totally agree.
On Apr 17, 2018, at 9:38 AM, Stadem, Richard D wrote:
> Consider also the required magnification. While Joyce's suggestion
> is a good one for the purpose of screening false calls, the
> magnification for different features on a given circuit board must
> fall within IPC-A-610 and/or J-STD-001 requirements. This is
> typically 20x for solder joints, less for most other applications
> such as checking polarity, epoxy staking/bonding, etc. (naked eye,
> 4-10X for referee purposes). If a final call on an AOI defect is
> going to be determined by the referee tool, it better have the
> correct magnification capability for what is being inspected.
> Things like particulate matter, etc, are also naked eye, 4-10x
> referee, and so on and so forth. If the inspector/operator is not
> trained to use the correct magnification for what he/she is looking
> at, you will have all kinds of issues and non-value-added rework
> and touchup costs packed into your process. Not only you need to
> keep the inspection tool well calibrated, you also need to keep the
> Inspector's eyeballs well calibrated as well! They all have to be
> on the same page.
>
> -----Original Message-----
> From: Stadem, Richard D
> Sent: Tuesday, April 17, 2018 8:27 AM
> To: [log in to unmask]; 'Riccardo Inverardi'
> Subject: RE: [TN] Handy Magnifiers anyone?
>
> You may wish to check the Mantis for ESD. The one I had experience
> with was a huge ESD generator (tribo-charged to greater than 10,000
> volts using a calibrated field meter). No matter what you select,
> just be sure it is ESD-safe. Every single board is going to go by
> under your inspection tool. Not having an ESD-safe tool is not very
> smart.
> You would think the manufacturers of inspection systems that are
> targeted for electronics use would make sure they are ESD-safe.
> Guess what? Most are not!
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Riccardo Inverardi
> Sent: Tuesday, April 17, 2018 4:25 AM
> To: [log in to unmask]
> Subject: [TN] Handy Magnifiers anyone?
>
> Greetings to all TechNetters, I am facing a problem and I hope that
> the great experience of the forum can help me.
>
>
>
> I have to provide our AOI operators with an adequate magnification
> and illumination aid to inspect those features that a 2D AOI cannot
> reliably inspect and/or to discriminate false calls from real defects.
>
> We have evaluated different magnification aids: from digital
> magnifiers, to binocular microscopes. The absolutely best option is
> a stereo microscope such as Vision Engineering's Mantis line: depth
> perception is maintained and once the focus has been set, it's easy
> to switch from focusing on the PC screen and inspecting the board.
>
> Disadvantages are high cost, but the worst is that they are
> cumbersome.
>
> On the other hand, tabletop magnifiers are cheap, have good
> illumination and they are really handy. It's a pity that they
> usually are too cheap and most of all, it seems that no one makes
> them with adequate magnifying power.
>
>
>
> Currently, our operators have to work ideally in a 1.5 square
> meters' area (actually, they are not trapped in: it's just a
> "designated area").
>
>
>
> Any suggestion, past experience and lessons learned that you can
> share will be highly appreciated.
>
>
>
> Have a nice day,
>
> Riccardo Inverardi
> AOI Programmer | IPC/J-STD-001 + IPC-A-610 Certified IPC Trainer
>
>
> <http://www.inteaengineering.it/> INTEA ENGINEERING via Chiusure
> 20 Sale Marasino (BS) T +39 030 9824406 | F +39 030 9824407
>
>
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