Electronics Forum | Tue Jan 17 11:52:07 EST 2006 | pms
Got a wierd one here, 0402's tomb-stoning. Scenerio---- Double sided PCB, paste both sides, 0402 on both sides. Reflow bottom side first--- no problems. Reflow topside next----no problems with topside components, BUT, the bottom side that was ref
Electronics Forum | Tue Jan 17 17:41:14 EST 2006 | pms
GEB, The parts that are tombstoning have all ready been through reflow once with no problems, so I assume the paste and the positioning was correct the first time, since they did not tombstone through the first reflow. This is very strange.
Electronics Forum | Wed Jan 18 10:35:17 EST 2006 | pms
Thanks folks !! I'll experiment with the bottom side heaters. Unfortunatly I don't think our Vitronics-Soltec oven has the option for adjusting the heater fan speeds. And I'll check the conveyor chains. This is our first project using 0402 parts, wh
Electronics Forum | Wed Mar 08 17:51:27 EST 2006 | pms
Chunks nailed it. You should not expect to see a perfect side fillet on this part, especially using no-clean, it's probably bare copper, hard to wick solder up the side of the lead.
Electronics Forum | Thu Apr 20 14:24:54 EDT 2006 | pms
Sr.Tech, Don't know about AP25's, we have a DEK. We have problems with some large board sagging in the middle, causing the board to slip under the board stop, but our DEK has the ability to program the board stop anywhere in the Y direction, allowin
Electronics Forum | Thu May 18 11:01:08 EDT 2006 | pms
SEEEEEEEEEEE YAAAAAAAAAAA WML............
Electronics Forum | Thu May 25 18:32:12 EDT 2006 | pms
Having an issue with our paste inspector (human type). Were printing paste on .5mm pitch pads (MLF package). My question is - What is the acceptable print deviation (percentage) off the pad before you see problems after reflow? 0%? 1%? 10%? 25%?
Electronics Forum | Fri May 26 10:33:10 EDT 2006 | pms
Thanks for the inputs. No time for DOE's (you know the drill). I need to get this inspector off my arss. I'm gonna give the inspector Russ's 25% answer AND his e-mail address !!!! LOL
Electronics Forum | Fri May 26 11:06:49 EDT 2006 | pms
Chunks, ROTFLMAO !!!!!!
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