Electronics Forum | Thu Mar 31 20:16:31 EDT 2011 | tkirk
We recently decided to try using a different source for our bare boards to save money. On two different batches of PCBs now from the new source, we are seeing beading including some serious enough to short out underneath 0805 parts. We have never re
Electronics Forum | Thu Apr 21 20:23:57 EDT 2011 | sarason
My shareware program will generate a TPSys program from a Protel file, any thing from Autotrax to Altium Designer. You can download it from http://users.tpg.com.au/sarason/index.html The TPSys option is entered on the second tab dialog "Option" un
Electronics Forum | Wed Jun 08 01:45:53 EDT 2011 | aoiguy
Update: I was able to import the csv pick & place data that was given, issue is that the data fails to over write the insert cords that have already been given with the cad data. Can not load the csv data without the first (cad) file loaded, so there
Electronics Forum | Fri Jul 22 18:22:36 EDT 2011 | garym4569
We have a inline YesTech YTV-2000 in a newly configured SMT line and having issues with the transfer system. Shortly after the unit is put in run mode, the conveyor will turn on and run as if it is attempting to load a pcb even though no pcb availab
Electronics Forum | Thu Jul 28 07:23:24 EDT 2011 | scottp
My group supports a couple hundred lines all over the world. Most of them use squeegees but a few use either the MPM Rheometric pump heads or the DEK Proflow heads. I absolutely hate the enclosed heads. Flux separation, compaction, and the print q
Electronics Forum | Mon Aug 22 10:15:30 EDT 2011 | davidalvarez
we have never had a problem using no-clean flux as far as far as shorts and testing problems, using high pressure test probes helps overcome this. The problem we have had is if a unit comes back down the line a couple of years later we notice that t
Electronics Forum | Wed Sep 21 14:43:50 EDT 2011 | russw
The confusing thing is we are doing the same thing we've been doing for years, same flux levels, same procedures, etc. so you would expect the same results. The only difference is the new bottle of 951, but Kester insists there isn't a problem with
Electronics Forum | Mon Nov 21 10:51:12 EST 2011 | scottp
I've never seen a good article with a definitive explanation - just speculation that the increased wetting forces due to nitrogen result in increased tombstones. My own experience is that nitrogen is a very minor contributor to tombstones and can pr
Electronics Forum | Fri Feb 03 09:50:37 EST 2012 | mosborne1
Thanks very much everyone. > > I'll try out a > 5mil and see how that goes. If you are using 6mil stencil and you are saying that you need more on the 0603 parts then you might want to look at your squeege pressure. What kind of squeege blades ar
Electronics Forum | Fri Mar 09 15:13:49 EST 2012 | davef
Care must be taken to not apply an excess of material, as the adhesive will flow under the device during placement and curing, and could cause a short. Printer setup: * Don't worry about stencil thickness. A wide range of stencil thicknesses (typic
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