Has anyone been able to run a passing Gauge R&R on a device like the Defelsko Positector?
David Bealer
Sr. Process Engineer
office 800-637-2645 x6022 cell 217-474-8760
-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of lduso - Diamond-MT.com
Sent: Monday, August 17, 2020 7:22 AM
To: [log in to unmask]
Subject: Re: [TN] Conformal coat wet to dry evaporation
[External Sender]
Andy
Graham is correct. HDBK-830 is the better choice. It is a guide to help people understand everything about the coating application. It even includes a section on measuring, 8.11.1. The CC-830 is a material qualification spec only. It is the spec outlining all the testing requirements of conformal coatings. It is what the coating manufacturers follow to qualify their products. Actually, the handbook does a great job of explaining the relationship of the different IPC specs in sections 2.15 & 2.16.
We are like Jeff. We measure with coupons for thickness verification after the coating is dry to the touch. You can use a micrometer or as many do, a device like the Defelsko Positector.
Lloyd Duso
Diamond-MT
(814) 535-3505
www.Diamond-mt.com
On Mon, Aug 17, 2020 at 7:49 AM Andrew Hoey <[log in to unmask]>
wrote:
> Hi Graham,
>
> Thanks for the help,
>
> We overlooked micrometers to be honest!
>
> I have a copy of the HDBK-830, is the CC-830 more suitable?
>
> We conformal coat a variety of boards due to customer requirements -
> most of them are flying or going underwater.
> We've been conformally coating for about 6 years now but it recently
> got picked up by an auditor that our verification methods were not
> adequate, hence our attempts to put proper controls in place before
> those pesky auditors return!
>
> Thanks,
>
> Andy
>
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