we have been using Zestron's Vigon SC200 in a stencil cleaner at room
temperature..
Make sure you do a gauge RR study on your measurement tool. We used a Brix
refractometer recommended by our rep, and could not distinguish between
samples with concentrations between 20 - 35%. Only below this level were
the concentration results different enough. We had to dilute the sample
before testing to get an accurate concentration reading.
Roger Mack P.Eng.
Manufacturing Specialist
Parker Hannifin Corporation
Electronic Controls Division
1305 Clarence Avenue
Winnipeg, MB R3T 1T4 Canada
direct 204 453 3339 x373
www.vansco.ca
www.parker.com
R Sedlak <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
2009-08-18 09:35
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
R Sedlak <[log in to unmask]>
To
[log in to unmask]
cc
Subject
Re: [TN] Cleaning a little too much...
How do you check concentration to know how much Vigon to add?
Rudy Sedlak
RD Chemical Company
--- On Tue, 8/18/09, Skillborg Fredrik <[log in to unmask]>
wrote:
From: Skillborg Fredrik <[log in to unmask]>
Subject: [TN] Cleaning a little too much...
To: [log in to unmask]
Date: Tuesday, August 18, 2009, 1:22 AM
Hello,
We have a problem when cleaning populated boards before conformal
coating.
Problem: The color on our labels on the boards "dewet" during the
cleaning step, but only when we have set a new bath. Then it is getting
better and better and after a week or so the problem is gone.
During production we are constantly adding cleaning agent to keep
concentration steady.
Cleaning agent: Vigon US (Zestron), 26%
Settings: 50 deg C, 12 minutes, agitation and immersed spraying.
Has anyone else seen this problem and figure out how to overcome it
(apart from laser mark the boards instead of using labels)?
We have tried to increase the heat in the printers, changed batch of
labels, changed brand of labels, changed ribbon in the printer but the
problem persists.
We have sent labels to Zestron and to the labelmanufacturer and they
have made their own tests, repeated the problem but have no solution. We
can go down to 15% concentration to avoid the problem but then the
boards won't be clean...
To add some more trickiness to the question the problem; it appeared
last summer but we have used the same settings, cleaning agent, labels
and printers for much longer than that. Usually we change the bath every
3 -4 months but we have postpone the current change when searching for
some light in the tunnel.
All inputs are highly appreciated!
Best regards,
// Fredrik
Important:
This email transmission is intended only for the person or entity to
which it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of,
or taking of any action in reliance upon, this information by persons
or entities other than the intended recipient is prohibited. If you
received this in error, please contact the sender and delete the
material from any computer.
---------------------------------------------------
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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
PLEASE NOTE: The preceding information may be confidential or
privileged. It only should be used or disseminated for the purpose
of conducting business with Parker. If you are not an intended
recipient, please notify the sender by replying to this message and
then delete the information from your system. Thank you for your
cooperation.
---------------------------------------------------
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
-----------------------------------------------------
|
