Electronics Forum | Thu Apr 26 16:36:35 EDT 2012 | davef
Stencil Cleaning [AIM LeadFree] * Stencils should be cleaned frequently enough to ensure total removal of any bottom side residues, but not so infrequently as to allow the same residues to dry or cake on, making their removal much more difficult. * S
Electronics Forum | Wed May 09 13:19:53 EDT 2012 | markhoch
I'm with Dave on this one. In my opinion, it'd be much more cost effective to add an alignment legend. Speaking from experience, as I've hand placed many BGA's, all you really need to do is hit the pads. Even with Pb Free Chemistries, the part should
Electronics Forum | Fri May 11 10:59:39 EDT 2012 | 14367
Thank very much for the feedback. I was asked why mixing the paste was not a good idea. Could you provide the answer please? It's always better to hear from an outside expert:) The SOT23 - some of them have actually flipped upside down ; plus we hav
Electronics Forum | Tue May 15 13:08:53 EDT 2012 | deanm
Dittos from A Very Frazzled Man. Money spent on a better process is almost always more advantageous than better inspection. As for manual TH insertion, have you considered a semi-automatic machine like the Contact Systems CS-400? While the "E" serie
Electronics Forum | Mon May 14 13:20:22 EDT 2012 | kahrpr
first I am personally not a fan of dross reducers. We have enough issues with contaminants on boards (high impedance analog) so i do not want to introduce more contaminants into the process. Second I have not had much luck with any dross reducers. We
Electronics Forum | Wed May 23 13:32:01 EDT 2012 | rrpowers
There is also a good reference book on flexible circuits from Joe Fjelstad. http://flexiblecircuittechnology.com/flex4/ This book covers everything from creating the flex circuitry itself to the assembly of flex circuits. Also, roll-to-roll assemb
Electronics Forum | Mon Jun 04 16:27:55 EDT 2012 | jorge_quijano
Hello there, I just want to ask you how often do you take your profiles on the Reflow Oven and Wave solder? I have a HMLV line running 5-6 products per shift (Reflow Oven & WS) my tech spend too much time checking the profile, but no major difference
Electronics Forum | Wed Jun 06 21:58:39 EDT 2012 | davef
Higher temperatures are the primary reason that there are more solder balls with selective soldering than in wave soldering. Possible causes are: * Solder mask type is the most important factor ... Solder resists becomes stickier at higher temperatur
Electronics Forum | Sun Jul 15 21:00:37 EDT 2012 | sarason
Try using the accounting functions in my program PCB Synergy. http://members.iinet.net.au/~sarason/ It can calculate the number if components used in a run by simply importing the PCB or the schematic or a PIK file. It generates CSV which has the num
Electronics Forum | Mon Jul 30 16:26:45 EDT 2012 | rdouglass
Just curious if anyone else has trouble with the installation and inspection of DIMM Connectors (I know - these are through-hole parts!) We have boards with 240 pin DIMM connectors and occasionally a pin may not be properly aligned prior to press-f
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