Electronics Forum | Tue Jul 18 03:11:48 EDT 2017 | tsvetan
I recently bought: PCB Loader, Full Automatic Printer with vision with 10 seconds print time, 1 meter Inspection Conveyor, Samsung SM482+Feeders, 1 meter Inspection conveyor, Reflow oven for similar budged, all machines new. I bought them directl
Electronics Forum | Mon Sep 25 08:24:25 EDT 2017 | directx995
At the moment we do it like this: We get .csv or .txt pick and place file and .csv or excel bom file. Then I verify every single placement manualy with BOM and delete placements that are not listed on BOM. (Yes, you are right, I do it for 30 placeme
Electronics Forum | Mon Jan 06 20:53:23 EST 2020 | mikeyg12
Hello everyone! I have had this idea in my head to DIY a desktop KVM (without the V so I guess just a KM) board that I can solder USB A headers to with a DPDT switch. I designed the board and when I thought it was all good to go I proudly sent it of
Electronics Forum | Wed Aug 19 12:20:24 EDT 1998 | MARK J.
| Hi there, | I'm actually facing a lot of trouble with PCB's presenting up to 3mm of bow /twist at reception i.e. before assembly. The PCB size is 220 by 230mm. The boards are to be assembeled SMD double sides with 05.mm pitch on both sides. In orde
Electronics Forum | Sat Feb 17 14:21:54 EST 2007 | Muhammad Haris
Hi All, I am using YV100Xg YAMAHA Pick and Place Mounter Machine and I am facing a tilting problem of PLCC 84 and QFP 240 pins ICs. I deeply checked about their vision files and place them on the double sided tape and found them ACCURATE on their pad
Electronics Forum | Wed Apr 21 00:35:31 EDT 1999 | Scott Cook
| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185
Electronics Forum | Fri Oct 22 11:53:53 EDT 2004 | C Lampron
Hi Christina, What would you be basing the yields off of? Is it solder defect, component placement, etc....? I have worked for a flex house for quite a few years. You are right. The Polyimide is very dimentionally unstable. (even more so on humid da
Electronics Forum | Sat Sep 23 21:52:51 EDT 2017 | jlawson
In most cases PnP files are all that is needed for SMT program generation. BUT, it depends on origin reference of this data as exported to PnP and could be off in X,Y and rotation of image pending when PnP Data is exported. Also Rotation of parts
Electronics Forum | Fri Apr 03 10:29:29 EDT 2020 | stephendo
Time. The virus does not last a very long time on surfaces. Not sure how long but I read that it does not live long on copper but does last on stainless steel. As far as I know the virus lives as well on gloves as it does on hands. So you still have
Electronics Forum | Wed Jan 09 15:24:49 EST 2002 | mregalia
Thanks Chris. As I was writing my last message our mailperson dropped off the latest issue of Circuit Assembly. It has an article on mixing SMT and COB on the same board. The author recommends as a compromise 10-20 micro inches of gold over 70-100 of
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