Electronics Forum | Wed Mar 23 05:17:23 EDT 2011 | arwankhoiruddin
Hi All. I want to know what is the IPC/JEDEC standard for solder paste printing defects. From the brochures of SPI Machines, the recognized defects are excessive, insufficient, misalignment, no solder, bridging, and solder shape error. What document
Electronics Forum | Wed May 29 08:43:12 EDT 2002 | zanolli
Various solder metal supplies sell pre-forms as loose individual shapes, usually donuts. The loose performs then are placed on the connector leads. If you have any volume at all, you would want to look at a �shake table� that would vibrate a batch of
Electronics Forum | Wed Mar 28 13:14:38 EDT 2007 | amelara98
I am having problems with a product we receive from our overseas plant, where there is excessive "dullness" of solder joints/metal surfaces after running a board on a pallet through wave solder. Seems to be an issue of the pallet, as the solder appe
Electronics Forum | Tue Jul 17 15:13:53 EDT 2001 | mparker
Dave - I agree that the U shape for QFP's sounds a bit whacked, for the reasons you state. It may work OK for larger pitchs but then again there are a myriad of fixes that work before resorting to U shapes. With the U shape removing paste from under
Electronics Forum | Tue Jun 04 20:34:28 EDT 2002 | russ
Jason, Excessive thermal ramp rates, misprints, improper pad design, paste type, placement pressure, all can cause solderballs. Do the pads on this board meet IPC 782 criterias? I have found that too much pad underneath component can cause this. A
Electronics Forum | Thu Nov 14 03:12:42 EST 2019 | jefri_simorangkir
hi Team, observed excess solder after assembly jumper with manual solder method. I already try to duplicate the phenomenon with adding more solder tin/wire,adding more time for solder but not found same condition I have attached the image for the
Electronics Forum | Thu Nov 21 19:55:38 EST 2019 | myke03o
Would like to know what type of soldering iron you are using. On this type of big jumpers, a continuous heating soldering Iron will do the job nicely in order to heat the jumper wire properly.
Electronics Forum | Thu Apr 26 19:06:08 EDT 2007 | grayman
In short this guys are not well updated on the new technology of SPI. True, 3D IN LINE SPI is no longer a slow machine. Try checking some brand like Cyberoptics,Synapse imaging,SEIMENS,KOHYOUNG and many others...they can match the speed os some mount
Electronics Forum | Sun Nov 08 08:58:55 EST 2009 | aliabdul77
Instead of you spend money on AOI,my recomendation will be to install SPI machine ( solder paste inspection machine)since most of your defect are solderability issues.AOI only will ensure no escapee to backend/human escapee but SPI will help to to en
Electronics Forum | Sun Nov 08 09:00:49 EST 2009 | aliabdul77
Instead of you spend money on AOI,my recomendation will be to install SPI machine ( solder paste inspection machine)since most of your defect are solderability issues.AOI only will ensure no escapee to backend/human escapee but SPI will help to to en
