i get paste stencils for about $320 USD, so that seems in line w/ what
you are all saying
they usually take about 1 day turn since i am near silicon valley
actually my assembler gets them but i pay for them
the trouble is they sure prove to be a disincentive to what i feel to be
the worthy goal of 'continuous improvement'
if we build 100 pcs of board before a rev spin we are doing well so i
guess $3.20 a board for a stencil is not too bad but when we do 5
different protos and then spin all the revs to the inevitable rev 'B' it
sure adds up to a lot of trashed stencils and money
seems like there ought to be a better way
the only thing i have come up with is putting 2-4 different boards on a
15" x 15" with about 1" between, this can save a bunch, especially on protos
camtastic (2000!) makes it pretty easy
darren, not sure what you mean it 'takes a while to burn that w/ manual
paste placement'
are you saying you can do a lot of bds for $320 ?
yes, maybe 2- 5 bds depending on the features
what do you use ?
a manual time/pressure dot dispenser like EFD?
i have one of those and it is gathering dust now (actually we sometimes
use it for gluing things but not bd parts)
for protos i gave up on that and just hand solder with the good old
metcal and a big jug of flux with a teensy needle tip on the end, it
does a better job i think - no solder balls
either way both methods take a LONG time to build one or three boards
i realize that w/ QFNs and BGAs a stencil is a must so i use those only
if they are a must do
in fact after switching over to 0603s i am now switching back to 0805s
due to low volumes and the greater ease of troubleshooting and mods
back to SIPAD...
it appears that somewhere along the process, unless i have been
misinformed, they make a stencil and do what the assembler would do just
at a different point in time
still, it does allow storage and therefore time shifting of that process
ds
_______________________________________________________________________
Integrated Controls, Inc. Tel: 415-647-0480 EXT 107
2851 21st Street Fax: 415-647-3003
San Francisco, CA 94110 www.integratedcontrolsinc.com
Darren wrote:
Hi Brad,
Depends if its laser cut or etched, about $350 - $500AUD
$270 - $385 odd USD. 3-5 days turn size about the same,
some places can't make them as large. Takes a while to
burn that with manual paste placement, the lead time can
be a problem also, most my clients don't have it.
Regards,
Darren Moore
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Brad Velander
Sent: Wednesday, 7 September 2005 12:17
To: [EMAIL PROTECTED]; Open Topic Forum
Subject: RE: [OT] Re: [PEDA] OT- SIPAD PCB's
Darren, Dennis,
Roughly what is it that you guys typically pay for a
screen? We get ours (typ. 15x15 in. or 20x20 in.
stainless/cast frame) on a 3 day turn for $380 CDN (approx.
$320US). However that may be priced for at least moderate
value sales. We probably purchase about 30 - 50 screens per year.
We buy screens for any prototype that's complex (SMT
comp count > 200, lots of fine pitch) or pretty much anything
that has a good chance of making it to full production.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
#14 - 1925 Kirschner Road,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
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