Electronics Forum | Sun Jun 17 08:40:37 EDT 2007 | sami
Yes We have a belt mesh oven with several PCBs side by side . but the problem I am talking about is before the oven because if we have more PCBs inserted the oven can order them with any problem ( SMEMA ) . bets regards
Electronics Forum | Mon Jun 18 11:55:36 EDT 2007 | realchunks
Hi Sami Why not think the other way? You know, making your board a multi-up panel? The old style way "designing for manufacturing" still exists...... right?
Electronics Forum | Mon Jun 18 16:24:12 EDT 2007 | fastek
Hi Sami > > Why not think the other way? You > know, making your board a multi-up panel? The > old style way "designing for manufacturing" still > exists...... right? And/Or get a much quicker printer.
Electronics Forum | Mon Jun 25 18:15:14 EDT 2007 | ratsalad
Your placement machines are too fast. Slow them down and the line will be balanced. This is the easiest way to make the industrial engineers happy.
Electronics Forum | Tue Jan 13 13:03:20 EST 2009 | davef
While you're waiting for others to reply, search the fine SMTnet Achives to find threads like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=43910
Electronics Forum | Mon Apr 26 10:29:49 EDT 2010 | davef
Set pump speed so that the board is 1/3 to 1/2 immersed as it goes through the wave.
Electronics Forum | Wed Jun 13 20:38:23 EDT 2012 | kahrpr
It is possible that there is nickel contamination in the gold. Depending on your plating board vendors put nickel down first. The plating also could be to thin. Dave had a good suggestion in trying to solder the pad with a Iron that will tell a lot.
Electronics Forum | Fri Jun 15 11:22:14 EDT 2012 | hegemon
Good info above from davef Solder pot contamination seems likely, are you using any dross reducers or additives that might be reacting with this particluar batch of PWBs? 'hege
Electronics Forum | Thu Jun 21 23:00:16 EDT 2012 | davef
It's possible that if the nickel on your board was skip plated by your fab that you would get the symptoms that you describe.
Electronics Forum | Fri Jun 22 07:16:37 EDT 2012 | brettrenishaw
Spray fluxing yes but have checked the uniformity by using a fluxometer. Also have put boards through with only flux and preheat. no wave up to see if the carrier is being burnt off. I will look into the skip plating issue. Thanks again
