Electronics Forum | Thu Feb 10 09:14:09 EST 2005 | davef
Don't kid yourself, something has changed. * Worn stencils should produce better release and greater paste deposits than less worn stencils. * Consider inspecting the effectiveness of your cleaning process with a X10 magnifier. * Temperature in your
Electronics Forum | Thu Mar 31 07:56:31 EST 2005 | cn
I agree with chuck, but would like to add. 2D is a great option and helps to keep your printing process in check, it will measure the x & y coverage on the pad. It will help you determin when your stencil aps become clogged or when the bottom of your
Electronics Forum | Fri Apr 27 10:33:58 EDT 2007 | ck_the_flip
Jeremy, well said! Thanks for "validating" my theory... LOL I agree that the sampling frequency, AND methodology are key things with 3D inspection. 3D will give you some insight onto how your paste (rheology, viscosity, thixotropy)AND process are
Electronics Forum | Mon Feb 21 04:04:21 EST 2005 | abhirami
1.67 always on the sample boards measured. This is very fast and pretty good measurement for a paste dispense control. Boards do not stand out-side for long times. Inspect the height for critical components only, in the initial stages. Once your Cpk
Electronics Forum | Thu Apr 26 13:17:10 EDT 2007 | jerrysaise
�It adds NO VALUE whatsoever to do 3D inspection as part of in-line production.�
Electronics Forum | Tue Aug 04 22:57:07 EDT 2009 | davef
Wikipedia: http://en.wikipedia.org/wiki/Automated_optical_inspection Facebook: http://www.youtube.com/watch?v=So_DMNGZHAQ
Electronics Forum | Mon Feb 21 02:02:54 EST 2005 | JSS
First of all THANKS for thr reply. I totally agree with u that paste dried,stencil aperture clogged like probs comes during the production but we hv a visual inspection stage (with 5X illuminated lamp)after printing process and before inserting the
Electronics Forum | Thu Apr 26 09:03:35 EDT 2007 | ck_the_flip
3d is good for initial verification that your screen printer and stencil is producing the desired paste height. 2D verification is more than sufficient during regular production. That being said, your best bet for a 3D machine is to go cheap - buy
Electronics Forum | Tue Feb 22 07:58:16 EST 2005 | davef
We hear you. If it's not broken, why fix it? Right? Well intentioned, but not very educated customers seems to be part of the bane of existance of process engineers at contractors. First, as a previous poster said, paste height is an improper mea
Electronics Forum | Thu May 24 19:27:50 EDT 2007 | kevinjm
We have a similiar problem with kester em907, a pb free paste. You say that your AOI system picks up blocked apertures, do you mean that the printers own camera looks at the stencil and sees apertures blocked? Or, is it picking up insufficient paste
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