Daan,
While the DRS24 is a nice system, I think it may have some of the same
limitations as other hot-air machines of it's vintage. Airflow on these
machines tends to move small parts around. If you switch to a low flow
option, it's sometimes difficult to get enough heat, especially if you have
a small footprint board. We have both SRT 1100 and a DRS24 and find similar
limitations. It does also need nozzles. A couple of systems I've looked at
recently were impressive with their ability to handle small components.
Metcal has a couple of hot-air units that are designed to handle very small
BGAs, micro-BGAs, CSPs, etc. ERSA has an IR unit that we were very impressed
with. It handled boards from small PCMCIA size to large 8x12 boards that are
bonded to a .400" aluminum heatsink on both sides. It depends on visually
watching the BGA ball drop, so it has some limitations due to visibility,
but overall for a wide variety of work, it would be one I looked at.
Rick Thompson
Sr. SMT Process Engineer
SMTEK International, Inc.
+1 (805) 532-2800
[log in to unmask]
===== Original Message from [log in to unmask] (TechNet E-Mail Forum.) at
2/26/03 8:30 am
>Hi Technet,
>
>We're planning to replace our current BGA repair equipment by something
>that's more suitable for fine-pitch BGA's and microBGA's (ballpitches
>down to 0.5 mm).
>We can get a brandnew Airvac DRS24 (or Zevac, as it's called in Europe)
>for half the price, but then we need to decide about it very soon,
>without having the time to do a good evaluation.
>Time to seek some expert's advice.....
>
>A significant part of our production work is subcontracting, and new
>customer-relations often start with doing some BGA-repairs for them.
>It's always urgent (no time to order a nozzle), there's never a sample
>board to adjust the profile, and normally there's hardly any free area
>around the BGA. We see everything from fine-pitch BGA's to CBGA's, 40*40
>mm heatsinked-BGA's and BGA-sockets, on boardthicknesses up to 5 mm.
>From what I heard the Airvac is certainly one of the very best
>rework-machines on the market, but I'm not sure if it is the best choice
>(i.e. flexible enough) for our situation.
>
>Any recommendations ?
>
>Daan Terstegge
>Thales Communications
>Unclassified mail
>Personal Website: http://www.smtinfo.net
>
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