Electronics Forum | Thu Oct 21 12:02:05 EDT 2010 | kjs123p
My company is trying to develop a system to take into account the SMT parts scrapped by the machine and also the parts lost during loading and unloading feeders. This is causing part shortages for us. I would appreciate if anyone could share how th
Electronics Forum | Thu Oct 21 15:30:56 EDT 2010 | remullis
Search on Attrition, I think most companies start around 2% across the board. I have adjusted mine higher for 0603, and parts where I experience tape issues constantly. We are running parts with date codes back 2006,2008.
Electronics Forum | Thu Oct 21 15:35:38 EDT 2010 | davef
While you're waiting for others to reply, search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=43910
Electronics Forum | Mon Oct 25 17:03:43 EDT 2010 | jamyboy
I am wondering why the PnP manufacturers are not adding more modern part packages to their databases? Let me know what types of packages you are looking for and if I have them I will send you the data, from our database.
Electronics Forum | Tue Oct 26 16:31:50 EDT 2010 | sai
All of the Mydata machine comes with a standard library package; 0402,0603,0805,1206, soic8 and so on.
Electronics Forum | Fri Nov 05 15:29:25 EDT 2010 | mgrimes
I can help on this manual set. Please email me at matt@easiky.com or call 859.499.3455.
Electronics Forum | Wed Oct 27 08:46:20 EDT 2010 | adlsmt
We are having metal migration issues with SOT 223 and TO 220 parts runing at 500V DC. We are using no clean flux and suspect that is causing the problem. Does anyone have any experience with these levels of DC voltages or know of any consulting firm
Electronics Forum | Thu Oct 28 09:52:39 EDT 2010 | dyoungquist
Try rotating your board 90 degrees when running it through your oven. Will probably solve the tombstoning issue on that cap but might cause tombstoning elsewhere.
Electronics Forum | Thu Oct 28 16:15:24 EDT 2010 | duchoang
If everything else is OK, capacitors quality could be the cause of this issue. Some caps could have been contaminated or the metal mass not even between two ends. Try different kind (manufacturer)of cap.
Electronics Forum | Fri Oct 29 07:10:40 EDT 2010 | scottp
I agree with DucHoang. If your board and reflow profile have not changed then I would suspect incoming parts. We've seen tombstones when a chip supplier had plating problems.