[log in to unmask] said:
>I am helping a client who is looking to set up an SMT
>line. Can anyone recommend a supplier of new or
>refurbished SMT equipment, entry to mid level. We are
>looking for pick-and-place, stencil printer and reflow
>oven. I know where to find vendors on the web. I am
>looking for satisfied users to give me some guidance.
IMHO, the Juki (formerly Zevatech) 700 series machines are very good for
the price. They have a good mixture of speed, flexibility, and
sophistication. A single FM-740 or FM-760 machine with a matrix tray loader
would be a great entry level machine, but still capable of BGA's and a big
variety of components with front and back feederbanks. Talk to them about
getting one coming off a lease for someone upgrading.
Whatever you get, take a close look at the feeders, they make or break you,
and you will need a good assortment. The Juki Automation mechanical feeders
are nice, simple, reliable units - reasonably priced compared to most
competition. Juki has long been the equipment manufacturer, but were sold
in Europe and the US as Zevatech until recently. The Juki machines have
been extremely successful in the far eastern market.
I think the Juki gantry drive is fast and accurate. I like the magnetic
encoder scheme they use. Their laser centering works very well on discrete
parts, and it centers on the fly.
For stencil printing, either an MPM SP-200 or an HTI "clamshell" semi-auto
(pin-aligned) printer would be good. You don't need vision alignment for
entry/startup. An automatic in-line printer will start at about $75K and go
WAY up from there. The semi-auto machines can easily keep up with your line
speed at cycle times below one minute, and for a single P&P machine, you
will probably have cycle times of several minutes. It continues to baffle
me why people tend to spend so much money on high-end printers. The only
possible explanation is when a line is dedicated to very high continuous
output with a short cycle time, as I see it.
In furnaces, our BTU VIP-70 convection (air) furnaces have been reliable
and solid performers. My opinion here is that five vertical zones give you
enough profile flexibility, and that nitrogen is an extravagence.
With a $250K budget, you could have these 3 pcs new or nearly new. You can
build even sophisticated boards at low volumes with such a line; add a
second FS-730 or FS-750 machine to the line, you can go to 30-50 units per
hour or more.
Check out all the above at APEX, and ask tons of questions. Make them demo
the software for you.
And no, I would never admit publically that I "yahoo". My recommendation is
to use a much less boorish expletive, even in cases of intense, unexpected
ecstasy. I tend to go non-verbal.
regards,
Jerry Cupples
Interphase Corporation
Dallas, TX USA
http://www.iphase.com
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