Electronics Forum | Fri Apr 08 09:33:32 EDT 2005 | Dave G
We put the following on our travelers: Finished Assembly Part # Date Started (@ Bottom SMT) Date Finished (@ Top SMT) SMT Inspection -- Just a checkbox Postwave Inspection -- Just a Checkbox Board Wash -- Just a Checkbox Solderpaste Date Code & Type
Electronics Forum | Sun Apr 03 00:22:50 EST 2005 | Haran
We have received a board from our customer with one of the Transformer falling off.The component lead plating fell off but there is solder fillet at the PCB pad is good.
Electronics Forum | Mon Apr 04 09:30:49 EDT 2005 | russ
Andrew, we need a lot more information to help. 1. what is the open caused from? bemt pins, non-wetting, board bowing, or no paste deposited. 2. What is your current stencil design? 3. What does this connector look like and what are the pins? Rus
Electronics Forum | Mon Apr 04 08:35:08 EDT 2005 | py (france)
how to replace a qfn on a board , and how to weld it ? special stencil solder cream and as a BGA ?
Electronics Forum | Mon Apr 04 08:45:42 EDT 2005 | jimih280
how does polyurethane used for wood floor coating differ from urethane conformal coatings sold for circuit boards? where can i get uv tracer to put in oil based urethane?
Electronics Forum | Mon Apr 04 13:06:01 EDT 2005 | davef
Here you go: * Wood sealing http://www.paintdocs.com/webmsds/webPDF.jsp?SITEID=DURA∏no=86300000&doctype=MSDS〈=E * Board sealing http://www.mgchemicals.com/msds/english/liquid/4223.pdf
Electronics Forum | Tue Apr 05 12:45:01 EDT 2005 | cyber_wolf
Make sure your matrix tray is up high enough. The components in the matrix tray should be at least at board level. Also check your component height in the package list. If all that is OK then, check those Z locks I spoke of earlier.
Electronics Forum | Tue Apr 12 03:42:49 EDT 2005 | Rob
Hi SMTUser, I've never personally tried it, but one of my customers builds hybrids & low volume very complex boards & gets very good results using GSM1's placing 0201's using the aforementioned set up.
Electronics Forum | Fri Apr 08 19:55:48 EDT 2005 | Dhanish
The problem is IPC spec. calls for 7 mils/inch but my equipment spec. calls for Warpage as 40 mils.Our Equipment folks saying if a board warps more than 40 mils ,there will be placement issue.
Electronics Forum | Tue Apr 12 04:35:30 EDT 2005 | dusty
How can I do paste printing and placement set-up without having to waste a panel?
