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 > >