Electronics Forum | Thu Apr 15 15:54:13 EDT 2004 | pjc
You ned to speak with an apps engineer from a paste supplier that can go through their alloys. I know Indium has such alloys. Any vendor should be able to supply you a list of alloys avbl in NC paste with their liquidous points.
Electronics Forum | Thu Apr 15 20:48:57 EDT 2004 | Ken
Tin antimony mp = 236-240C 80Au / 20SN mp = 280C sn25 Ag10 sb = 365C There are very few high temperature service alloys. how about filling a 1400lb pot with 80% Gold! What is the application?
Electronics Forum | Thu Apr 15 16:37:15 EDT 2004 | wgaffubar
I agree with the loose parts but you can also put a O-scope where the encoder output goes into the computer to see if the signal has a lot of noise. A noisy signal can sometimes fool the input card into thinking the encoder pulses are ok.
Electronics Forum | Thu Apr 15 08:23:47 EDT 2004 | prod
hi, Having put a copper socket trough a wave soldering machine, and then through a DI wash, the boards have been dried and after a few days a green residue has been noticed on the copper. any suggestions? not drying properly maybe? or could it be th
Electronics Forum | Thu Apr 15 17:48:15 EDT 2004 | davef
When we see dewetted solder on pads, we sprint to get sections done, in order to determine if over-exuberant pumice scrubbing by the fabricator has buried material in the copper.
Electronics Forum | Mon Apr 19 14:24:50 EDT 2004 | Debi
i hope that this forum read people who have possibility work with Microflex and DEK 248 and i want to know their opinion. Debi
Electronics Forum | Tue Apr 20 11:06:58 EDT 2004 | mrmaint
Hi Debi, I have worked with both these printers in the past. Had some problems with the DEK. Take it for what it is worth but the MPM seemed more dependable than the DEK.
Electronics Forum | Thu Apr 22 14:31:03 EDT 2004 | northern
I have used both the MPM and DEK. The MPM's look nicer and have a few fancy features but the DEK printed more consistent time and time again. I believe you spend a lot more money for MPM's when DEK will give you what you need.
Electronics Forum | Thu Apr 22 14:15:35 EDT 2004 | russ
Well so much for being too hot! Try kicking your max temp up to 220, I wouldn't extend the duration however. I would almost start to think that this QFP has a pb free finish. Let us know what happens Russ
Electronics Forum | Fri Apr 23 12:47:29 EDT 2004 | barry
I have increased my peak to 220, and Flow is better, but it still not quite a good fillet all around. The solder tends to kinda "bunchup" at the toe of the lead. If part is Pb free, would this affect adhesion and or flow?
