Electronics Forum | Wed Feb 01 10:13:39 EST 2006 | kmorris
I haven't seen a hydrometer used in years. Are > you still foam fluxing? There used to be > automatic units available, but with the advent of > the spray fluxer, they may have dried up. If you > are still foam fluxing with alcohol thinner, >
Electronics Forum | Mon Mar 13 15:35:56 EST 2006 | russ
You're a piece of work! Why don't you work for any of the major wave companies? So how does slowing the conveyor speed eliminate drying flux? And when you slow it down, what speeds it up to make you say "I lower the wave because I get shorts going
Electronics Forum | Wed Oct 11 22:23:39 EDT 2006 | billwestiet
I've installed a number of these machines here in the US, several of them with VOC free applications. I would need to get a bunch of questions answered before I could make any suggestions: What is the pcb width? length? conveyor speed? flow rate (mm
Electronics Forum | Thu Mar 08 22:35:13 EST 2007 | davef
Suggestions are: * Procure solderable finishes that have sufficient thickness to avoid intermetallic problems and use storage conditions that do not promote oxide growth problems. * Bagging/sealing boards has been shown to extend storage durations i
Electronics Forum | Mon Jul 23 17:49:04 EDT 2007 | davef
We know nothing of DeFelsko, but do understand how they distinguish between the solder mask and the conformal coat. DeFelsko manufactures hand-held, non-destructive coating thickness gages that are ideal for measuring the dry film thickness of confo
Electronics Forum | Wed Jun 18 01:47:25 EDT 2008 | sleech
Innovative Drying Co., considered this possibility early in our experiments. The rate of chamber pump-down is not a consideration. However, the selection of the vacuum pump is critical. Avoid oil-sealed pumps at all costs. A poorly maintained oil-tra
Electronics Forum | Sat May 31 09:44:56 EDT 2008 | gregoryyork
looks like the board has gone through and not actually fluxed properly,trying hand applying and it should fix it. IF it still occurs put the pallet through without pcb and without flux and see what residues come off in the wave. residues you are seei
Electronics Forum | Mon Nov 24 07:36:15 EST 2008 | davef
No, but we find discussions about relative humidity fairly short sighted, because relative humidity is such an imperfect measure of the amount of moisure in the air. Dew point is much more appealing. R.H. = (amount of moisture)/(maximum amount that
Electronics Forum | Tue Jan 20 07:57:00 EST 2009 | mrdtech
Depends on the solder paste. If it has been on the stencil for 24h there is a good chance that the paste is destroyed. You can however check if it has not dried out too much by letting the stencil printer do a few strokes and see if the paste still h
Electronics Forum | Tue Apr 07 15:36:15 EDT 2009 | gtemkin
Most of the conformal coating manufacturers recommend verifying the compatibility of their coating with the solder mask, so it's no surprise that occassionally there will be such issues. Are you sure your conformal coat is completely cured? If your
