Iain,
Your coating coverage, and whether you can do without masking, depends on
the degree of edge definition, which in turn depends on pressures and feed
rates.  Nordson and PVA are the major players in the game.  We evaluated
both and liked the ease of programming of the PVA.  We have 4 in house and
PVA has been exemplary in their support.  Phil Kinner of Concoat can talk
to Nordson vs. PVA in the UK.   If you go the machine route, spring for an
additional head that allows syringe dispensing of fluids.

Doug Pauls




                      "Braddock, Iain"
                      <iain.braddock@MB        To:       [log in to unmask]
                      DA.CO.UK>                cc:
                      Sent by: TechNet         Subject:  [TN] Spray coating!
                      <[log in to unmask]>


                      02/16/2004 03:54
                      AM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to
                      "Braddock, Iain"






Gents,

I'm looking to replace an existing dip conformal coating m/c.  We're a
low/medium volume military establishment that spends an awful lot of time
masking up various boards.
I once saw a spray coating m/c in operation (several years ago!) and it
looked pretty slick, the engineer stated that manual masking was redundant
as the operation was carried out modifying the CAM data. If I remember
correctly the equipment was supposed to be accurate to ~1mm during the
spraying operation, is this correct / typical?
I'm looking for the pro's & con's of these systems, approximate cost of one
of these was bearing in mind through put is not an issue & suppliers,
ideally in the UK but not tied to this.

CIA,
        Iain.

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