Electronics Forum | Tue Jul 29 05:04:20 EDT 2003 | gregoryyork
Dear adam Sounds to me like it may not be Salt water contamination or even flux residue's, as both of these are commonly cleaned semi aqueosly or with IPA. Have you considered it may be Talcum powder used as fillers in solder resist, mineral salts
Electronics Forum | Mon May 07 11:08:13 EDT 2007 | gregoryyork
Are the pallets hot and killing the foam head as they pass over or is the air pressure on the air knife toi high travelling back along the board killing the foam. If these are OK make sure you have sufficient back flow onthe wave and you are draining
Electronics Forum | Wed Dec 10 05:11:55 EST 2008 | gregoryyork
I would first check to see what the maximum temperature this operates at I remember seeing my first one on Ebay the other day and it is a small bench mounted machine. You need to ensure the solder bath will operate up to around 260 - 270C. ALL Lead F
Electronics Forum | Fri Sep 18 04:19:33 EDT 2009 | gregoryyork
Glycerine on a PCB is very bad news as it is Hygroscopic and can attract moisture to the Circuit. Alot of this used to be used in HASL Fluxes and is a no go for Circuits that are not going to be washed. They too could dissolve the natural Halides fro
Electronics Forum | Thu Sep 27 10:53:59 EDT 2007 | gregoryyork
Joris, > > Yep, very common to have those small > blow holes in lead-free alloys. We used to get > them very consistently on white-tin finished > boards, and less frequently with gold finished > boards, for what ever that is worth. > > IPC-6
Electronics Forum | Fri Sep 28 04:49:09 EDT 2007 | gregoryyork
Just a shame that the HASL fluids that are used contain Hydrobromic or hydrochloric acids or a mixture of the two and are full of strong wetting agents that are NON IONIC so the IC test results mean very little as they are checking for Ionics only. P
Electronics Forum | Mon Jan 14 06:28:18 EST 2008 | gregoryyork
Hi its normally down to the state of cure of the resist type not the actual type be it matt or gloss. If its not cured correctly it will produce solder balls. Pending where you are you could try our 35-41 or new 35-41-30 flux this will reduce the pro
Electronics Forum | Thu Jul 10 10:25:05 EDT 2008 | gregoryyork
I guess the paste is Leaded hence the 220 Peak temp and the Sn100c is Eutectic at 227C so you need to be hotter to melt the HASL finish or you are relying on it alloying together with the paste which takes much longer. suggest running peak temp of 23
Electronics Forum | Fri Sep 05 13:21:26 EDT 2008 | gregoryyork
We manufacture a low cost machine completely Air driven for Misprints only but dont have an agent in the USA unfortunately or could have demo'd it for you They do work very well with IPA derivative cleaners but IPA on its own is very poor. Best metho
Electronics Forum | Tue Aug 04 17:17:17 EDT 2009 | gregoryyork
Certainly does look like solder deposit across the board. Check to see if fluxing correctly. Best way is to hand flux the PCB ensuring you put plenty on. IF you still get the same result then probably down to resist absorbing the flux due to porous r
