If the boards needs to be marked more than once, does the ink
need to come off? If it does, what are you going to use to remove it,
chisel? Sorry, it is Friday.
Make some Brady type of labels and attach them to the boards.
The ink will not come off. Once you completed the assembly peel the
labels off. The labels come in many sizes, some are very small. If you
do not have a machine, you can order them from companies that do.
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Barmuta, Mike
Sent: Thursday, April 27, 2006 5:07 PM
To: [log in to unmask]
Subject: Re: [TN] Epoxy Marking Pens
Hi Chris: If you want a one component epoxy with a "fast cure" you are
going to have to bake it. There is no such thing as a one component room
temperature fast cure epoxy. By definition it couldn't exist. Soon as
you filled the dispense applicator up, it would start curing.
If you want to go down the epoxy trail here are your options:
* Use a two part epoxy fast (short pot life) room temperature cure
system .
* There are one component refrigerated epoxies that will cure at
room temperatures but they may not be as fast as you want.
* Use a one part epoxy that has a fast bake cycle
If you can't bake, don't want to mess around with two components or
refrigeration, my choice would be:
* A one part U/V curable system. They cure virtually
instantaneously with a U/V light source. A little pricey, but if it does
what you want it to that's the cost of business. There are epoxies,
acrylics, silicones and cyanoacrylates. Check with Loctite and Dymax for
products.
However taking it one step further I would investigate one component U/V
curable marking inks or soldermask and forget about the epoxy.
Regards
Michael Barmuta
Staff Engineer
Fluke Corp.
Everett WA
425-446-6076
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Schaefer, Chris
Sent: Thursday, April 27, 2006 1:08 PM
To: [log in to unmask]
Subject: [TN] Epoxy Marking Pens
Hello all,
Can anyone tell me where I can get single part epoxy pens? I am looking
for a way to mark FR4 (on the dge) CCA's to indicate operations have
been performed, but everything I have tried washes off in the inline
cleaner. We are using a Kyzen A4520 at 15% concentration 125F and
everything we try comes off. So our last resort is to go with single
part fast cure epoxy and hopefully be able to get it in different colors
and in a form that allows us to put it on quickly and easily.
Please help obi whan kenobie your my only hope. Its almost Friday -
getting a little excited.
Thanks in advance.
Chris Schaefer
Suntron Corporation
Process Engineer
540 N. Rogers Road
Olathe, Kansas 66062
913.393.5878
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