TECHNET Archives

March 1999

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:
Thu, 18 Mar 1999 19:40:05 EST
Content-Type:
text/plain
Parts/Attachments:
text/plain (61 lines)
In a message dated 3/18/99 3:54:47 PM Pacific Standard Time, [log in to unmask]
writes:

<< Hi folks,

 I am looking for inputs on a long-standing problem encountered in our shop:
Bottom-side
 parts (passives) falling off in the Wave...where the only remnants of the
part is a flattened glue
 dot of proper diameter and volume, and sometimes flux residue (from the
wave).

 I suspect there is some incompatibility between one of our pastes and the
glue. Our shop
 uses two types of paste and one type of glue. After some experimenting, I am
seeing a
 STRONG correlation that suggests one paste type is not suited to the glue.

 Short of listing the specific materials used and getting myself in trouble,
is there anyone who
 has encountered the problem I am talking about? What was the cause and how
did you
 resolve it?

 If you want more specifics, please call me at 509-921-4311.

 Thanks,

 Earl & Marc >>

Hi ya Earl (and Marc)!

    Hey pardner! Where were ya' for the expo? Was lookin' forward to seeing if
you're uglier than me (GRIN) But from the sounds of things, looks like you're
kinda' up to your keester in alligators...probably couldn't afford the time
away huh?

   Anyways, are the parts that are falling off all the same part? Or are they
all different ones? If they're all the same, the time that something like that
happened to me was because of the mold release compound they used when making
the tape for the components, got all over the caps we were using and the glue
didn't wanna stick to em'... ...got components from a different vendor and
everything was okie-dokie after that. But knowing murphy, it ain't gonna be
that simple for you...but just maybe it might.

C-ya L8'er 'gator!

-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