Electronics Forum | Thu Oct 04 10:54:11 EDT 2012 | eniac
I have only one incredible idea: this is example of different speed of heat transfer of neighboring pads. I saw it two times during last years, but on lead solder pastes (Sn63Pb37). The reason of this mistakes each times we found two: 1. errors duri
Electronics Forum | Fri Jan 18 12:34:14 EST 2013 | duchoang
Yes, I have. think I have pretty good reflow profile. We use Lead-Free,No-Clean,SAC305 Solder Paste. The problem is at LGA design.The pad size is alot bigger than BGA. They are totally flat and do not have balls/spheres which melted and collapsed thr
Electronics Forum | Tue Feb 05 16:06:48 EST 2013 | mlevesque
We are looking for a new BGA rework station. We got an ERSA IR550A and we are not very satisfied. I'm not sure that IR reflow is the better solution because the top-side heating is too large. I think is better with a convection "forced-air" heat.
Electronics Forum | Tue Feb 05 20:31:39 EST 2013 | hegemon
Air Vac DRS25. Hands down the best rework EQ. (my humble opinion, based on my own experience with rework EQ going back 15 years +) Right in your budget. Complete capability for rework. SMD, BGA, POP. Full profiling capability. Massive bottom heati
Electronics Forum | Fri Feb 22 18:36:36 EST 2013 | austinpeterman
Has anyone experienced bridging on topside (solder destination side) surface mount devices after wave soldering? We x-rayed 100% of the placements after smt re-flow with no issues. When the same placements were x-rayed after the tht wave solder pro
Electronics Forum | Mon Mar 11 09:46:04 EDT 2013 | cyber_wolf
The surveyor is a a plate that I use to "survey" or verify the oven on a weekly basis. The data logger or profiler is the actual unit that follows the board through the oven to take readings. I don't think the zone thermo couple that measures temp a
Electronics Forum | Fri Mar 22 10:33:58 EDT 2013 | mbrett73
Hello guys, I´m pretty new on pcba process and I´m writing to see if you can help me, we have combo process om pcb for UPS boards and we are facing a lot of shorts after wave the boards. We did few tests with different fluxes different profiles chan
Electronics Forum | Fri May 03 16:06:44 EDT 2013 | hegemon
To be short, no change in profile is going to get you through this. As I recall the point of hard gold is to retard the wetting process, so no surprise here. For example a connector might have hard gold plating at the mating surface, but not at t
Electronics Forum | Thu May 09 15:44:23 EDT 2013 | redman123
Hi all, Using I-pulse M20. Can anyone advise if stock profile can be outputted in constant text format? Currently can output CSV file but format is not as desired. Other outputs give quantities but not locations or stock code. Would like something li
Electronics Forum | Mon May 20 19:24:59 EDT 2013 | hegemon
Well, you wouldn't want 100 deg difference from zone to zone, in that you would likely exceed your maximum ramp rate, for instance if Zone 1 was 90C and zone 2 was 190C. Over time a general guideline (rule of thumb) has emerged, max about 40 deg dif
