You did not state the type of sprayer you plan to use..so I am assuming that
if you are converting now it is to a modern type of sprayer. Some of the
primitive sprayers IMO are junk. They only traverse from side to side with
no control of traverse speed, volume of flux applied,etc.etc.(Also creating
a Maint. issue) As stated in Lee's mail...If the system is airtight specific
gravity of the flux is no longer a concern. "Air tight" IMO is a pressurized
system under nitrogen. I have seen however that this is not always the case.
You may find that some people consider an "Air tight" system to be a covered
container....if the specific gravity does not wander they have deemed this
system successful.

One note on setup...To easily determine the amount of flux
applied/coverage/pattern you can use the glass plate or Fax paper method.
The glass plate will give you a good starting point but you usually have run
off. The fax paper taped to the glass plate seems to work rather well. It
absorbs the flux as it travels of the sprayer and usually gives you a good
visual pattern.

Daily Maint...Check your sprayer application tip daily for dried residues.
The new systems are fairly good at purging themselves..However a clogged tip
will effect spray pattern/volume/etc.

Scott




           -----Original Message-----
> From: Tempea, Ioan [SMTP:[log in to unmask]]
> Sent: Tuesday, January 09, 2001 12:18 PM
> To:   [log in to unmask]
> Subject:      [TN] Spray fluxing
>
> Hi again Technos,
>
> and a Happy New Year.
>
> Badly need some information on the principles of setting up spray fluxing
> in
> our wave soldering process. The main problem I have is that, with the foam
> fluxer, the target was clear, a certain specific gravity of the flux has
> to
> be observed in order to avoid poor soldering and dirty boards.
>
> Now, what do I have to monitor with the spray fluxer?
>
> Thanks,
> Ioan
>
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