Electronics Forum | Thu Oct 30 11:34:51 EDT 2008 | davem
Guys, So I recently started working for a small CM in Southern N.H. We currently use 2 Magic Chef Mini wine friges to store the solder paste (63/37, RoHS). I've been monitoring the room temp (and humidity) and the frige temps all this week. The pro
Electronics Forum | Thu Jun 24 04:38:31 EDT 1999 | Vinesh Gandhi
Recently, there has been an upsurge in the Pin Hole/Blow Hole problem in our wave soldering process. We are baking the PCBs for 2 Hrs. at 125 degree C. The Wave Soldering profile seems to be O.K. Still the problem is persistent. Can somebody help
Electronics Forum | Thu Aug 16 11:57:53 EDT 2001 | Hussman
Hi Dan, Did the manufacturer specify the temp at which to store your paste? You could be 20 degrees apart from each other. Plus, room temperture to you may be 74 degrees F, while to a hard nose owner who doesn't like heating his building, it could
Electronics Forum | Tue Jun 25 15:42:39 EDT 2002 | Daan Terstegge
Hi Steve, To my opinion your peak temperature is a little low. If you are sure that the BGA (especially the balls under it) reaches this 205 degrees then it should be OK, but if you measured somewhere else on the board then it's probably better to r
Electronics Forum | Mon May 15 10:16:36 EDT 2006 | slaine
Hi Im trying to find a supplier for 30swg HMP solder wire idealy the alloy I want is 93.5Pb, 5Sn, 1.5Ag, 296 to 301 degrees C. Flux cored. 30swg or 0.3mm diamiter. but the critcal parts are the diameter and the melting point, 300 degrees +-20 degree
Electronics Forum | Tue Jun 20 21:30:05 EDT 2006 | davef
The minimum vertical hole fill is defined as follows: Class 1: Not specified, with a 270-degree circumferential fillet and wetting on the secondary (solder source side) of lead and barrel, and a 75% coverage of the land area on the secondary side. Cl
Electronics Forum | Tue Nov 21 20:21:11 EST 2006 | billwestiet
Most machines for lead free have adjustable conveyor angles (4 to 8 degrees). In the good ole days with lead, we typically ran at about 6 degrees. Often we see closer to 4 degrees with lead free. This is very common, and provides longer immersion
Electronics Forum | Fri May 30 08:24:08 EDT 2008 | cyber_wolf
The nozzles get centered at zero degrees and 180 degrees. I believe the yellow asterisk is the measurement at zero degrees, when it rotates to 180 is when you will get a red X or a green O. (In other words the yellow asterisk is normal) I think you
Electronics Forum | Thu Aug 28 18:48:49 EDT 2008 | markhoch
You're using a SAC305 chemistry? Double check your liquidus temp! Your profile shows a liquidus temp of 217 degrees C. SAC305 is not eutectic. (It doesn't transition from paste to liquid instantly). It goes thru a "pasty" stage. We use a temp of 221
Electronics Forum | Tue Feb 18 20:04:38 EST 2020 | SMTA-Alex
Sebas, some things in your profile don't make sense. 3 of your thermocouples, #1 # 4 and #6 are consistent. The others show completely different data. The consistent thermocouples, also, show peak temp at 241 - 243 degrees. That is extermely high for
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