Is the the whole connector in the wave at the same time? You may have the
connector in the wave too deep or ruuning too fast not allowing  all the
excess solder to peel (pull) away.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Steve Gregory
Sent: Friday, July 23, 2004 7:16 AM
To: [log in to unmask]
Subject: Re: [TN] Solder Bridging on a Thru-hole connector


Hi Rich!

Finally got your picture, and it's posted. Go to:

http://www.stevezeva.homestead.com/files/Solder_Bridging.jpg

This picture is pretty blurry, but it's clear enough to see that you
shouldn't be having bridging problems with this connector. It's a
standard-pitch
dual-row connector, and there shouldn't be bridging problems with it.

Can you share with us the parameters for the wave that you're using?

Belt speed?
Pre-heat temperature?
Pot Temperature?
Flux Type?

I see from your web page that you have an Electrovert Econopak Plus 400 wave
machine, with a Sonotech spray fluxer. This machine should be capable of
waving that connector without bridges.

In the meantime, here's a link that has a pretty good troubleshooting guide
for wave soldering defects. It's based on IPC-S-816. It's not the end-all
for
troubleshooting problems, but a good starting point.

http://www.ecd.com/retrieveFile.asp?file=WS_Expert_Guide.pdf

-Steve Gregory-


> Hello everyone,
>
> I am currently encountering a wave solder issue that I would like to ask
> your opinion about.  I have a dual row connector (Molex part #
> 70246-1621) that accumulates soldering bridging in a group of three.  I
> sent Steve an e-mail to see if he could post the picture on his website
> so hopefully he can but until then I'll try and give you a generic idea
> of how it is bridging.  (The "arrow's" below represent the bridging
> between the leads)  The wave operator has tried different speeds and
> board directions but continues to struggle with this particular
> connector.
>
> If anyone has any input I would appreciate it.
>
> TIA,
>
> Rich
>


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