Electronics Forum | Tue Feb 01 06:54:19 EST 2000 | Roni H.
Hi, Does anyone have experience with gold over nickel (electroless) PCB finish: - Repeatble quality from PCB mfg. (very "painfull" with ENTEK). - Environment condition sensitivity. - Thermal processes sensitivity. - Solderability (Reflow & wave). -
Electronics Forum | Wed Feb 02 09:58:00 EST 2000 | Dave
Ashok, I don't understand what they're saying about the gray joint. Usually a gray joint has to do with too much heat. Also, the higher the temperature the lower the fillet because of the increased viscosity of the solder. Correct? Wouldn't yo
Electronics Forum | Mon Jan 31 12:15:32 EST 2000 | Neil
I am looking for a Mydata users group, one possibly located in the Chicago area. If such a group does not exist, I would be more than happy to help start one. I have an older Mydata TP9 (non-UNIX) machine, with weak (yet expensive) support from the m
Electronics Forum | Wed Feb 02 17:16:44 EST 2000 | Larry
Boca, We mix them with titanium fingers, been running them for 6 months with no problems with heat. They break off rather then mangle like the titaniums, which can be a good thing! Do I like them? Sure! I found they were 1/2 the price as titaniums an
Electronics Forum | Sat Jan 29 00:30:09 EST 2000 | Micah Newcomb
Mike, I found the easiest way around your issue is to get your parts in T&R rather then trying to modify your machine. Some part manufacturers may be unwilling to T&R your part but there is always a ready and willing company whom would be happy to d
Electronics Forum | Sat Jan 29 02:30:14 EST 2000 | Dean
5K$. Of course I remind myself that when these machines were designed BGA's didn't exist. I had no choice but to purchase this option as a new machine was out of the question and I place around 15,000 BGA's per month on this line. So the ROI was v
Electronics Forum | Fri Jan 28 05:06:01 EST 2000 | Istv�n Dominik
Hi! I have problems with the SMD boards during wave soldering. Mainly between the pins of the SOICs there are small solder balls. Maybe somebody had the same problem and could solve it. Please give me some ideas what causes this problem and how it
Electronics Forum | Fri Jan 28 10:09:50 EST 2000 | mike d
Istvan, One possible reason for this is that you are using a water soluble flux in your wave solder machine. If you are and the boards are not pre heated long enough, the water in the flux does not evaporate before hitting the wave. When the water
Electronics Forum | Sun Jan 30 03:06:50 EST 2000 | Roni H.
Hi, The major reason is that the flux is still "wet", you should fix the temp. profile (specialy preheat zone) so the evaporation of flux carriers will be better (anyway not to much !). Recommended: 1st preheat zone heating to ~70C , 2nd&3rd prehea
Electronics Forum | Wed Jan 26 17:02:22 EST 2000 | Morris
One thing I've found that will create that white residue is when moisture comes in contact with that flux. 1. Verify that you are not introducing any moisture with the compressed air supply at the foam fluxer. 2. Replace the flux and clean the flu
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