Electronics Forum | Thu Aug 08 07:19:52 EDT 2019 | SMTA-Joe
We do this often. Including fences with many internal structures. I assume you are hand soldering the fences. Are you heating the assembly during the soldering process? We typically have no issues with this operation, on a variety of assembly typ
Electronics Forum | Mon Aug 12 14:00:38 EDT 2019 | slthomas
While I agree that you need to see an MD ASAP, it might help your provider to actually know what you were breathing, and I would worry way less about the materials in the components than I would about the flux from the solder paste. Edited to add, a
Electronics Forum | Mon Aug 12 21:54:33 EDT 2019 | davef
I've never seen successful printing with a step as deep as you seem to be saying. The keep out would have to be jigundous!!!! SMTnet Technical Library: https://smtnet.com/library/files/upload/Step-Stencils-laserjob.pdf I'd guess * Maximum step
Electronics Forum | Tue Aug 13 11:21:04 EDT 2019 | slthomas
A profiler can't distinguish where your heat is coming from, so if you're significantly imbalanced between top and bottom heat (could be an oven problem or your settings) it might still be a cause. You don't say whether or not your top and bottom s
Electronics Forum | Fri Aug 16 12:32:56 EDT 2019 | edhare
Steve, Yes, in my experience clients send in field failures (so latent failures) that exhibit internal shorts when a secondary fracture propagates from a knit line fracture. These eventually short due to electro-migration from plate-to-plate through
Electronics Forum | Mon Aug 19 11:36:27 EDT 2019 | bulur
How does no-clean flux residues on a PCB assembly impact the ROSE testing? Does no-clean flux residues on the PCBA dissolve in solution of ROSE tester and increase ionic contaminants level in terms of NaCl per surface area? Is ROSE tester solution (a
Electronics Forum | Tue Aug 27 18:14:12 EDT 2019 | spoiltforchoice
You don't want an AOI machine you want an FAI (First Article Inspection) like one of these http://www.aoisystems.com/Scanner-Based-FA-Inspector.html (note some of the products here call themselves AOI, arguably they are not.) Or https://www.quins.de/
Electronics Forum | Wed Sep 04 12:01:59 EDT 2019 | slthomas
My recollection of the 4c is fuzzy but I know that there's a ribbon cable on the head that gets some abuse when the head rotates. Seems like mine would eventually break at the crimps and I had to replace it a few times. Eventually I bought the parts
Electronics Forum | Wed Mar 03 21:34:39 EST 2021 | stephendo
Dr Lasky has a blog and has some posts on this subject. If I have time I will look for them later. Realistically you can expect a no excuses utilisation rate around 15%. You will believe it after I find the blog posts. Of course everyone uses some
Electronics Forum | Tue Sep 10 11:00:27 EDT 2019 | slthomas
Sometimes it's just because they want "data art" on the walls. I was once tasked with developing an SPC program for our SMT lines. It was crudely implemented (plotting points on a chart template) because this was a BIFF (big improvements for free) p
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