Electronics Forum | Wed Aug 16 05:29:13 EDT 2000 | Charles S.
We have had a similar problem here and looked to using a bar code reader system available from our pick and place machine manufacturer (Siemens) the big downside of this was that we needed to maintain a barcode database for all our components to ensu
Electronics Forum | Thu Aug 17 13:26:53 EDT 2000 | John
Thanks for the responses. Actually we already use a reel change log with two verifications, a first off checklist with two verificaitons, and a first off inspection with two verifications. Unfortunately, the part numbers were pretty close, and the
Electronics Forum | Tue Aug 15 08:36:57 EDT 2000 | Mike
I will look into why you didn't receive the July issue of the SMT Express, but the August issue doesn't go out until tomorrow. Also, we don't send a notification when you change your email address, however, the address you posted with is the same one
Electronics Forum | Mon Aug 14 14:04:52 EDT 2000 | Phil Lauziere
Folks, What's the latest on stencil cleaning technologies; particlarly 'spray' (whether air or emmersion )versus 'ultrasonic' ?? What are your experiences with this ?? Has anyone completing any testing on cleaners recently - that you'd be willin
Electronics Forum | Wed Aug 16 12:43:04 EDT 2000 | genglish
Recently I completed a process evaluation on various stencil / misprinted PCB cleaning systems. They were both ultrasonic (theoretically can damage PCB�s) and the more conventional method of high pressure rotary bar method. I found that the best sys
Electronics Forum | Wed Aug 16 18:03:10 EDT 2000 | John Thorup
Hello CK Do I understand you correctly that you are reflow soldering a copper case containing a previously assembled PCA? Insulation would seem to pose a few problems that would need to be passed on by the design engineer. 1. Keeping the heat of refl
Electronics Forum | Sat Aug 12 09:47:36 EDT 2000 | Dave F
GJ: If your supplier uses a conformal coating that "must be applied to a clean surface," then you are using the wrong supplier and no amount of twiddling with your N2 levels will change this. NC fluxes are inherently "dirty" and nothing aside of cle
Electronics Forum | Fri Aug 11 08:52:11 EDT 2000 | vickij
Kyle: I have also used the Kester, and the biggest difference I found between the two is that the MultiCore is a lot thicker. I had to make some printer adjustments to use the Kester; I had to use a little less squeege pressure to get a clean print
Electronics Forum | Wed Aug 09 16:30:43 EDT 2000 | MarkS
Has anyone had (successful) experience placing testpoint vias under BGAs? We already have conventional vias, but we're contemplating converting them into testpoints (probably by enlarging the bottom-side copper diameter to .036" and opening the bott
Electronics Forum | Tue Aug 08 20:43:41 EDT 2000 | Dave F
Tom: So is warp or is it twist? They�re different problems, possibly with different sources!!! And possibly different solutions!!! Consultants to talk to are: Earl Moon (pod@vcn.com), Werner Engelmeyer (engelmaier@aol.com), Les Hymes (les.hymes@w
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