Electronics Forum | Wed Apr 22 08:40:18 EDT 2015 | markhoch
Hi Myriam, I think we may need some more information. Is the Electrolytic (Aluminum) Capacitor placed more than once per board? If so, are all locations twisting? This would typically be caused by a thermal imbalance that could be design induced. (u
Electronics Forum | Fri May 22 12:42:43 EDT 2015 | deanm
Sr. Tech, you are right in that there is no verification of the profile. We are a Class 3 high mix OEM. We have visual inspection after SMT. We have not seen problems with wetting, grainy solder, cold solder, charred boards, etc. that would indicate
Electronics Forum | Fri Oct 02 10:34:20 EDT 2015 | dyoungquist
After looking at your profile, some general thoughts.... Your profile looks like what is commonly called a ramp-spike profile and not a ramp-soak-spike profile. Going off of Sarason's comment, you may not have a good soak period before the spike in
Electronics Forum | Wed Jun 08 17:35:04 EDT 2016 | slthomas
We all know that whenever possible, we want thermal relief between the barrel/pad and the copper foil to make it easier to properly solder that through hole connector. My question is, assuming there is no connection from the barrel to a copper layer
Electronics Forum | Thu Dec 08 13:34:46 EST 2016 | spitkis2
We are currently experiencing with our SMD Solder > Reflow Equipment on Shooting-Up Zones (Zones > 3,4,5,7 & even Cooling Zone). PV exceeds about > 5-10 degrees with the SP. (ex: SP=140deg, actual > PV = 145deg & higher). Our equipment undergo a
Electronics Forum | Mon Jan 30 22:45:30 EST 2017 | cmarasigan
Hello Marc, Thank you for the recommendation. I've contacted our local service support. We found out that heat coming from higher zones 7, 8 & 9 overflows to zone 3, 4 & 5 which affects actual temp reading at Z3,4,5. Since we already replaced some b
Electronics Forum | Fri Dec 30 11:31:32 EST 2016 | horchak
First profilers are expensive and you can use temperature dots for setting up a wave. You stick them to the top side of the board and they change color based on temp. Top side temp should be around 250f or 125c when it hits the fountain. If you spra
Electronics Forum | Fri Jul 07 09:22:17 EDT 2017 | westshoredesign
Are you reflowing them and they are coming out of the oven bad? If so, what kind of oven are you using? What kind of LEDs? What kind of solder? Mass of substrate? Have you ran a profiler through your oven and compared the plot to the solder's spec
Electronics Forum | Tue Mar 20 03:55:38 EDT 2018 | rob
MTC = Multi tray changer. It's a stand alone unit that feeds in trays of components - it means you don't sacrifice feeder locations to waffle packs. Different companies call them different things. A 760 is dog slow, and spares are getting harder to
Electronics Forum | Wed Mar 28 15:48:42 EDT 2018 | reckless
I have 3 phase power in my production area where I am running this machine. Technically the 110V was a wish as I have an empty office where I can put a number of machines but it doesn't seem like I would. So power is not an issue. I even have 480V
