Electronics Forum | Thu Dec 23 16:42:14 EST 2021 | davef
Check technical papers in Nov 4, 2021 Newsletter [ https://smtnet.com/express/index.cfm?fuseaction=archives&issue=20211104] NovaCentrix's PulseForge Soldering In-Line, with proprietary high-intensity thermal technology, reflows a wide Range of t
Electronics Forum | Mon Apr 18 12:39:57 EDT 2022 | winston_one
Thanks for all comments. Process was adjusted normally, problem was in PCBs. Microsection of bare boards confirm that the copper thickness in troughholes was unsuffient, sometimes below 10 microns, on soldered boards where there were a problems durin
Electronics Forum | Wed Jun 08 23:04:26 EDT 2022 | SMTA-64387544
Au thickness of 0.125 um should not cause solder joint embrittlement. Also, PCB fab should offer Au thickness range between 0.05-0.075 um for better process control and reliability. Higher Au thickness may suggest black pads leading to solder joints
Electronics Forum | Fri Jun 10 13:54:01 EDT 2022 | davef
Solder connections to the castellated and other components need improvement. Are you profiling on the problem leads? Microchip Technology Inc. RN4678 Bluetooth module reflow recommendations - http://ww1.microchip.com/downloads/en/DeviceDoc/RN4678-Bl
Electronics Forum | Fri Jun 10 19:22:59 EDT 2022 | jdengler
Yes. We only do the side not under the component and do 25 mils if there is enough room. A solder preform is simply a block of solder that is shaped like a SMT component and comes in tape and reel. Most solder manufactures offer these. You can ta
Electronics Forum | Mon Jan 23 12:26:55 EST 2023 | poly
I'm looking at some Pillarhouse and Juki machines used. Does anyone have a strong preference on selective soldering brands? What's the life time on machine? Is buying a 10 year old machine a waste of time? What are you doing for nitrogen? I'm current
Electronics Forum | Tue May 02 14:53:31 EDT 2023 | jamesatqkits
Hi Bukas, thank you for taking the time to respond. My flow gauge shows 35 SCFH and the pressure is around 50 psi. Maybe the flow gauge is wrong? Thanks again. What delivery pressure do you run, if you run a selective solder machine? Thanks again. I
Electronics Forum | Sun Jun 18 19:59:28 EDT 2023 | smtusa
Seeing this graphic has me rethinking solder paste jetting as alternative to stencil printing. It seems it's only 2-3x faster 80k points per hour vs 28k. Wouldn't it be better to get 10 time pressure dispensers vs 1 solder jet?
Electronics Forum | Mon Dec 11 14:30:46 EST 2023 | proy
We all know that purity of nitrogen is critical for selective soldering. When it comes to wave solder- how much or what percentage reduction in oxygen is enough to make a difference in 1) at least reducing dross buildup and 2) being anble to cut ba
Electronics Forum | Mon Feb 26 20:05:09 EST 2024 | alexv
Leaded solder is liquidus at 183C, 220C is max. Sounds to me your boards might be contaminated or the plating is poor and allows oxidation. Without seeing the boards or profile, I recommend you slow down your oven for a longer soak, to allow the acti
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