Electronics Forum | Thu Sep 10 15:10:12 EDT 2009 | mefloump
This has some good iinformation for wave solder defects... http://www.trafalgar2.com/troubleshooter/wave_soldering.htm
Electronics Forum | Fri Aug 28 06:39:29 EDT 2009 | sachu_70
I had seen such effect caused by the wave itself, where the exposed wave surface was coated by a thin dull oxide layer which then adhered to the bottom side of PCB during wave soldering. You could verify if the wave surface is clean metal when the P
Electronics Forum | Wed Jul 29 03:32:57 EDT 2009 | dilogic
We recently started to use wave-soldering. As total newbies in that field, we got successful results most of the time. Howewer, this batch of PCB's had a lot of resdiue, as shown on the picture. Most of it is most likely flux, but on some areas even
Electronics Forum | Tue Aug 04 17:17:17 EDT 2009 | gregoryyork
Certainly does look like solder deposit across the board. Check to see if fluxing correctly. Best way is to hand flux the PCB ensuring you put plenty on. IF you still get the same result then probably down to resist absorbing the flux due to porous r
Electronics Forum | Wed Jul 29 07:06:44 EDT 2009 | patrickbruneel
Deni, This looks more like webbing and not flux residue. Webbing is caused by not enough flux to protect the surface resulting in oxide webs sticking to the board surface. The insufficient flux can be caused by: - Weak flux foam head - Air knife p
Electronics Forum | Wed Jul 29 07:45:37 EDT 2009 | patrickbruneel
Deni, When using a no-clean flux preheating is a critical parameter. If you don’t have a thermo profiler you can use inexpensive temp. labels See link http://www.coleparmer.com/catalog/product_view.asp?sku=0806822 or Google Temperature labels If i
Electronics Forum | Wed Jul 29 07:26:12 EDT 2009 | dilogic
Hi Patrick, thanks for the response. I might add some more information - we succesfully soldered some boards with the same settings of belt speed, pre-heat temp. etc. This batch of boards differs from the previous in a way that they are 4-layer. May
Electronics Forum | Thu Oct 12 17:56:58 EDT 2000 | DennisF
The white residue can be caused by putting Alcohol on the no clean product. Some people will attempt to clean an area they have reworked.
Electronics Forum | Fri Oct 13 15:16:43 EDT 2000 | Dave F
George and the others make good points. Check Les Hymes response to a similar question in 7/00 "Circuits Assembly"
Electronics Forum | Tue Jul 02 12:33:32 EDT 2002 | Mike Konrad
We have had success removing white residue. A change of chemical (PCB-Wash or Vigon A200) have a good track record in removing white residue. As Dave stated, we (and others) operate a contract cleaning service. Contact me offline and I�ll provide
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