TECHNET Archives

November 1998

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Stephen R. Gregory" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 16 Nov 1998 18:51:17 EST
Content-Type:
text/plain
Parts/Attachments:
text/plain (39 lines)
Hi Ya'll!

     I've been wave soldering some boards today that we've been building for a
customer over the last 2-months. They're a little 2" X 2" PTH board in a 30-up
panel, and haven't given me a lick of trouble till today...been waving fine
for the past two months. Other than wanting to bow big time while warming up
before hitting the wave, there really isn't much to em'.

      They came out of the wave today with random barrels missing solder...and
when you look at the barrels that's missing solder, it's like the solder just
tinned the barrel and lead, and then said "hasta la vista baby, I'm outta
here.." and just dropped outta the holes?!?! It's random too...not
concentrated in any one area. What's got me perplexed is why did it appear
that it wet to the barrel and lead by the way it tinned them, but didn't stay
up in the barrel? There's no vibration anywhere, and the conveyer runs as
smooth as a babies butt...and I don't use a hot air knife.

       Nothing has changed with my settings that I've used over the past
2-months and have been working great up until today. I'm water soluble, foam
stone fluxer, Soltec Prisma with convection pre-heat, and Kester Flux. Cleaned
the pot and flux tank this weekend, so I was starting with a nice dross-less
pot and fresh flux...so what gives? Anybody seen this before? Any ideas?

Thanks in Advance!

-Steve Gregory-

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################


ATOM RSS1 RSS2