Electronics Forum | Tue Dec 05 20:22:16 EST 2000 | Dave F
Nick, what does your witness look like? Let's see if I can make me show correctly through this HTML stuff ... o o oo oo oo o o o o
Electronics Forum | Wed Dec 06 13:35:03 EST 2000 | NickMata
The witness pattern is one column formed by individual dots as well as dot pairs. The two dots which make up a pair are both side by side as well one under the other. Thanks
Electronics Forum | Wed Dec 20 07:54:13 EST 2006 | davef
We pipe a nonfunctional witness mark on every board. We inspect the witness mark. Ours consists of six pairs of dots arranged in a five-pointed star pattern. Again, consider paying attention to the cause of the problem. Your machine is NOT operat
Electronics Forum | Thu May 04 13:35:28 EDT 2017 | jmathis
Hello All, I was given an assembled flex circuit PCB and asked how the board was depanelized as there are no view-able witness marks that I can see. Any ideas? Thanks in advance on any insight to depanelizing without leaving witness marks on the F
Electronics Forum | Mon Jun 04 10:40:37 EDT 2012 | davef
I'm not aware of any such stipulation about witness [probe] marks for assembled boards, per se. Certainly, witness marks should not affect the intended performance of the assembly, you know, like damaging the solder connection or smudging solder mate
Electronics Forum | Tue Dec 05 13:34:51 EST 2000 | NickMata
Hello all, at the present I have some product onto which I glue backside components. I dispense a pattern of "witness" to use as a visual cue as to the quality of the dispensed glue dots. A problem which I have encountered is that operators will oft
Electronics Forum | Fri Nov 19 13:47:03 EST 2010 | cyber_wolf
We have witnessed capacitors falling off in wave due to mold release being present on the component.
Electronics Forum | Mon Jun 04 23:52:57 EDT 2012 | rway
Actually, if you experience lack of witness marks, you probably have a problem. Witness marks are OK and will not affect your assembly. I assume this is an SMT assembly we are talking about, in which case, this is what your test pads are for. You
Electronics Forum | Thu Apr 19 21:42:10 EDT 2001 | davef
You appear to spending too much time watching "Survivor" and too little down at Jimbo's I'm not sure "Gettin' Jiggy Wit Flux" translates well. My first recollection of jiggy is ... Will Smith "Gettin' Jiggy Wit It" Bring it. Whoo! Unh, unh, unh,
Electronics Forum | Wed Dec 06 13:47:15 EST 2000 | JAX
Nick and Dave, Did I miss the question? What does it matter what pattern the glue dots are in, whatever vision you use will have to read the individual dots anyway. If your glue machine is any good you should be able to get away with simply
