Steve - Two suggestions. (1) Can you get a hold of the PCB fabricator and
have them gut a deeper V-Groove? I don't know what your specs say for the
material remaining (web thickness), but you can probably go a lot thinner.
(2) Maybe you can try cutting them with a water jet? A laser is also a
possibility, but it would cost a lot more than $5K. Just some alternatives .
. .
Ed Valentine
Electronics Manufacturing Solutions
8612 Mourning Dove Road, Raleigh, NC 27615
Phone: (919) 270-5145, Fax: (919) 847-9971
Email: [log in to unmask]
Website: http://www.ems-consulting.com
----- Original Message -----
From: "Stephen R. Gregory" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 28, 2000 9:54 PM
Subject: [TN] Depanelizing boards within a "RCH"...
> Hi all!
>
> I got another "opportunity"...we may be getting some boards in here that
are
> in a 2-up panel, that are polyimide, that have to be depanelized. "So
whutz
> yer problem Steve?"
>
> Problem is that there are traces that run .015" from the edge of the
> board...nifty huh?
> The boards are scored within that dimension, but it was learned that
snapping
> them out isn't a solution, or is using a machine called a "Maestro" (I
can't
> remember the company that makes them), or one from "Radoll Designs", that
> follow along the score lines to separate the boards. They say that they've
> tried these tools and that this results in innerlayer separations because
of
> the brittle-ness of the polyimide material...I can understand that.
>
> So they say it needs to be cut with a diamond saw, again, I understand
> that...polyimide laminate is some tough stuff to cut. So I went on a
search
> for diamond saws...got a bunch of hits that have saws to cut ceramic tile,
> and lapidary tools to cut jewelry stones and such, but nothing that I've
> found that convinces me that I'll be able to set this board up in and be
able
> to be repeatable within .015"...it seems now I'll have to try and eyeball
> everything with something like a rip fence. The systems that I've seen
also
> all have oil or water cooling systems for the blades that will douch the
> boards with liquid from the saws that I don't think is a good idea to
do...
>
> I know, I know...this is asking a lot...such is my life...but is there
> anything out there that any of you know of that can do this? For less than
> $5K?
>
> Customer says that they'll be getting away from panelized designs sometime
> soon, but not soon enough to not have to build panelized boards for a
> while...guess this stuff is why I have a job...
>
> If I figure out how to do this, I'll let ya'll know...if I'm still
sane...and
> can type on my keyboard...
>
> -Steve Gregory-
>
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