Electronics Forum | Wed Apr 18 01:07:25 EDT 2001 | MW
I some something like this. My package was not flat the belly of the body rested on the PCB. We found that every 4-5 part would wander to the side. What was puzzling is that the blowers would have blown it the opposite side. ultumately we proved
Electronics Forum | Fri Apr 20 16:11:29 EDT 2001 | davef
Good to talk with you too. Oh, just the way I had it pictured!!! Yeh, right!!! [http://davesmt.50megs.com/pictures select kristenna.jpg ] Which part of the antenna "sees" heat first [Are all legs (vertical part), two legs, or one leg of the anten
Electronics Forum | Tue Apr 17 13:33:00 EDT 2001 | Kris W
Howdy all! Nothin' up my sleeve!!! While attempting to reflow an RF antennae on std FR4, HASL coated, using no clean paste, in a Research Thermaflo 10, the part sometimes slides on one of the pads (as much as 0.125"). There is a slight amount of w
Electronics Forum | Tue Apr 17 21:05:06 EDT 2001 | davef
So, we�re talkin� �bout the smaller end of a "large" paper clip after it�s unfolded once, eh? In keeping with your "nothin� up the sleeves" full disclosure, I�ll bet you�re feelin� a little sheepish about not tellin� us about: * Antenna pad dimen
Electronics Forum | Fri Apr 20 11:07:52 EDT 2001 | kawiederhold
Hi Dave, Good to "talk" to ya again!! I have attached a photo of the antenna. Hopefully it will work its way through the system. The pictured antenna meets all our criteria. The defective antennae all seem to slide toward the center of the PCB (
Electronics Forum | Thu Aug 13 14:10:01 EDT 2015 | markhoch
Hi Sam, I have a feeling that what you're trying to communicate is that your DPAK's are skewing off the pad during reflow. This is caused by a thermal "mismatch" where the solder paste on one side of the DPAK becomes molten before the other, then th
Electronics Forum | Tue Sep 07 22:15:26 EDT 1999 | NAZEEH CHAUDRY
| | | I have a zevatech 570 and 560 my boss want to place bga.s with these machines, Ive told him he needs to ugrade to newer machines. Zevatech say "no problem our machine are number 1". | | | these machines dont even offer bga selections. These mac
Electronics Forum | Tue Sep 07 06:14:27 EDT 1999 | Earl Moon
| | I have a zevatech 570 and 560 my boss want to place bga.s with these machines, Ive told him he needs to ugrade to newer machines. Zevatech say "no problem our machine are number 1". | | these machines dont even offer bga selections. These machine
Electronics Forum | Tue Sep 07 22:07:56 EDT 1999 | NAZEEH CHAUDRY
| | | I have a zevatech 570 and 560 my boss want to place bga.s with these machines, Ive told him he needs to ugrade to newer machines. Zevatech say "no problem our machine are number 1". | | | these machines dont even offer bga selections. These mac
Electronics Forum | Wed Sep 11 23:20:44 EDT 2002 | scottefiske
Profiles are absolutely the first course of action to validate. A few additional questions would be: * Moisture can cause warping as well, verify the manufacturers recommended handling procedures were followed. * Where is the suspect BGA located
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