Electronics Forum | Tue Jan 12 09:29:37 EST 1999 | Dave F
| | | We are currently fighting a dross battle on our non-inerted waves. We are currently using a bar solder that barely meets QQS-571 for Alloy/Impurity. | | | | | | Is anybody using HI FLO in a non inerted wave? Do you see a measureable decrease
Electronics Forum | Thu Jun 07 03:54:16 EDT 2007 | testbloke
I currently have issues with "slivers" of solder on or behind QFP devices. This has only occured on PB Free boards (we currently produce PB and PB Free on same equipment). This is not tin slivers, this is a long thin sliver of solder measuring up to
Electronics Forum | Wed Mar 07 08:37:29 EST 2007 | davef
First, don't put solder paste in a wave solder pot, the 50% by volume of organics and volatiles will gas off in an astonishing amount of fume, leaving a dismaying mess of spent resin and molten plastic in your pot. Second, when you say, "Paste that
Electronics Forum | Tue Nov 13 21:59:42 EST 2007 | davef
This processes has the potential to cause barrel cracking and pad lifting, because the heating is very hot [troop crank-up the volume on their iron when they see thick boards] for a relatively small area on one side of the board. What do we suggest
Electronics Forum | Wed Jun 30 11:38:05 EDT 1999 | Brian Conner
| We are wave soldering some fabs with a lot of unmasked trace area along the edges. The trace area is solid copper covered with tin / lead, no masking, no components along the edges, same on solder side and component side (goofy board design). Ins
Electronics Forum | Sun Mar 26 19:02:05 EST 2006 | ms
Hi We are running automatic stencil printers, open squeegees, stainless stencil, stainless blades, print speed 25-30mm/sec. We have a frustrating consistency issue printing .37x.3mm apertures on a 45pin LGA (11 pads each side, 1 large ground in mid
Electronics Forum | Wed Mar 14 09:44:06 EDT 2007 | Cmiller
We use cartridges, that way nobody can mix back in paste off the stencil and no air can get in period. Any paste that is still good to use when removed from a stencil at the end of a job is put into a small pink zip-lock baggy with the date written o
Electronics Forum | Thu May 27 17:14:38 EDT 2010 | davef
Louie: Are you telling us that SPEED is the reason that you're considering this machine? Who cares how fast the printer runs, when the placement machine is slower? Crazy money!!!
Electronics Forum | Fri Nov 17 19:28:36 EST 2006 | rob@spinpcb.com
What kind of board finish do you have? You describe solder bubbles...and when you remove them, you find open vias. Are you, by chance, discovering flux contained in these bubbles? We've been experiencing the same thing with pb-free soldering on a
Electronics Forum | Fri Apr 21 14:58:04 EDT 2023 | rgduval
I mean...there are a ton of possibilities for bridging on selective solder before you ever get to alloy purity. Are the bridges happening consistently in the same spot? Are the leads too long? Can you modify the approach/exit/peel off to address? Wh
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