Mark: For our small depanelized PCA's we place them in an open top wire mesh
basket. Then an expanded mesh(diamond pattern), notice that I did say wire
mesh, piece of sheet stock cut slightly under size of the basket dimensions
is placed over the top of the boards. The expanded mesh openings are @
25-50% smaller than the smallest PCA. This allows for ample water flow to
the parts for washing and rinsing but is heavy enough to prevent them from
jumping around in the spray rinse and drying sections.
If you are going for cheap you can use aluminum as long as it is compatible
with your wash chemistry if not go with SS. You may want to try a couple of
different material thickness' to make sure there is enough weight for your
application.  Either way it is fairly inexpensive and should last a long
time. It is simple and does not require a lot of hardware and fooling
around.


Regards

Michael Barmuta

Staff Engineer

Fluke Corp.

Everett WA

425-446-6076

-----Original Message-----
From: Mark Charlton [mailto:[log in to unmask]]
Sent: Wednesday, December 05, 2001 8:46 AM
To: [log in to unmask]
Subject: Re: [TN] Small PCBs in wash


Sorry, I left out one important detail.  They are in baskets, the thinnest
(so I'm told) available.  Perhaps some kind of mat or other mesh inside the
basket?  Has to be inexpensive.

Mark

----- Original Message -----
From: "Jason Gregory" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, December 05, 2001 11:48 AM
Subject: Re: Small PCBs in wash


Use baskets. I'll let Steve Z. or Moonman jump in since I can't remember who
makes 'em.


Jason Gregory
Software Specialist - NPI Group
SCI Systems/Plant 2
13000 S. Memorial Pkwy.
Huntsville, AL. 35803
(256) 882-4107 x3728
[log in to unmask]

>>> Mark Charlton <[log in to unmask]> 12/05/01 10:31AM >>>
We're experiencing some damage to some small PCB's (0.75"x1.75") that
occurs during their trip through the aqueous cleaner.  The boards are
originally processed in a panel but some require rework or additional
processing once they have been depanelized.

Can anyone suggest a method to secure these small boards inside the wash
racks as to prevent this damage?

Mark Charlton



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