Electronics Forum | Wed Apr 04 19:31:57 EDT 2007 | rgduval
Dave, We're reworking with flux and solder. We're observing "exploding" joints, as well...as though something is trapped in the joints (either excess flux not burning off during solder, or residual moisture). As mentioned above, I spoke with the f
Electronics Forum | Wed May 23 08:50:29 EDT 2007 | stepheniii
We have a timer on our selective solder so it's molten when we come in. The heat it takes to remelt the solder is equal to the heat lost as it solidifies therefore don't worry that it takes more energy per minute to melt the solder than to keep it mo
Electronics Forum | Wed Jun 06 15:59:25 EDT 2007 | chrisawallace
WML, I won't dispute math but I will definitely point out either bad math or a missed target. In your example, you are comparing "Energy used to heat the solder and keep it warm" versus "Energy used to keep the solder warm" and fully discount the fa
Electronics Forum | Fri May 18 13:50:38 EDT 2007 | realchunks
Hi Grant, Replacing a wave witha spot solder? You must have very few comonents to solder or all day to solder them. Why are thinking of doing this? Well, I have looked at just about every selective machine out there. What it all boils down to is
Electronics Forum | Tue May 22 14:32:17 EDT 2007 | mefloump
The soltec Selective solder machine is great and the software is much beter than that of the wave machines. I forgot to mention that we do use nitrogen with the Selective solder machine and have wonderful results. Like I said before it does take some
Electronics Forum | Fri Jul 06 12:11:34 EDT 2007 | james
We are starting to see issues with using Kester WS R562 with lead free components. The joints look grainy on almost all of the 0402'2 and other small components. Some of the solder does not solder to the terminations. These are hybrid boards which
Electronics Forum | Tue Aug 07 19:32:40 EDT 2007 | davef
Zinc from the brass diffuses into the solder and reacts with tin causing dezincification. Dezincification is a specific type of de-alloying, or selective, leaching corrosion of brass fittings. This type of corrosion selectively removes zinc from th
