Electronics Forum | Thu Apr 05 08:59:43 EDT 2007 | rgduval
Dave, I've seen some instances of solder as you mentioned "painted" over the joint. Almost looks like a seam between the added solder and the originally waved on solder. Typically, I've seen that in the past from an incomplete solder joint. One w
Electronics Forum | Thu Apr 05 09:18:14 EDT 2007 | pjc
Please note that pin holes and blow holes are not always defects. The latest IPC 610A Rev D workmanship standard has them as process indicators- depending on Class. I don't have the document handly while writing this. It would be good to look that up
Electronics Forum | Thu Apr 05 13:40:15 EDT 2007 | slthomas
"I just need better reasons than it [...] increases defect probability." If that's not enough, you have bigger problems. Have you seen any rework/repair that was generated by this handling gem? Does your company profess to build to IPC specificati
Electronics Forum | Sat Apr 07 01:15:45 EDT 2007 | Haris
Hi I dont think there is a stencil problem or a printing one but i think you should check you paste specification regarding 20 mil pitch i.e. its ball size in microns so that you know Is that paste can be use for this type of components or not. Secon
Electronics Forum | Tue Apr 10 14:35:52 EDT 2007 | UT
We are in middle to prototyping a lead free assembly for one of our customers. We are using lead free bare PCBs, consumables and components, except for two ICs which are leaded per the customer BOM. Will the overall assembly be defined as lead free p
Electronics Forum | Tue Apr 10 17:44:50 EDT 2007 | Anon Y. Mous - Senior SMT Superczar and Process Guy
One of our customers had us building "Pb-free" assemblies with a few Sn/Pb parts on them. THEY got rolling too slowly and we were not able to bring in the required Pb-free components due to lead-time (not Pb-time) issues. When they started requesti
Electronics Forum | Wed Apr 11 08:36:23 EDT 2007 | davef
IPC-A-610D refers to 'toe down configuration' several times, beyond the 8.2.5.6 that you question. Although none will add to your understanding of 'toe down'. A lead that is 'toe down' is one where the foot of the lead is not parallel to the pad. T
Electronics Forum | Thu Apr 12 00:25:25 EDT 2007 | raychamp007
Thanks davef! We found some SOIC & QFP with all leads having toe down problem. The heel fillet unable extend to the mid point outside bend. Do you have solutions for the problem? I have a question: How about the normal gull wing lead which is flat &
Electronics Forum | Thu Sep 06 05:14:30 EDT 2007 | jola
Thanks for your reply! Have you tested the torque meter yourself? I have asked our supplyer if they had any but the answer I got was that they should check with Fuji, and that semes to be a slow process... We do mouthly mainteness on our highspeed fe
Electronics Forum | Wed Apr 11 14:57:31 EDT 2007 | itwasbill
Hi all! We are placing BGA's using a QSV-1 pck and place machine. I believe our profile has the correct information but we continue to get vision results not available when we inspect the part. Our screen appears as follows: NO RESULTS AVAILABLE PAR
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