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June 2001

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Subject:
From:
Paul Klasek <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 13 Jun 2001 17:11:32 +1000
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Hell'oo Bill , did Yo' forget me that quickly ?

Gemini keeps up with My19 (14000+/h) easy , years on , with Inge we threaded
yarns mile long on this subject,
piece of cake ; Steve even tracked some article in PCB Assembly by Chuck
Bauer (ex SMTA pres.)
when he was down here . We did DO actually even better than he said .

Who needs to be converted from small runs on stencil drags (good for long
runs/volumes, undisputed) ?
Archives must be full of useful memos too .

It is a very much a norm process , not only viable , no pitch, from Gemini
up in line ,
friend in Philips in Manila had a dozen of these sputters ; very much
repeatable, us with 200g syringes,
1414 if You don't rush,  Indium paste and custom syringes we developed with
helpful folks in US.

Used to run 24h round the clock, did not miss a beat , unless mistreated
(dry , sleep mode best in say hourly wake up dots on side board, to keep
nozzles clean.

What can do Yo' in for mate ? , make a wish list (be specific);
since brothers in arms woke me up to express myself (did my best to spare
Yo).


paul



............................................................................
...........................................

Hello all,

I've been watching this thread for a few days now hearing about how solder
paste can be dispensed from an automated system.

My experience has not turned out very well with only very limited success.
We have a Camalot 1414, even bought the special displacement pump designed
for this application and attempted to dispense solder paste. I just could
not get the system to be repeatable. Once I had a set up, repeating the next

day or even the next hour was impossible. I tried different pastes,
different particle sizes, needle sizes, etc. etc. One of the biggest
problems that I had was coining. This is where the particles compressed to
form a solid plug where the paste entered the dispensing needle.

I gave up on this method, settling instead on using microstencils to apply
paste.

I would like to know of anyone who has had success with dispensing solder
paste. I would like to know some particulars about the process. (paste,
needle size, pump pressures, etc) I would not mind trying this again if I
could just get some help with this.

However, if you've never done this and you're thinking that this is a viable

process, I am advising to be very careful about sales pitches that claim
that solder paste dispensing can be done. I don't think that it is a
repeatable process.

Bill Kasprzak
Moog Inc., Electronic Assembly Engineering

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