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Date: | Tue, 30 Apr 96 14:30:26 EST |
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Two options:
(1) Ultra-high pressure from a distance
(2) Lower pressure, higher impingement closer to work surface
Pumps to accomplish #1 are expensive; #2 involves a little plumbing
but is more effective and efficient - hence IBM's development of the
'fluid head'.
Don't worry about line pressure; you need impingement. Minimize
nozzle distance and impact angle (perpendicular to panel surface is
ideal). Spraying Systems Co. 'Flatjet' No. 3504 works well - it
passes 0.63 gpm at 100 psi.
J.Felts
PC World
______________________________ Reply Separator _________________________________
Subject: Deburring
Author: [log in to unmask] at INET
Date: 4/29/96 9:48 PM
Can anyone shed some light on the necessary water pressure required
in the rinse section of a PWB deburring machine to clear drilling
debris from small vias. We are drilling 13.5 mil holes and some 10
mil holes. Occasionally, we experience some particles of drill (or
back-up material) debris left in a few holes. My calculations show
that for the nozzle I selected, a 600 psig nozzle pressure results in
0.068 grams of force in a 13.5 mil hole. Is that enough? What does
it take to get the debris out? The vendor is offering options for
600, 1500, & 2000 psig. The price rises considerably with each
option. What do i need?
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