Electronics Forum | Thu Jun 03 01:33:40 EDT 1999 | Bubba
| Here is my question. We have several fuji CP's in our shop, every once in a while the first couple of parts placed are off the pads. When we move the parts further down in the sequence they are fine. What is going on? Has anyone had this problem an
Electronics Forum | Wed Dec 11 01:06:28 EST 2002 | iman
Was visting a production floor, of an SMT assembly line, and saw operators using mechanical pencils to write "process stage identification markings" onto the SOIC packages, after the post-reflow inspection. was wondering if such pencil markings is c
Electronics Forum | Mon Jun 04 23:52:57 EDT 2012 | rway
Actually, if you experience lack of witness marks, you probably have a problem. Witness marks are OK and will not affect your assembly. I assume this is an SMT assembly we are talking about, in which case, this is what your test pads are for. You
Electronics Forum | Tue May 28 21:00:59 EDT 2002 | davef
That is the rub here, isn�t it? For those posting, it�s easier [but much slower] to start a new thread than to search the archives. [And posters could view their issue so unique and novel that it could never have been discussed several years earlie
Electronics Forum | Wed Oct 24 02:19:34 EDT 2001 | Leo Gapasin
We have been monitoring our solder defects at post-SMT, post-Wave, etc.in our plant. I want to compare our process performance to a "bench mark" for solder defects at post-SMT. The question I have is what is the "bench mark" for soldering defects in
Electronics Forum | Thu Jan 11 08:20:55 EST 2007 | davef
Marking * SMD marking list on http://www.tkb-4u.com is more update than "The SMD Codebook" on http://www.marsport.demon.co.uk/smd/smdcode.htm * http://www.marsport.demon.co.uk/smd/mainframe.htm * http://www.chipdocs.com/pcat/015/1124.html * http:/
Electronics Forum | Wed Oct 31 16:56:11 EDT 2007 | glenearl
Has anyone ever looked into the possibility for laser marking 1812 size X7R ceramic chip capacitors injecting sufficient energy to cause cracking when voltage is applied? If so, what were the findings? We are having failures of caps from one manufa
Electronics Forum | Wed Apr 30 10:43:28 EDT 2008 | dyoungquist
This runs up a big caution flag in my mind! Counterfiet parts are often produced by removing the original markings and remarking the ICs with different part and lot numbers. I am not accusing you of this BUT we have recently been bit by counterfei
Electronics Forum | Tue Oct 14 08:04:11 EDT 2008 | bickt
Does anyone have the same issue as i do with component markings?? I am using a AOI machine to inspect and the parts that our girl buys are a mess. the ink is smeared and not readable. I was told there is no quality level when you buy parts. Doe
Electronics Forum | Tue Mar 19 07:04:21 EDT 2013 | Flux Capacitor
When I enter in the program data for a particular PCB on our Juki, I choose a board fiducial and enter its X Y location as the "bad mark position". (Although I'm not sure if your model refers to this as a "bad mark" as well.) Place a sticker over tha
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