Electronics Forum | Sun Apr 25 11:30:12 EDT 1999 | Earl Moon
| Hello all, | | Our guys here still have some questions on the "optimized" profile which sees a more moderate ramp up straight to reflow temperatures versus the conventional profile which has a plateau at around 150 Celsius. If the optimized profi
Electronics Forum | Thu Mar 29 01:22:57 EST 2001 | chinaman
Hello everybody, Two questions came up during an audit (old topics once more): 1. we are not checking the solder paste volume/pad height after printing - others are using an AOI, but is it really necessary? We just do visual inspection randomly. We
Electronics Forum | Tue May 19 14:55:47 EDT 1998 | Dave F
| I am in the process of documenting the SMT process for the PCB Dept. I wonder if there may be something out there already formatted, I want to do an overall procedure instead of individual ones for now. Pat: We write our work instructions for in
Electronics Forum | Mon May 28 04:29:16 EDT 2001 | hello
we met the same problem with audit, and i make a tooling log for each stencil and in tooling log , set up some criteria for checking such as tension , mechanical damage, printing result ect. The stencil will be checked periodicly by process engineer,
Electronics Forum | Tue Feb 26 17:00:15 EST 2008 | slthomas
I haven't had the luxury of machine based pth assembly in quite a while, but when I did, given that the machines control which parts are inserted (and to a lesser degree where they are inserted) we decided not to perform inspection on that part of th
Electronics Forum | Wed Jun 24 14:10:01 EDT 2020 | stephendo
When I was looking into it previously it looked like you could pay a large fee and have your paperwork audited. I didn't find having auditors coming in and checking that you were actually following your paperwork. Having your ESD S20-20 procedures au
Electronics Forum | Tue Aug 03 15:23:56 EDT 2004 | tberkey
thanks for your response. I have a couple of reasons for evaluating this. 1) We recently purchased an ionograph to replace an outdate Omega meter. Correlation is required and in discussing this with several people, most wondered why we checked if we
Electronics Forum | Sun Aug 08 11:15:32 EDT 1999 | Earl Moon
| | Mike, | | | | Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo
Electronics Forum | Mon Apr 09 05:15:36 EDT 2001 | sinclair
Why measure solder volume? I believe if one understand the process well enough, the effort should be spent on area that will gives better indication of your solder printing process. From my personal experience, a lot of auditor knows little of the pr
Electronics Forum | Tue Jul 09 15:20:19 EDT 2002 | pjc
When you look at the capabilities of Combo machines they tend to sacrifice performance when compared to separate X-ray and AOI machines, meaning they don't do either the X-ray or AOI operations as well as a machine that was designed to do only one. A
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