Electronics Forum | Fri Mar 17 09:24:22 EST 2006 | russ
nothing appears to be out of line. Is this KOKI a no-clean or water soluble? You may want to try to hit 225 at the problem lead with a TAL of 70 sec. You may also want to remove the soak or at least shorten if you can. We were talking about a s
Electronics Forum | Wed Jul 19 10:57:25 EDT 2006 | Rob
Depends on a number of things - such as type of oven, type of components, if you are washing the boards or not, etc. Assuming nothing special, no clean, I would try the following (in that order): Koki: S3X58-M406L Almit: LFM-48 Indium: 5.1 Cheers,
Electronics Forum | Wed Oct 19 04:52:40 EDT 2011 | ranco13
Hi, we have ERSA flow selective machine. We are using 420s-lf No-Clean flux (lead free process). It is water based. Before that we used for about 2 years in JS-EU-31 (KOKI) (alcohol based). It did excellent job (we moved to water based flux just bec
Electronics Forum | Tue Dec 04 14:16:32 EST 2012 | eniac
AIM can give a good result, I tried the solder paste from many manufacturer - AIM, Kester, Indium, Koki, Alpha Metals, Heraeus - but I stopped my choice at Kester. For example, right now I have EM907 with date of manufacture in february 2010 (it's ju
Electronics Forum | Mon Mar 24 00:54:49 EDT 2014 | isd_jwendell
Don't do that! When solder paste dries out, all parts of the flux do not leave. The volatiles leave. Adding new flux messes with the chemistry and %metals and will not perform like new paste. If you can, get your paste in cartridges. It will last lo
Electronics Forum | Wed Oct 30 02:12:39 EDT 2019 | jags
yes and thanks for this feedback. we clean with degreaser ( strong) and flux is rosin with 10% in the paste (koki). we clean after second reflow . the gap time from bottom to topside completion is 10 hours. cleans with this time. my even after 20 h
Electronics Forum | Thu Mar 15 06:26:26 EST 2001 | Sal
Sorry for the lack of information provided, I'll try again : Test Points are the one's that are not soldering. The test points are round in geometry, 0.5MM(metric) in diameter with a HASL finish.The test point are no different to the ed through hole
Electronics Forum | Fri May 12 08:50:40 EDT 2006 | Rob
Just come back from Nepcon (electronics show on an obscure little island on the other side of the pond) and had a good chance to look & play with a whole bunch of solder wire. Koki do one that is aprox. 99/0.7/0.3 with 0.03 Cobolt in. They claim th
Electronics Forum | Mon May 15 04:33:35 EDT 2006 | Rob
Hi Steve, Although your opinion is valid, calling something from a respected Japanese manufacturer crap is a little harsh. I have seen many people solder very well with all sorts of leadfree alloys - not producing crap. I've already had a play wit
Electronics Forum | Thu Sep 07 08:50:45 EDT 2006 | Grant
Hi, We have seen a slight rise in failures in a product, and on investigation, the BGA ball has cracked off the PCB. It's below the intermetalic layer in the ball. Reflow otherwise looks good, and the raw components are clean. I am wondering what c
