bridged joints?
>>Is this a new design or has something else changed in your process?

1. What is you pot temp?
    490 F

2. What is your travel speed?
    4.0 in/min

3. What is profile for temp rise?
    200-210 f until wave with Kester 951 no-clean.

4. What is pad stack and distance between pads on bridged joints?
    Less than 1/2mm between pads on staggered layout, with 1mm lead
protrusion

5. Is this a new design or has something else changed in process?
    Yes, this is new design PCB is 7in x 6 in,  overhang of components
dictates that PCB can not be rotated 90 and waved.



Thanks!  Thanks Frank!

Tom Braswell

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