Electronics Forum | Fri Jan 17 11:40:36 EST 2020 | davef
Try preheating the connectors
Electronics Forum | Tue Jun 20 23:04:16 EDT 2000 | Dave F
Hi Gary: I'm sorry for not being clear. You should be concerned about the change in temperature between the end of preheating (actually just before the wave) and the wave. So, it is the difference between those two temperatures you should try to k
Electronics Forum | Wed Jul 25 12:58:04 EDT 2001 | BGA rework expert
A key factor is underside Pre Heater ----- Conceptronics makes the best in terms of IR Preheat----- Most machines have forced convection from the top and bottom --- the preheater is the key on larger more dense boards. Placement accuracy is also bett
Electronics Forum | Thu Mar 04 10:21:55 EST 1999 | Igmar
Can someone please advise me to the rework procedure for removal and replacing Ceramic Chip Capacitors (e.g. 0805, 1206, etc.)? Is it necessary to pre-heat ceramic capacitors before soldering them onto a PCB with a soldering iron? Is this just a rec
Electronics Forum | Mon Mar 08 16:23:24 EST 1999 | Dave F
| Can someone please advise me to the rework procedure for removal and replacing Ceramic Chip Capacitors (e.g. 0805, 1206, etc.)? | | Is it necessary to pre-heat ceramic capacitors before soldering them onto a PCB with a soldering iron? Is this just
Electronics Forum | Thu Feb 26 16:49:57 EST 1998 | specnor tecnic corp
we have some rebuilt wave soldering systems in stock ready to be shipped. epk-ii smt with lambda wave, chip wave ,omega wave. 4 preheaters,jacking stand roll out computer control. machine is in a great shape. another machin upk15f with 6 preheaters
Electronics Forum | Sat Jan 19 02:29:11 EST 2002 | ianchan
Thanks for the tips... found out the ex-employee guy, had pre-bake conditioning put into the process flow, as this pcb is made of polymide material, that is reputed to have historical patterns in thermal sensitivity. To avoid "thermal damaging" the
Electronics Forum | Wed Mar 05 13:12:33 EST 2003 | msivigny
Hello davide, the biggest advantage you'll find with a complete N2 tunnel is the minimization of oxidation during board preheating. Using only an inerted solder pot allows the oxidation to build up throughout the preheat stages and introduces contami
Electronics Forum | Thu Jul 17 11:34:35 EDT 2003 | pjc
� Center board support: - Stationary tension wire - Adjustable width and height position (manual) - Pneumatic raise/lower feature; extends through preheat and solder wave - Minimum board clearance on bottom preheater #1 is 63.5 mm (2.5 in.) with
Electronics Forum | Thu Jul 31 15:29:25 EDT 2003 | bcceng
A couple of things you can look into 1. The proper bottom pre-heat of board. If you are applying only direct hot air to BGA without preheating can cause BGA's to warp and collapse un-even. 2. Moisture on you BGA's. If BGA's were not properly packa
