Electronics Forum | Wed Aug 24 03:17:21 EDT 2011 | richieoreilly
Hi, Thanks for the info. The current process is a standard SMT hand soldering process. The time does not include cleaning, prepping and pre-tinning. Its just the time for the re-flow of one joint itself. We are waiting on some new tips to experimen
Electronics Forum | Tue Mar 11 16:55:24 EDT 2008 | edmneb
I agree that wave soldering is probably your best method. Of course if you can, tin the wires in a solder pot before insertion into the board. The solder that would be there will probably facilitate wetting a bit better. If you absolutely have to
Electronics Forum | Thu Jan 27 14:49:53 EST 2000 | Glenn Robertson
Tuan - One of the reasons I suggested pre-tinning (aside from the negative effects of Gold on appearance and reliability) is the known slower wetting of Sn/Ag and Sn/Cu alloys as compared to Sn/Pb. If you don't have to be Lead-free, the high Lead
Electronics Forum | Fri Oct 16 14:36:11 EDT 1998 | Jeff Sanchez
| With current soldering of stranded wires to pcb assy's the wire tends to be very brittle and can break with very little movement of the wire. We use a low residue cored wire. Anybody with advice or who has seen a similar problem/knows how to overco
Electronics Forum | Wed Jun 27 13:55:10 EDT 2001 | peterson
We are having some difficulty achieving 75% fill on some through-hole power connectors. The board is very thick. Any suggestions? Our plan is to preheat extensively, pre-tin the leads and perhaps add paste in hole. Anything else that might achieve th
Electronics Forum | Wed Jan 26 14:33:47 EST 2000 | Glenn Robertson
Tuan - How about Sn/0.7Cu? It's M.P. is 227 and it's readily available. If the leads are Gold plated you might consider pre-tinning them. If you need a higher temp alloy any of the major solder companies can help - I suggets you start with Ind
Electronics Forum | Fri Dec 13 18:47:22 EST 2002 | stefwitt
In theory you are right, but the camera CCD chip has only small squares as pixels. The edges of the circle lit the pixels only by a certain percentage. In order to find the edges, you will have to use sub-pixels or greyscales. A circle is also prone
Electronics Forum | Tue Sep 22 08:35:47 EDT 2009 | cman
Did you try pre-tinning your board on this suspect pad/s to see if it improved wetting/solderability prior to printing/SMT placement and reflow? Does the pad/s not soldering tie to a ground layer? I would connect a T/C to each pad of the same part an
Electronics Forum | Tue Dec 31 10:17:12 EST 2019 | emeto
Let's stay away from the PCB and process for a while. This component is pre-tinned. What kind of solder? How is the component stored? I bet you that you can put just flux on the board and solder this part - have you tried? I think we should understan
Electronics Forum | Thu May 08 19:52:40 EDT 2014 | hegemon
There are many different style LGA packages, but don't sweat it. Stick with the manufacturers recommendations for PWB pad geometry for a start. Voiding can be reduced by careful profiling, and also by pre-tinning the devices. QFN style packages can b
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