Electronics Forum | Mon Jun 05 17:37:51 EDT 2017 | stevezeva
Hi Zac, In looking at your photos, you may not be having a problem with your machine, but with the solderability of the PCB. I've zoomed in to an area that looks to me like the solder has de-wet from the pad. The leads appear like it almost has a fi
Electronics Forum | Mon Jun 26 08:57:17 EDT 2017 | capse
If N2 is not an option, the cut wire feeder or drilled wire are your best bet for now. You need to optimize wire feed rate as well. The solder joint on the robot takes about the same time to form as in manual soldering. If you need to speed the solde
Electronics Forum | Fri Feb 09 13:28:24 EST 2018 | jmedernach
Pin holes in the solder joints on various devices can be an indicator of something amiss with the solder paste itself. Solder paste storage may be a concern. Do you possibly have someone putting paste back in the refrigerator after use? Are you tr
Electronics Forum | Thu Nov 29 22:51:18 EST 2018 | jandon
IPC J-STD-001F: 6.2.1 Solder Application: Solder shall (N1D1D3) only be applied to the one side of a PTH except for intrusive soldering. Heat may be simultaneously applied to the both sides of the PTH.
Electronics Forum | Mon Jan 21 11:41:39 EST 2019 | SMTA-Tony
Lead free HASL coatings can be susceptible to yellowing during reflow due to oxidation of the tin in the coating. Some HASL solder suppliers use anti-oxidant additives in the solder to limit or prevent yellowing of the coating. You may want to ask
Electronics Forum | Mon Apr 01 03:55:59 EDT 2019 | robl
Hi Lee, Depends on the pitch, but 3 main options: 1) Use solder preforms and intrusively reflow https://www.indium.com/solders/preforms/ 2) Use a selective solder machine on smallest nozzle or Robot with fine tip. Our Versaflow 3/45 can handle the
Electronics Forum | Fri Sep 20 17:43:03 EDT 2019 | deanm
Looks like poor wetting/solderability to me. I don’t see heel fillets on the leads where the solder balls up. The solder has to go somewhere. It won’t flow where it won’t wet. Try printing a bare board and run through reflow. If the solder balls up o
Electronics Forum | Thu Aug 13 18:20:44 EDT 2020 | rgduval
Are you getting the same solder issues on all of the components on the board? Any consistency in the ones that come up with no-solder? Same pins, same orientation, etc? Could be a solderability issue on the component or pads. I hate random issues
Electronics Forum | Fri Mar 25 21:40:05 EDT 2022 | cbeneat
I have a question for the Wave/selective Solder experts. We use a solder bath to Tin the legs of Transformers that are made in house. We use a Marselli BK4. It uses 50/50 solder. The question is, at what temp is best for this solder. Anyone use this
Electronics Forum | Tue Jul 18 00:02:41 EDT 2023 | hazira1991
Yes. i do check all the parameter all seams good. I did compare my solder paste printing and profile with previous lot that did not have any BGA solder short issue which we run at the same line did not have any much difference. During rework also i
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