TECHNET Archives

September 2010

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:
Douglas Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 7 Sep 2010 08:13:30 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (144 lines)
Ohhhh, I beg to differ.  Water soluble fluxes are more active and will 
probably do OK for soldering, but they also represent a danger if you do 
not totally remove them or if some of it flows into places and does not 
get rinsed out.  What really makes me nervous about your approach is your 
choice of equipment and cleaners. Tap water sucks as a cleaner and hot tap 
water only slightly better.  You might be able to remove the visible 
residues, but will still have invisible residues that will cause problems. 
 In some cases, you are putting on more contaminants with the tap water 
than you are removing.

We use low residue fluxes here on class three product and have a number of 
cases where the the residues are left in place.  It is simply a matter of 
finding a flux and cleaning combination that works well together, and 
limiting the amount of additional flux you add.  A skilled operator can do 
soldering with no more flux than is in the core of the wire. You may need 
a slightly larger core.

Ken, I would suggest this short list to you.  Use either Kester 245 low 
residue flux (P3 core) or Alpha Telecore Plus (also P3 core).  Both are 
standards here and work well for soldering.  For topical cleaning 
solutions, try Kyzen's Cybersolv 141b or Chemtronics Flux-Off Heavy Duty. 
Both these cleaning agents work well with the fluxes I named. 

Doug Pauls
Rockwell Collins



Robert Kondner <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
09/06/2010 01:27 PM
Please respond to
[log in to unmask]


To
[log in to unmask]
cc

Subject
Re: [TN] Hand Soldering






Ken,

 In my mind there is absolutely no question, hand assemble using Water
Soluble flux. A good spray under hot water cleans well. 

 During final assembly or rework I might use a no clean at spots. The only
problem is the no clean is VERY DIFFICULT to remove so don't try. It
detracts from board appearance.

 It the spot being reworked is a sensitive analog circuit they rework 
using
Water Soluble. For anything close to fine pitch SMT you should be applying
liberal quantities of Water Soluble flux, only way to rework.

 You can get a little "Water Pick" real cheap. Load it with hot water and
you can you can really get down into the nooks and crannies. 

Bob Kondner

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kenneth Wood
Sent: Monday, September 06, 2010 8:30 AM
To: [log in to unmask]
Subject: [TN] Hand Soldering

Hi all.
What is the best setup for hand soldering as far as solder / cleaner?
Rosin core? Water soluble? No-Clean?
What cleaner too?

I've been using rosin core with various cleaners but I have a hard time 
with
the white residue the cleaners leave.

Thanks
Ken





______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to 
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to 
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 
for additional information, or contact Keach Sasamori at [log in to unmask] or 
847-615-7100 ext.2815
-----------------------------------------------------



______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2