Hi, Daan,

I see your problem. Such a part would look like a supernova through a P&P
vision system. I don't know what your throughput volume is,  and the
component body looks like nylon, but can you apply a blackener to the
components that will wash off in the cleaning process, if you use a
cleaning process? Or a coloured adhesive tape that can be peeled off after
assembly - anything to cut down the glare.

I suggest you also explain the problem to the part manufacturer and plead
with him to change the body colour.

Pete Duncan





                    "d. terstegge"
                    <[log in to unmask]        To:     [log in to unmask]
                    GROUP.COM>                       cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
                    Sent by: TechNet                 Subject:     [TN] Pick&place of white coil
                    <[log in to unmask]>


                    05/11/01 04:38 PM
                    Please respond to
                    "TechNet E-Mail Forum.";
                    Please respond to "d.
                    terstegge"






Hi All,

I just sent Steve a photograph that he genereously placed on in his
CyberHouse at http://stevezeva.homestead.com/index.html. It's a picture of
a Coilcraft coil with a white bottom and goldplated terminations.
Our designers are planning to use these parts on some of our new products,
but unfortunately the placement on our Philips (Assembleon) machines is
inaccurate due to the fact that there's not enough contrast for recognition
by the vision-system. Both the gold and the white substrate are highly
reflective when illuminated on the vision system.

Our designers see this coil as just another standard part, and they don't
want to hear about any such problems.
To my opinion it is ridiculeous that component manufacturers make their
parts like this (I mean they could give some surface treatment to their
alumina substrates).

I really like to know how other Techies think about this. Is this a
standard part that needs an in-house technical solution, or should a Smart
Designer try to avoid using such parts ?

Kind regards,

Daan Terstegge
Unclassified mail
Personal Website: http://www.smtinfo.net

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