Typical
He gives with one hand and takes it away with the other!
As for the rugby shirts - there are only 2 worth considering: England
and Wasps in that order! No second opinions required.
Graham
On 30 Jan 2008, at 14:00, Whittaker, Dewey (EHCOE) wrote:
> Steve,
> Graham made some excellent points and I agree with everything he said
> except we've bent a few lights with him in the past (Miller, of
> course).
> Speaking of good taste; you can't go wrong taking advice from Graham,
> unless it's about Rugby shirts, then I'd get a second opinion.
> Dewey
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Naisbitt
> Sent: Wednesday, January 30, 2008 6:04 AM
> To: [log in to unmask]
> Subject: Re: [TN] Humiseal UV40 Conformal Coating
>
> Hi Steve
>
> My apologies for this tardy reply - just bought another business which
> kept me rather busy.
>
> In answer to your question, take care.
>
> UV curables offer superb fast cure in seconds - on 2D objects. The
> tough part is getting the coating to cure where the light doesn't
> shine, and it is really tough to bend light!
>
> All UV's need to use a secondary cure mechanism to facilitate curing
> in shadow areas. Often this is a moisture cure, but often it fails to
> cure off for anything up to 7 days. Furthermore the product is
> ionically "active" until it has cured.
>
> Most of these issues have been addressed in UV40, but how fast you can
> put the end product in a box to ship is something you should check for
> yourself. The last thing you need is for the coating to flow out from
> underneath components whilst in transit.
>
> A comment if I may: Changing the coating to get the product out of the
> door is not the sort of design brief I would feel comfortable with. A
> full product re-qualification would be required.
>
> Back to the coating you do use: Most urethanes are moisture cure
> unless you are working with 1A33? If it is 1A33, then you should be
> able to ship sooner than 20 hours.
>
> I would prefer to see the following terms used:
>
> Tack-Free
> Dry
> Fully cured
>
> You can get most urethane coatings Dry - no flow-out during transit -
> within around 8 hours or less.
>
> Let me know which coating you use and I might be able to suggest an
> alternative schedule.
>
> Graham
>
> Gen3 Systems
> www.gen3systems.com - Engineering Reliability in Electronics
>
> On 25 Jan 2008, at 18:39, Steve Gregory wrote:
>
>> Hi Graham!
>>
>> It's funny that this thread should come up now. We just realized that
>> the urethane coating we use requires at least a 20-hour cure, and
>> everybody went into a tizzy about our ship schedule.
>>
>> I was then asked if I knew anything about UV cure coatings, which I
>> don't. So my first question is; how long does it need to cure before
>> it's ready to ship? I understand that it might not be fully cured and
>> ready for full service, but rarely, if ever, do we ship something to
>> our
>> customer that will get put into full service as soon as the they
>> receive
>> it.
>>
>> Also, what kind of UV source, or oven would you recommend?
>>
>> Thanks!
>>
>> Steve Gregory
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Naisbitt
>> Sent: Friday, January 25, 2008 11:55 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] Humiseal UV40 Conformal Coating
>>
>> Amol
>>
>> It is indeed a new coating, and a good one. There are several users
>> in
>> Europe who, not speaking English, don't see the Technet. What do you
>> need to know and I will see if I can help
>>
>> Kindest regards
>>
>> Graham Naisbitt
>>
>> Work: [log in to unmask]
>> Home: [log in to unmask]
>>
>>
>>
>>
>> On 23 Jan 2008, at 12:41, Kane, Amol (349) wrote:
>>
>>> Dear TechNetters,
>>> Does anybody have any Experience (good or bad) with Humiseal's UV40
>>> Conformal Coating?......we will need to use it on some of our boards
>>> soon and just wanted to test the waters to see if anybody else is
>>> already using it.
>>>
>>> We already do UV cure coatings and have the necessary setup.
>>>
>>> Thanks in advance,
>>> Amol
>>>
>>>
>>>
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