Electronics Forum | Mon May 09 12:26:17 EDT 2005 | stepheniii
If followed, would the following strategy meet the requirements of IPC/JEDEC J-STD-033A; All MSD components are either exposed for less than 1/2 an hour or final reflowed within 12 hours of opening. What I mean by exposed is any time the parts are n
Electronics Forum | Fri Jul 15 13:28:55 EDT 2005 | Brian
A process consists of much more than just thee machine. When developing a cause and effect diagram ffor the process, there are many parameters that fall outside the machine itself. There are Man, Machine, Methods, and Materials. Just monitoring th
Electronics Forum | Thu Aug 03 19:34:17 EDT 2006 | davef
You might consider an oxygen monitor (or lack of oxygen monitor). A fast response-rate analyzer should be used. There are several types of analyzers on the market and each has different limitations. * If you are looking for a measurement ranging fr
Electronics Forum | Sat Dec 16 22:43:56 EST 2006 | Ola
Hi, If I remember correctly (it has been about 15 years since i worked with one of these.)The old MCS machine is based upon a Motorola 6800/68000-series Micro processor and the operating system is OS/9 from Microware Systems Corporation. This was a r
Electronics Forum | Mon Jan 08 03:47:47 EST 2007 | tk380514
as someone had said before, check you stencil and have it redesigned. I design our stencils for my factory and have inproved quality in BGA , QFP and 0603 case sizes. we did have 1 prototype series that used 0403 chips btu we had brand new feeders an
Electronics Forum | Wed Jan 17 21:56:57 EST 2007 | fastek
Here's why it all goes to China: Americans all want $100 per hour to change a light bulb yet refuse to pay any more than $10 for a cell phone and $500 for a computer. They only want to work 5 days per week, 7 hours a day and get one month off every
Electronics Forum | Thu Sep 20 16:06:23 EDT 2007 | jmelson
Are these shorts occuring after reflow, or are they shorted on the incoming boards before stuffing? If the latter, is the fabricator doing electrical test? How are these boards getting past their electrical test? Especially if multilayer, there's
Electronics Forum | Mon Jan 07 13:09:35 EST 2008 | stevek
As I told you, some carriers (trays) are limited > to 75 degree maximum, and from time to time > employees do not pay attention to this. This is > one of the reasons. The second reason is that 90 > degree still be problematic in a case of rebake
Electronics Forum | Mon Jun 13 07:20:10 EDT 2011 | scottp
It's more likely the warp is due to material issues. I've spent way more time than I'd care to admit running Thermoire with various profiles and there's pretty much nothing you can do to reduce warp via profile unless your current profile is truly a
Electronics Forum | Tue Mar 31 09:22:48 EDT 2015 | rgduval
I've always hated using machine specs....they're always best case scenarios, and nearly never capture actual through-put rates. Personally, I don't like using first-piece rates, either...unless you're looking for worst case scenarios. Usually, the
