Chris,
To clarify, I'm interested in the width of the web itself, which would be
created by the fabricator per instructions given by the assembler.
Thanks,
Gary
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Chris
Ball
Sent: Wednesday, January 26, 2005 11:21 AM
To: [log in to unmask]
Subject: Re: [DC] Web routing widths
Hi Gary-
Just to be clear (I'm kinda slow sometimes), are you interested in:
the router bit dia. the boardshop uses to define the board outline (except
for the attachment points),
the router bit dia. the assembly house uses when singulating your PCB from
the array,
the width of the web itself,
or all of the above?
I ask because I've seen all kinds of combinations of everything and want to
understand the responses you get.
For what it's worth, I now use a 2MM slot width, with 3 or 5MM web
depending on how far apart the webs are. Seems to be sort of a european
std....
Best Regards,
-Chris
Gary Koven
<[log in to unmask]> To:
[log in to unmask]
Sent by: DesignerCouncil cc:
<[log in to unmask]> Subject: [DC]
Web routing widths
01/26/2005 11:00 AM
Please respond to
"(Designers Council
Forum)"; Please respond to
Gary Koven
Forgive me if this seems arcane, but we've become interested in the
different web routing widths that our assemblers are telling their
fabricators to use to panelize/depanelize our boards. We've seen 0.125
inch, 0.093 inch, 0.062 inch, and 0.050 inch wide webs thus far.
1. Is there one IPC standard, or a combination of IPC standards, which
specifies preferred web routing widths?
2. How does an assembler determine a "sweet spot" for each preferred web
routing width whereby the individual boards will depanelize most easily?
3. Which preferred web routing width yields the lowest cost route?
Best Regards,
======================
Gary M. Koven, C.I.D.
Engineering Services Manager
Dynazign, Inc.
806 Tyvola Road, Suite 100
Charlotte, NC 28217
P: 704.405.1234 x210
F: 704.405.1402
http://www.dynazign.com/
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