Electronics Forum | Thu Jun 06 12:24:30 EDT 2002 | cyber_wolf
Brad your theory sounds good, but I have seen this happen at very low ramp rates .5 deg to 1.5 deg C rate of rise a sec. with the same soak duration you mentioned. If flux spattering is the case and you are using Alpha paste..switch to Indium and yo
Electronics Forum | Wed Jun 26 15:34:09 EDT 2002 | Daan Terstegge
It does work, but you must keep in mind that not only the stencil must be designed for it, but also the board. Trying to use the pin-in-paste process for a connector with an ordinary wave-solder layout will result in lots of touch-up. You'll need sma
Electronics Forum | Thu Jul 25 05:56:32 EDT 2002 | ericchua
Hello, Understand you have problem of cleaning adhesives from Dek Pump Print stencil. Well, we have a cleaning machine which able to clean solder paste and adhesives. And also, we are not using any chemical but use water-base detergent. We had few c
Electronics Forum | Mon Jul 29 08:21:54 EDT 2002 | pjc
All DEK 248 semi-auto printers have been built in China for quite some time (years). Its shipped to the UK from China. All DEK ELA models are now built in China (past 6 mos.?). Thats the fact Jack. All MPM models are built in Mass. Its the savings in
Electronics Forum | Wed Aug 07 05:08:04 EDT 2002 | matherat
This sounds like it could be a SIPAD solid solder application. Bring the boards in with the solderpaste already on them in a flattened solid form. Then you could print glue on them without disturbing wet paste. 1.Print glue. (Might take a little
Electronics Forum | Mon Aug 19 20:45:31 EDT 2002 | davef
Bob Willis and Phil Zarrow have had a running commentary on the ability of reflowed solder to hold components on the bottom side during reflow. You can find references to their component weight to pad area rations in the fine SMTnet Archives. The
Electronics Forum | Thu Aug 29 20:15:26 EDT 2002 | davef
That you are getting BIG gobs of solder on the pads indicates that your print / paste process is probably OK. Sounds like someone did something bad to the OSP. Tell us about: * Supplier and brand of OSP that your board fabricator used. * Number of
Electronics Forum | Fri Aug 30 22:20:27 EDT 2002 | lysik
265 is a great unit. Your process should be OK. I am sorry I asked you to check it I just wanted to start with the basics. I am at a loss. May be a bad batch of paste. I am reaching for straws. I know it sounds crazy but try a really slow (snap off)
Electronics Forum | Tue Sep 03 00:03:00 EDT 2002 | TLe
Thanks Guys, I agree, you have to start with basics. Tri Jet, you have a point there: " art not not a science". Basically, it is a simple process. Maby that is why we "rocket scientists" try to get far-fetched answers to our process challenges, it
Electronics Forum | Wed Nov 06 05:13:01 EST 2002 | Dreamsniper
Crystalline flux if it is really clear should not be a problem. We were using Amtech paste before and we have the same results. Sometimes we mistakenly see it as a dry joint because of the reflections from the lighting of our Metcal inspection system
