Electronics Forum | Mon Oct 02 17:33:24 EDT 2006 | russ
nope it will not, I am sure that an FR-4 board has been wave soldered sometime in history Russ
Electronics Forum | Mon Aug 13 10:39:35 EDT 2007 | dphilbrick
If you can not find the source of cotamination then apply masking to fingers until you do find source, single layer of Kapton tape or similar should not affect print thichness. This will eliminate scrap / rework in the mean time.
Electronics Forum | Fri Nov 02 06:16:15 EDT 2007 | bbarton
400mm/s??? I want to know what solder you are using AND what machine?
Electronics Forum | Mon Nov 26 13:09:20 EST 2007 | realchunks
Even a slight amount of epoxy will prevent a part from soldering. Look at the part after print. If you any trace of you epoxy between the pad and part, you have a potential problem.
Electronics Forum | Tue Nov 27 07:51:21 EST 2007 | shy
is there any gap between the pad and terminal if we place the glue? Btw, my practice to print solder pate then punch glue then PNP component and finally reflow. Also we find drop/missing chip after wave eventhough we glue the component.
Electronics Forum | Thu Oct 16 10:17:51 EDT 2008 | kevslatvin
I'd start by looking at the available tips from the manufacturer of the iron you are using. They usually have a selection of specialty tips in their catalog either online or in print.
Electronics Forum | Thu Aug 20 13:01:40 EDT 2009 | bman
When I've seen white strands in the solder on SMT boards, it's been fibers from stencil wipes that stuck to the stencil, then transfered to the board when it was printed. I'm not sure why this would only happen with fine pitch components though.
Electronics Forum | Mon Sep 21 23:42:15 EDT 2009 | dontfeedphils
Anytime we use a glue/wave solder process we print the adhesive using a stencil and our screen printer and we have excelent results. It is in no way a difficult process.
Electronics Forum | Thu Jul 07 08:21:27 EDT 2011 | scottp
I don't understand the long lead times comment. You should be able to get stencils next day.
Electronics Forum | Fri Jul 08 15:23:30 EDT 2011 | markhoch
Maybe they are buying them from a guy who cuts them with a dull chisel and a rock. Cuz that could take a while depending on aperture count. (I'mjustsayin)
