Hi all,
Process stability with large or complex nozzles can be improved by
imbedding heater elements within the nozzle itself. This keeps the
"nozzle, chimney, flow-well, etc." at a constant temperature irregardless of
time between solder flow.
Best Regards,
Brad Vanderhoof
AITI
----- Original Message -----
Sent: Saturday, May 10, 2003 7:38
AM
Subject: Re: [TN] Solder Fountain
Parameters
Hi Gary, LTNS!
You want to run the pump speed high enough
to get a flow over each side of the nozzle (level is obviously important) but
not so high you develop turbulence on the surface. I've seen some poorly
designed nozzles that cannot achieve this and might take some "do-over" to get
it right. Another thing is process repeatability, and in order to get an
accurate "fix" on the wave height setting is to add a pump motor speed display
to the machine. The pot and corresponding graticule provided by the
manufacturer(s) isn't all that accurate to start with, and the speed control
board can be messed with as well as drift over time.
Give me a call one day when you have a free
moment. You and I go back to the late 80's with Treiber.
Regards,
Ed Popielarski
QTA Machine
10 Mc Laren, Ste
D
Irvine, Ca. 92618
Phone:949-581-6601
Fax: 949-581-2448
Cel:
949-337-2578
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