Electronics Forum | Fri Jan 09 08:20:43 EST 2009 | caerleon
Does anyone have design knowledge of why some manufacturers remove solder resist from the area around pads on fine pitch devices? What purpose does it serve? I only know that it would be better for AOI as you would not have light being reflected fro
Electronics Forum | Wed Jan 17 18:08:51 EST 2007 | John S.
We use a fairly simple system. IPC put out standards 7912A and 9261A to define opportunities. Basicly the "number of components" + "number of solder joints" = "number of opportunities." Some six sigma benchmarking studies indicated "Sigma Level" =
Electronics Forum | Thu Oct 27 16:47:55 EDT 2011 | sjs2303
Has anyone any experience with using the latest version of this software? If so I am interested in hearing how you use it to reflect the different metrics for quality reports.
Electronics Forum | Wed Aug 07 13:15:21 EDT 2013 | simplycomplex85
http://imgur.com/a/ujk7k Maybe pictures will help. The solder is dull (not dark) grey, so its not reflective.
Electronics Forum | Mon Mar 31 09:16:41 EDT 2008 | davef
What is changing the marking on the part? * Is flux residue coating the part to change the the way light reflects from the part surface? [Run a board with tape on the part, then remove the tape prior to AOI] * Is the heat of the oven changing the mar
Electronics Forum | Thu May 26 06:59:06 EDT 2005 | CLampron
Good Morning, We have several Mirtec table top machines. We bought the first one when it was under the Samsung name. We had the advantage of doing a side by side comparison with several other systems. The Mirtec was the leader in performance. Since
Electronics Forum | Wed Aug 07 10:40:19 EDT 2013 | simplycomplex85
They're hand placed and hand trimmed so they may be straight, may not be. And the solder (I think because its lead free) is a dull grey color to there is no reflection from any of it. The solder, lead, and board all show as a dark grey color under re
Electronics Forum | Wed Aug 07 11:36:19 EDT 2013 | rway
By "dark grey color" do you mean with the histogram? Red or black maybe, but grey? Are you using a color camera? Can you use a reverse image? Does a bare unsoldered joint appear bright or reflective under red lighting? You could look for a low wh
Electronics Forum | Wed Aug 07 16:06:26 EDT 2013 | rway
What type of filtering are you using? Your solder inspection should be using Histogram Inspection as the Decision and red filter for preprocess. Make sure your settings are correct and check your binarized image under Histogram setup. you should s
Electronics Forum | Wed Aug 07 15:41:28 EDT 2013 | simplycomplex85
Absence of solder is just black/super dark red which still falls under any percent I could put in there. So it passes. Maybe I'm a bit confused on how the machine checks solder in general anyway... 0%-60% is a pass by default. Thats anything dark - s
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