>>> "Yves.Dupuis" <[log in to unmask]> 09/19/01 11:24AM >>>
Hi Peter,
On your first point: "what variables tend to cause this defect?", I
would say that the answer would include amount of flux applied, pre-heat
profile and immersion depth from the machine standpoint. From the product
standpoint, factors affecting results include finish and layout.
Insufficient flux, excessive or insufficient pre-heating, insufficient
immersion depth could all be part of your problem. Also, many people have to
use more flux or different process parameters to successfully solder
immersion gold finish versions of a product previously built on HASL. This
is also true of some other finishes.
On your second point, it is possible that a spray fluxer would make
it easier to control exactly how much flux goes on and when. This will only
reduce your defects if level and/or consistency of flux application is a
cause of those defects.
Are there any obvious patterns to your insufficient solder defects ?
Are certain parts, times, boards, more likely to show this defect ?
I'm sure there are a good number of people on the forum that would
be willing and able to answer specific questions on your problems. If I can
help, feel free to contact me.
yves
Yves Dupuis
Process Engineering
Leitch Technology
25 Dyas Road, North York, Ontario M3B 1V7
Phone: 416-445-9929 X3389 / Fax: 416-445-7927
> -----Original Message-----
> From: Jack Crawford [SMTP:[log in to unmask]]
> Sent: Tuesday, September 18, 2001 2:20 PM
> To: [log in to unmask]
> Subject: [TN] Insufficient solder, spray fluxer
>
> >>> Peter Crain <[log in to unmask]> 09/18/01 12:55PM >>>
>
> I am having troubles with insufficient solder coming from wave solder
> machine.
>
> First, what variables tend to cause this defect?
>
> Second, we have a base model wave solder with a foam fluxer. I am thinking
> of purchasing a spray fluxer for our machine to help reduce this defect.
> Would this greatly reduce defects from the wave machine?
>
> I am new engineer in the electronic manufacturing world so please take it
> easy on me if my questions are too broad and simple.
>
> Peter Crain
> GE Harris
> Calgary, Alberta, Canada
>
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