Electronics Forum | Wed Aug 11 13:34:58 EDT 1999 | Dave F
(snip) | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little later on. It has
Electronics Forum | Wed Aug 11 09:51:11 EDT 1999 | Brian
| | | Easy goods-in polymerisation check: clean, white, cotton cloth: wrap it round a suitably gloved finger and pour a few drops of methylene chloride (! toxic) onto the end of the finger and rub it onto the bare board for a minute or so. If it come
Electronics Forum | Tue Jun 07 08:31:57 EDT 2011 | bootstrap
I am building a rugged digital video camera product that essentially is just a sandwitch of 3 parts: #1: front piece is machined aluminum with C-mount thread #2: middle piece is 1/16" printed circuit board #3: back piece is machined aluminum The
Electronics Forum | Thu Aug 12 05:33:23 EDT 1999 | Brian
| | (snip) | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little later on
Electronics Forum | Thu Aug 12 22:23:23 EDT 1999 | Dave F
| | | | (snip) | | | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little
Electronics Forum | Fri Aug 13 10:39:25 EDT 1999 | Boca
| | | | | | (snip) | | | | | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a
Electronics Forum | Sun Nov 08 10:22:52 EST 2009 | doremi
Hi everybody, First of all, to have process under 100% control you should have AOI after every active process in the pcb assembly line : - Post printing (2D or 3D Solder paste inspection machine); - Post reflow; - Post selective(wave solder). It i
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 08:05:25 EDT 2009 | patrickbruneel
Deni, You also need to check if your flux is properly wetting the board. Flux dewetting on the surface can also cause webbing. You can check that with spraying flux on the board surface and watch the wetting behavior. Patrick
Electronics Forum | Fri Jul 31 02:59:52 EDT 2009 | dj_jago
I can't open the picture but if it is webbing and you are running with an alcohol based flux (non VOC free) another thing to check is the Specific Gravity.
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