Electronics Forum | Tue Apr 03 05:46:35 EDT 2007 | chrissieneale
OK - going to set up some measurements so we can see how big this problem is. I've got the following so far... Number of boards pasted per employee per shift Number of hand placed parts per employee per shift Number of people per shift Time pasting
Electronics Forum | Thu Oct 11 16:26:40 EDT 2007 | jseagle
Have you created block offsets for each board in the panel? We have rotated baords in panels but have not had to use block fiducials, we just use board fids. We place 0402s and 16mil fine pitch on multiple boards in a panel with boards rotated 180
Electronics Forum | Tue Apr 03 03:31:51 EDT 2007 | chrissieneale
Apparently because the machines are old and prone to break down they do all the printing for the day (maybe 6/7 different board types) up front. This doesn't make any sense to me - if the machine is going to break down, the machine is going to brea
Electronics Forum | Fri Oct 12 13:10:27 EDT 2007 | jseagle
We always do block conversion and have never had a problem. Is there a problem with the accuracy of your PCBs from the vendor? If you can get a panel placed correctly the next panels should also place correctly. I just created a 2x8 panel with hal
Electronics Forum | Wed Jul 04 12:18:14 EDT 2012 | davef
Phil is correct in his description of proper rework technique. Possible explanations of the reason for popping of your BGA are: * Thermal cycling of components cause them to flex on a different point in the cycle that the board possibly resulting in
Electronics Forum | Thu Oct 11 16:55:26 EDT 2007 | slthomas
Yeah, James, we've got block repeats set up so we're getting the boards built with just pcb fids, and very accurately. I want to be able to build with block fids, though, in case we have any issues with the panelization. It's happened in the past a
Electronics Forum | Thu Oct 11 17:54:21 EDT 2007 | slthomas
Yep, we did it just the way you described, I think. What we did NOT do was a block conversion. We just built it a board at a time, to see if things were accurate when we first programmed it. They weren't, so we did away with the block fids, adjusted
Electronics Forum | Mon Apr 02 12:04:23 EDT 2007 | realchunks
Are you running different baords/product at the same time? Why are they buffering boards after screen print?
Electronics Forum | Tue Jul 03 02:42:37 EDT 2012 | kq702
Hi I did a reflow on an HP laptop a while back- it was a DV6000 series. The original problem was the internet stopped working- turns out the south bridge chipset was causing the issue (its a very common issue I found out after searching online). Some
Electronics Forum | Mon Apr 02 09:42:51 EDT 2007 | chrissieneale
Quick question for anyone - With this whole pasting and waiting thing - i've found out that the board is pasted, it sits around for a bit, then the components get placed on it. Then i thought it went into the oven BUT, it doesn't. It sits for a few
