Electronics Forum | Wed May 15 22:23:38 EDT 2002 | ianchan
Hi mates, need some help to resolve a thumb-twine situation. As a high-mix, low volume prototype build house, we always conduct a first article inspection (FAI) on every model setup conversion in the SMT production Lot run. we do this FAI by mounti
Electronics Forum | Tue Aug 24 05:11:32 EDT 1999 | George Verboven
| | Hello everyone, | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in advance. | |
Electronics Forum | Tue Dec 07 14:21:41 EST 1999 | Brian W.
In my experience, the most commonly accepted theory is that 100% inspection is only 80% effective AT BEST. That means that if your inspoectors are happy, noy outside concerns, well-rested, etc, they will catch 80% of the defects. This number goes d
Electronics Forum | Wed May 19 14:09:29 EDT 1999 | JohnW
Wendy, I've done this before using a machined piece of FR4 material to hold the board (machined like a DEK plate )in place at the press . It ensures that the boards are alway's in the right place and that none of the components are damaged..also sto
Electronics Forum | Tue Aug 24 06:40:18 EDT 1999 | Gyver
| | | Hello everyone, | | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in advance. |
Electronics Forum | Tue Aug 24 11:36:37 EDT 1999 | Jimmy G
| | | | Hello everyone, | | | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in advanc
Electronics Forum | Sat Aug 07 11:47:47 EDT 1999 | JohnW
| | | | | | | | | | | | Hello, | | | If you are using no-clean and they are entrapped in the flux it is also IPC accepted but i havent found a customer yet who agrees with that. Im sure you have checked your profile. I had the same problem with chi
Electronics Forum | Wed May 19 14:58:31 EDT 1999 | Wendy Casker
John, Thanks for the advice. I spoke with some of the connector suppliers apps guys today and they have what is called "European" style tooling which consists of top and bottom tooling. The board sits on rails and the Bottom tooling receives the pi
Electronics Forum | Fri May 21 15:51:49 EDT 1999 | JohnW
Wendy.. I found that little nugget a good one from my connector suppliers..Oh we have a tool to put it in for u..only catch was the one I needed was �37K ! ! after falling off my seat I went for something like what I described blow..cost about �1K.
Electronics Forum | Wed May 26 15:56:08 EDT 1999 | Chrys Shea
| | | we have just started wave soldering passive SMT components and through hole. We are having trouble with voids on the SMT components. It is very random, but effects a lot of TSOT's. We are using an electrovert with a chip wave. Are there any
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