Electronics Forum | Fri Feb 01 10:54:35 EST 2013 | dyoungquist
Regardless of the surface finish, you should try to limit the reflow cycles to 3 with no more than 5 at most. This includes reworking a BGA site as well. Remember that heating/cooling to remove a BGA is one cycle and heating/cooling to place a BGA b
Electronics Forum | Thu Feb 07 13:53:38 EST 2013 | hegemon
I would consider wave solder as a cycle, in that for the most part the entire board is subject to the wave. Selective Solder is a gray area in that regard, since you will be hitting one or more locations, that in total do not comprise a large percen
Electronics Forum | Mon Apr 01 20:40:49 EDT 2013 | aemery
Quite sure it is one of the follow things. Squeegees are not tall enough (using after market blades); Are you using a stencil adapter? bottom surface of the stencil must be even with the top of the stencil shelves; printhead assy. is modified, faile
Electronics Forum | Wed Mar 20 07:14:10 EDT 2013 | vinitverma
Assembleon AX201 is one of the most accurate odd-form placer. It can place anything, including leaded transformers, press-fit connectors, and of course odd form SMT components. You can even use a gripper nozzle for components without a flat surface t
Electronics Forum | Tue Apr 23 15:35:45 EDT 2013 | dyoungquist
Check out IPC-A-600. Revision G (July 2004) section 3.2.3 (surface) and section 3.2.4 (internal) give min/max thicknesses for various weight copper. The min also changes depending on what class (1-3) standard you are working to.
Electronics Forum | Mon Jul 15 12:52:34 EDT 2013 | i9300
Hi, Does anyone know what this component is, and where i can order some replacements? It's a surface mount power connection, I need the female and male replacements, end-to-end it's about 5mm, with three gold contacts, each 1mm or so apart. Thank
Electronics Forum | Mon Jul 22 15:02:31 EDT 2013 | dyoungquist
What is the pad surface finish on these boards? I know OSP and silver finishes have a shorter shelf life than HASL or gold. We do not use OSP or silver on our boards so I don't know what to look for visually on the pads when they have exceeded the
Electronics Forum | Wed Jul 31 18:26:09 EDT 2013 | Jeff Kennedy
You might consider to contact a lab to Run a microindenter against a know good soft gold sample. The knoop value for the soft gold will be much lower than for hard gold. This would be reflected in the diameter measurement of the indented samples.Smal
Electronics Forum | Wed Aug 07 16:06:26 EDT 2013 | rway
What type of filtering are you using? Your solder inspection should be using Histogram Inspection as the Decision and red filter for preprocess. Make sure your settings are correct and check your binarized image under Histogram setup. you should s
Electronics Forum | Wed Aug 07 16:33:08 EDT 2013 | rway
I did not see the histogram image (didn't scroll down). My point about the flat metal surfaces is they should have a large white total under top-light with red filter. You should be able to distinguish between the two (fillets and no fillets). I k
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