Electronics Forum: greg york (Page 3 of 4)

SN100 Solder Bar

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

Hand Sanitizer

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

Blowholes during wave soldering

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

Ionic Contamination Tests

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

Micro Solder Balls in No Clean Selective Solder Process

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

Profiling - suspect flux burn out before reflow trouble shooting

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

Miss Prints

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

PCB residue after wave solder

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

Solder balls - Pb wave soldering

Electronics Forum | Thu Aug 12 13:34:03 EDT 2004 | gregoryyork

Yes unfortunately solder resist again, getting boring I know. That green stuff on the boards causes all kinds of problems if not applied correctly. Can't blame the flux (as usual) or the process as he has tried all varients to no avail and therosin s

Sn99 Cu0.7 Ag 0.3

Electronics Forum | Mon Mar 07 09:14:04 EST 2005 | Rob

Hi does anyone have any experience of running Sn 99 Cu0.7 Ag 0.3 solder in their waves? Also is there any reliabilty data available? I think it may also be called C7A3. All I can find is a brief mention in a table in IEC 61190-1-3 2004, and on a pr

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