lol...I don't doubt it Doug, but the answers to those questions you would
receive from me will be the funniest BS you ever heard.
Lloyd Duso
Plant Manager
Diamond-MT
(814) 535-3505
www.Diamond-mt.com
On Thu, Sep 22, 2016 at 4:41 PM, Douglas Pauls <
[log in to unmask]> wrote:
> Ohhhhh no, you don't want me as a customer. I know ALL the unanswerable
> questions to ask. Could be a major P.I.T.A. if I wanted to be....
>
>
> Doug Pauls
> Principal Materials and Process Engineer
> Rockwell Collins
>
> On Thu, Sep 22, 2016 at 3:20 PM, lduso - Diamond-MT.com <
> [log in to unmask]> wrote:
>
>> Rich, I couldn't agree more. And our batting average is about the same as
>> yours, .500.
>>
>> We need more customers like Doug.
>>
>> Lloyd Duso
>> Plant Manager
>> Diamond-MT
>> (814) 535-3505
>> www.Diamond-mt.com
>>
>> On Thu, Sep 22, 2016 at 3:38 PM, Richard Kraszewski <
>> [log in to unmask]> wrote:
>>
>> > Steve - We see the same issue when it gets really thin. We proceed as
>> > follows:
>> >
>> > > State that fluorescence of a coating is an aide to inspection, not a
>> > requirement.
>> > > Coating will often thin -out at sharp edges. Laws of physics
>> related
>> > to surface tension & surface energy.
>> > > If insufficient coating is suspected with UV & their naked eye
>> > (spectacles are OK), operators can use up to 4X magnification and
>> nature
>> > white lighting to determine if coating is present based upon gloss.
>> >
>> > Common customer reply is that if coating is indeed present, then is
>> must
>> > be too thin to be in specification.
>> > To which we reply back that the industry (IPC) understands this
>> > phenomenon and a Qpanel hence can be used to monitor and control
>> > thickness. If perfect coating uniformity is required , parylene
>> should
>> > be called out.
>> >
>> > We are successful in the above argument with customers perhaps 50% of
>> the
>> > time at best. Rest of the time we touch up. ;>(
>> >
>> > Rich Kraszewski / PLX
>> >
>> > -----Original Message-----
>> > From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
>> > Sent: Thursday, September 22, 2016 10:36 AM
>> > To: [log in to unmask]
>> > Subject: Re: [TN] Fwd: coating complaint
>> >
>> > Hi Guy,
>> >
>> > I got your photos posted, had to do a little repair with my web page
>> > software after the last Windows update. Here are the images:
>> >
>> > http://stevezeva.homestead.com/coating_under_no_filter.jpg
>> > http://stevezeva.homestead.com/customer_complaint-skips.jpg
>> > http://stevezeva.homestead.com/coating_under_UV2.jpg
>> > http://stevezeva.homestead.com/coating_under_UV2-1.jpg
>> >
>> > I see the same thing on component edges sometimes. It's like the UV
>> tracer
>> > in the coating thins out or separates out and under UV light it looks
>> like
>> > there's no coating. We've got stuff kicked from a customer for this
>> > problem. If I can find the photos I'll post mine...
>> >
>> > Steve
>> >
>> > On Thu, Sep 22, 2016 at 7:56 AM, Guy Ramsey <[log in to unmask]>
>> wrote:
>> >
>> > > I am in over my head. I have little to no experience with conformal
>> > > coating. Can anyone with more experience comment?
>> > > thanks,
>> > > Guy
>> > > ---------- Forwarded message ----------
>> > > From: Guy Ramsey <[log in to unmask]>
>> > > Date: Thu, Sep 22, 2016 at 9:51 AM
>> > > Subject: Fwd: coating complaint
>> > > To: [log in to unmask]
>> > >
>> > >
>> > > I sent this message on to a friend who posts images for review by
>> > > members of the IPC technet.
>> > > We are looking for technical support and user experiences with this
>> > > material.
>> > > If we inspect at 5x-10x magnification we can observe the conditions
>> > > that our customer is complaining about.
>> > > But, our application process seems well controlled and the condition
>> > > does not exist when the material is first dispensed. The material
>> > > flows as it cures and becomes thin at the edges of the components.
>> > > Thin enough so that is does not glow under UV light. In some instances
>> > > components appear to have no coating (when viewed under UV). However
>> > > under normal light it is easy to see the parts are coated.
>> > > Is this normal behavior for the material? Can we expect normal
>> > > performance from the the coating?
>> > > Guy Ramsey
>> > >
>> > > ---------- Forwarded message ----------
>> > > From: Guy Ramsey <[log in to unmask]>
>> > > Date: Thu, Sep 22, 2016 at 9:41 AM
>> > > Subject: coating complaint
>> > > To: Steve Gregory <[log in to unmask]>
>> > >
>> > >
>> > > Hi Steve,
>> > > Can you post these images on your homestead page for the group please?
>> > > The images are of acrylic coating Humiseal 1B31. We are applying a
>> > > thinned mix using a dispenser through a fine needle (25AWG).
>> > >
>> > > Under room lighting we can see coating. Under UV light, at this
>> > > magnification our customer is complaining about skips. I don't have
>> > > enough experience with the material to know if this is normal or not.
>> > > Notice how the resistor appears to have no coating under UV, but in
>> > > normal light it is clearly coated.
>> > > Also notice how the coating flows off of the components at the edges,
>> > > leaving only a thin coating that may not glow under UV light.
>> > > Are these normal attributes of this type coating.
>> > >
>> > > We do not see this with Urethane spray coatings.
>> > >
>> >
>> > --
>> >
>> >
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>> > email in error, please notify the sender immediately and delete the
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>> >
>>
>
>
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