Electronics Forum | Thu Jun 08 23:26:28 EDT 2006 | Shawn Vike
We are a small company, reletivly new to doing our own SMT (1 year) and we are having an issue, I think. We manufacture many board with no problems, but we have one that constently defeats us. This particular PCB has ENIG finish, and we have had th
Electronics Forum | Wed Jun 14 11:37:44 EDT 2006 | shawnvike
find the problem? Were the parts failing > electrically? Or did someone start prying them > and decide they were too weak? Originally found the problem going through some older assemblies that had failed testing. Poked at leads and found them no
Electronics Forum | Fri Jun 09 22:22:59 EDT 2006 | grantp
Hi, Very funny, and I feel so much better not because of your advice, but because your a Dr Dr PhD, and we all know thats more important than experience! Seriously though, so you think we should be ok with the zones we have? We are not sure, and so
Electronics Forum | Mon Jun 19 22:19:40 EDT 2006 | Nathan
Dear All, We plan to setup an assembly line for our small volume production of PCBs (about couple hundred PCBs per week). The board has about 150 components (less than 30 types) and a few BGA and IC (majority is SMT, only few THT connectors). We hav
Electronics Forum | Thu Jun 22 19:43:05 EDT 2006 | davef
We hope this meets your standards for acceptable responses. * http://www.uic.com/wcms/images2.nsf/(GraphicLib)/Time_Pressure_Dispensing.PDF/$File/Time_Pressure_Dispensing.PDF * On the Flow Rate Dynamics in Time-Pressure Dispensing Processes; X. B. C
Electronics Forum | Mon Jul 10 11:38:15 EDT 2006 | Rob
Hi Dougs, I think I'm going to have to admit to some insider knowledge here. It kind of gave it away when you mentioned there were only catalogue pages instead of specs. http://www.anglia.com/product_search/part_tracker/index.asp I think you may
Electronics Forum | Thu Sep 14 13:13:29 EDT 2006 | Kevin W. Parker
I am a tool and process engineer responsible for the cleaning system at Siemens VDO in Huntsville, AL. I have been over this area for more than 8 years. We use EMC Cyberclean 3000RF spray in air cleaners with Zestron SC202 chemistry. At this facil
Electronics Forum | Thu Aug 10 10:13:11 EDT 2006 | pjc
I have never seen any industry standards for setting up an SMT assembly facility, but I�ll offer some basic advise. An ideal SMT assembly facility is one that is clean and well lit and has environmental controls to maintain temp and RH. Temp of 24C (
Electronics Forum | Thu Aug 17 09:38:28 EDT 2006 | pjc
Having the last two zones at the reflow temp (spike) is typically done on long ovens (10 zone) running at high conveyor speeds. This enables you to achieve peak temp and TAL as per the solderpaste specs at high production rates. Concerning reverse sp
Electronics Forum | Sat Aug 26 10:28:05 EDT 2006 | Ola
Hi, this is not a solution for your o-ring "belt" problem but a guideline for the future on an o-ring "belt" (wrong word as it is Not a belt) conveyor. These crazy O-rings have a small radius which makes it somtetimes hard to do a conveyor width adju
