Electronics Forum | Fri Jun 10 13:04:04 EDT 2011 | spitkis2
Any suggestions as to what can cause a PBGA's corner to warp down during installation process on a rework system? A couple solder balls bridge at the corner. It appears at the pin 1 corner where the metal indicator of a BGA is exposed. I am wonder
Electronics Forum | Tue Jun 14 17:32:44 EDT 2011 | davef
It depends on the flux and the down-stream processing ... * If there is adequate down-stream cleaning: We are ambivalent. * If the flux is low residue and there in no down-stream cleaning: We don't like using a syringe because it squirts liquid flux
Electronics Forum | Fri Jul 08 12:45:10 EDT 2011 | markhoch
It's a $40 adder to my stencils if I have them apply it. But I've just discovered that if you have THEM add it, they add it thru a stencil and only apply it to the appertures. (My guess is they do this because it allows them to use much less material
Electronics Forum | Thu Jul 21 19:53:20 EDT 2011 | isd_jwendell
Using AIM N.C. paste, just ran 10 panels to test after applying Rain-X to the stencil (pre-clean with IPA). Printing and release were slightly better (maybe my imagination), but not a large difference. Stencil remained cleaner longer. I could not tel
Electronics Forum | Fri Jun 24 15:04:22 EDT 2011 | kahrpr
I am going to open the flood gates of comments. The purpose of no clean is so you do not have to clean it. Yes I am aware of no cleans that you can clean. If you need to clean the boards use a water soluble paste. If you do not clean, no clean prop
Electronics Forum | dilogic |
Mon Jun 27 14:27:47 EDT 2011
Electronics Forum | Fri Jul 08 15:19:56 EDT 2011 | markhoch
Your images are depicting signs of voiding. Some voiding is common. In an assembly like this, I would concentrate on minimizing the voiding as much as possible, and then using that as your baseline. I'd then treat the voiding as a process indicator.
Electronics Forum | Thu Jul 28 19:08:05 EDT 2011 | garym4569
Right now we are mainly using it in bypass mode until we can program our new inspection recipes. We also tried setting a quick inspection program just to see if bypass mode was not working correctly. Still will not handle pcb transfer correctly. I
Electronics Forum | Thu Jul 28 21:32:06 EDT 2011 | rway
We are using 2.7.7. I have two M1 systems, but the sw is the same. I am not at work at the moment, but I will look tomorrow and let you know. On a side note, the conveyor will run continuously when in bypass mode. It does sound like you have a tra
Electronics Forum | Wed Aug 03 10:09:27 EDT 2011 | geb
Our Samsung CP45FV Neo is out of warranty, but due for its annual calibration/ service, however we are wondering whether it is really needed. The line only runs for 8 hours a day 5 days per week (including setup), so not heavy usage. The manual does
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