Electronics Forum | Thu Jul 20 08:52:10 EDT 2006 | Chunks
Is there silk screen on the pads? Other than that I would look for what has recently changed. Running smooth for a year and now all the sudden a problem. New microscopes always seem to do this trick as well. Amazing all the "defects" one can fi
Electronics Forum | Fri Dec 29 12:46:24 EST 2006 | realchunks
Crappy piles? Weren't they a hard rock band in the 80's? I know on most of our boards the little silk screen dot is just the component identifier in really small font when looked at in Gerber. But this dot isn't very big, so I see how it can affec
Electronics Forum | Mon Feb 25 12:21:16 EST 2008 | stevek
Rather than having the artwork cover the via as with tenting dry film, and letting the mask do what it will, the preferred way is to do a second op silk screen with something like SR1000 just in the vias themselves to plug them. This doesn't always
Electronics Forum | Fri Jun 04 11:32:50 EDT 2021 | stephendo
What about the bar code reader? The ability of them vary a lot. One machine had problems reading clearly printed barcodes. But after new software it would read them well. And later we got boards with the datamatrix barcodes silk screened on. They we
Electronics Forum | Mon Jul 26 20:40:48 EDT 2021 | stephendo
Software makes a huge difference. Try a different barcode reader app and see if you can find a better one. With data matrix the bar code can be mostly a bunch of blobs as long as the outside is reasonable good. Then the reader only needs a few pixels
Electronics Forum | Tue May 28 21:00:59 EDT 2002 | davef
That is the rub here, isn�t it? For those posting, it�s easier [but much slower] to start a new thread than to search the archives. [And posters could view their issue so unique and novel that it could never have been discussed several years earlie
Electronics Forum | Thu Feb 14 23:37:38 EST 2008 | operator
That is bizarre. I would have to say that you need to do a test on the PCB to test solderability with an iron like mentioned before. If you don't find that the pads are contaminated or masked over lightly and the pads do take solder effortlessly, you
Electronics Forum | Mon Jan 15 20:03:09 EST 2024 | griinder
Does anyone have experience of using a stainless Fine Grain SMT stencil for the purposes of applying ink to bare PCB's? We are exploring the possibility of getting a stencil to apply a letter that reflects the revision to each of 25 PCB's in a panel.
Electronics Forum | Mon Dec 10 13:23:51 EST 2012 | ericrr
Thank you ENIAC for your input. The engineer who did the PCB says all his figures are correct. I over came the problem by moving the X coordinateness of the 2nd BOC mark (top left on the picture) over just slightly in the file (measured by the dis
Electronics Forum | Tue Feb 23 21:33:22 EST 2021 | stephendo
We haven't laser engraved PCBs but we have had 2D barcodes silk screened on. When I saw them I thought that they would not work because the white squares were blobs but they did work. With the Datamatrix format only the centre of each little square
