Received: |
by ipchq.com (Smail3.1.28.1 #2)
id m0sr8c9-0000GZC; Fri, 8 Sep 95 13:57 CDT |
Content-Type: |
text/plain; charset="us-ascii" |
Old-Return-Path: |
<miso!iphase.com!jcupples> |
Date: |
Fri, 8 Sep 1995 13:55:31 -0500 |
Precedence: |
list |
Resent-From: |
|
Resent-Sender: |
|
X-Status: |
|
Status: |
O |
X-Mailing-List: |
|
X-Sender: |
|
TO: |
|
Return-Path: |
|
Resent-Message-ID: |
<"V-G-f1.0.2n8.J89Km"@ipc> |
Subject: |
|
From: |
|
Mime-Version: |
1.0 |
X-Loop: |
|
From [log in to unmask] Sat Apr 27 14: |
44:47 1996 |
Message-Id: |
<ac763f4b010210047a82@[157.175.110.24]> |
Parts/Attachments: |
|
|
Gordy, you said:
>Also keep in mind that some of the gold is dragged out with the dross that is
>removed on a daily basis when using a "dry" wave solder pot. I have experience
>with oil covered wave solder pots and they do indeed exhibit a build up of
>gold, primariy because you are not forming dross and hence not removing some
>contaminants. We typically dumped an oil covered pot every 3 months either due
>to gold or copper contamination levels. When we changed wave solder machines
>to a "dry" wave we found we could go years without dumping the solder pot even
>though what we soldered had not changed.
>
>Gordy Seppanen, Process Engineer
>Military Avionics
>Honeywell Inc.
Yes, I'm sure you are right. I used to have an old Dee Electric machine
with an oil blanket, and an old Hollis oil intermix (yeccch). Those pots
built up copper a lot faster. The dross formation definitely carries out
some metals in the form of oxides. Good point. Whether gold specifically
would stay in solution with the tin, I dunno.
However, these days I'm putting fewer bars in the Electrovert every month,
and I'm using more paste - how about you? Seems like all that experience of
wavesolder maintenance and operation is like knowing what to do with a
dwell tach and timing light...
cheers,
Jerry Cupples
|
|
|