Electronics Forum | Thu Dec 29 10:47:22 EST 2016 | luciano
Thanks SuMoTe, I've already tried fluxing various boards (new clean ones and older ones) without turning the waves on and with different temperature setups (within the suggested params from Alpha) in the preheat zone. The results were in many cases
Electronics Forum | Mon Jun 05 18:45:07 EDT 2017 | zsoden
Hi Steve, I agree with your assessment, it would certainly seem like the pads are de-wetting. But what could be the cause of this? Contaminated solder? The boards are new out of vacuum sealed bags (with desiccant sachets), so I can't see it being the
Electronics Forum | Wed Jun 21 11:18:57 EDT 2017 | capse
Hello, > > I have an assembly that I am > considering to run in a regular process(SMT, > Wave)and afterwords solder 22 electrolytic > capacitors. Due to the multi-layer board it is > not an easy task, so I was wondering if you guys > know any t
Electronics Forum | Thu Jun 22 07:30:25 EDT 2017 | stephendo
Any possibility of having some changes made to the PCB for future runs? Can the ground connections be modified to have thermal relief patterns? At one time occasionally people would come to me to tell me that the power was out at their work station
Electronics Forum | Tue Jun 27 12:21:32 EDT 2017 | deanm
Sounds like a selective soldering machine would be your ultimate answer. But if you must hand solder, an oven, preheater or anything to heat the core of your board would help as mentioned before. We've used hot plates with success. As far as irons g
Electronics Forum | Thu Oct 04 15:11:39 EDT 2018 | emeto
1. From your explanation it looks like you need more flux. Try to overprint a little or use 150um thick stencil 2. You should consider a little different profile - probably try to have a soak zone in the right alloy and flux range and give the part t
Electronics Forum | Wed Feb 13 06:16:11 EST 2019 | pace_worldwide
PACE produces several BGA Rework Systems that are robust enough for your application. Go to paceworldwide.com/bga to find out about them. I recommend you look at our new TF2800 BGA/SMD Rework Station as it has a massive preheater which is likely to g
Electronics Forum | Wed Feb 13 16:38:56 EST 2019 | spitkis2
BTW - in our testing on housings with Sn42Bi57 paste, it took 240 seconds to reach 140C on an aluminum module with a mass of 0.75 lbs. This was from ambient and only using machine preheating before having the top heater turn on to peak at 162C. Sa
Electronics Forum | Thu Feb 14 11:22:45 EST 2019 | spitkis2
Here are the details on the rework station: https://atco-us.com/products/item/1-at-gdp-smd-bga-placement-rework-stations If you have interest in a reflow oven to preheat or solder within microwave housings take a look at https://atco-us.com/index.ph
Electronics Forum | Fri Oct 02 11:02:24 EDT 2020 | proceng1
Do you preheat the board? Do you apply on two sides and let it fill under, or along all 4 sides? Does it bleed away from the part as well, or does it wick under the part during reflow? Basically, we've never used underfill before. So I don't know
