Electronics Forum | Wed Dec 04 07:35:08 EST 2019 | proceng1
We also have a few customers that seem to buy the cheapest LEDs available and provide them for the build. We've had complete reels that had obviously been exposed and oxidized. You can try a solder with a more aggressive flux. How long is your pro
Electronics Forum | Wed Apr 14 20:48:43 EDT 2004 | Ken
Just a thought.... Some Fluxes require temperatures upto 260F (127C). Are you using water based flux or solvent (alcohol). I have noticed that many wave machines are NOT capable of preheating adequately when using water based materials. This can
Electronics Forum | Tue Jul 31 17:11:28 EDT 2007 | rpadilla
Is the via hole not supposed to be there, or is this by design? If you are trying to fill the via hole with solder and not have voiding issues, I suggest using a type 4 solder powder mesh size. Reason being, anytime you go beyond Type 4 mesh, to so
Electronics Forum | Thu Jan 08 16:16:09 EST 2004 | Dean
My first concern would be the choice of solder paste you have. There are better chemistries out there that far exceed the capabilities of the 609 2. Yes, the part will partially float on the solder (assuming plastic qfp). Cross sectioning would sho
Electronics Forum | Wed Jan 14 10:07:38 EST 2004 | Patrick
More on QFP soldering issue as per Paul f original e-mail. 1. Problems occured on different PCB's, on different lines using different equipment 2. Flux residue is common in the dimple on the solder. 3. The fault occurred using both "Kester 265" & "Al
Electronics Forum | Tue Feb 27 03:35:23 EST 2001 | peterbarton
Steve, I have to support the comments made by Dave F. Provided the surface mount parts on the second side are correctly orientated and not too close to any adjacent through hole leads then the best option has to be to print glue then wave solder. T
Electronics Forum | Wed Dec 04 10:59:04 EST 2019 | dwl
The solder looks a little grainy for Sn/Pb solder but that might just be the picture quality. There appears to be plenty of solder on the pads, so I'd rule out anything to do with the stencil. One possibility that springs to mind; how long is your
Electronics Forum | Tue Nov 09 10:35:02 EST 1999 | WilDaly
Tim, I try to get 2-3 degrees C/sec (bottomside) rise on my boards through wavesolder. I like to get the topside to about 90-95 degrees C, but this is the optimum temp for the flux that I am using. To fast of a slope and you will burn your flux of
Electronics Forum | Thu Feb 20 00:51:42 EST 2003 | Joe
We are running an RMA flux (Kester 1515). Changing the angle didn't help any so we're back at 6 degrees and placing an order for the lambda nozzle changeover. Are you currently running the debridging knife?
Electronics Forum | Fri Dec 01 08:58:05 EST 2006 | russ
orientation is also a factor here, So what is the pitch of these connectors? the lead length? the hole dimensions? surface finish? and what type of wave and flux are you running? Shorts are pretty easy to eliminate if everything is of adequate des
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