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From: "John Gully" <[log in to unmask]>
Organization: CompuRoute, Inc.
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Date: Thu, 7 Mar 1996 10:51:15 +600 CDT
Subject: Vibrators
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Address,

No PUN intended.

Does anyone have experience in using external solution vibrators 
in Wet area Processes?  Ultrasonics is out of the question, due to
cost.  Direct attachment of vibrators to the plating tanks is out 
of the question, since we are using polypropylene tanks.  

For the past several weeks I've been evaluating Teflon and some 
new chemicals by manual vibration (a hammer to the plating racks).
I now know this works, but who and where do I get the vibrators 
from?  And what type of cost are we looking at?  

Can someone advise immediately.  I would like to continue my 
evaluations with automated vibrators.

Regards,

John Gulley - Process Engineering
email: [log in to unmask]
214-340-0543
======== Fwd by: Tony King / N ========
Vibration is used quite often in the board industry to remove entrapped air
bubbles from holes at electroless copper plating. I use them in most of the
key chemical tanks. The manufacturer of the vibrators is VIBCO and they sell
for $433.67 in McMaster Carr. Dont get the single speed,  get the vibrators
with the variable speed. The vaiable speed vibrators allow you to "tune" the
vibration frequency to the product in a rack. Once installed, as the
frequency is gradually changed you will see the various components of the
rack, flight bar and product individually vibrate more aggressively as the
respective vibrational frequencies are reached. Just tune the frequency
until you reach the desired level of vibration for the component in
question.  This variation is important because vibration is basically a
destructive process that can break welds and unscrew nuts etc., the tuning
allows you to zero-in on the target while minimizing future damage to the
rest of the line.

I also use a spring mounted stainless steel vibration frame suspended over
the tanks to maximize the transfer of vibrational energy into the rack and
away from the through-hole agitation frame. If interested in design call me.

Tony King
Elexsys International Inc.
Nashua, N.H.
603-886-0066
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