Electronics Forum | Fri May 31 12:50:42 EDT 2013 | spoiltforchoice
Is this a "thermal balance" issue? In the 2nd image you have a group of pads blobbed together as one giant pad. IMHO this is a bad idea, QFN's rely heavily on the magic of your paste and good PCB design to get good alignment. When your solder paste i
Electronics Forum | Tue Aug 20 08:48:07 EDT 2013 | proceng1
If the parts are hand placed and hand trimmed, why do you need to inspect whether the lead is in the hole. The operator should be inserting the part correctly. We have MIRTEC machines and they do a pixel comparison to "known good images". With a m
Electronics Forum | Thu Jun 02 08:18:57 EDT 2016 | emeto
You have to define inexpensive. Good machine will be Juki or Samsung that cost less than Siemens, Fuji or Universal.All of them good in a different way and just like everything else, the more expensive it is the better. If these are expensive you sho
Electronics Forum | Sun Sep 18 10:40:19 EDT 2016 | sarason
First of all do a database or a spreadsheet with all the components and relavant details. Date codes, manufacturer. Abbreviated part no., Full part no, description, Then you can put them online on your own website. You may find a few sales of your de
Electronics Forum | Fri Sep 08 01:08:10 EDT 2017 | tsvetan
The material is 0.12mm stainless steel, electropolished it's thick for fine pitch but we have lot of other big components on the board which do not solder good if we use 0.1mm thickness stencil. The 0.3 mm apretures are big enough and have good rele
Electronics Forum | Sun Apr 05 00:23:53 EDT 2020 | researchmfg
1. To protect the nickel and copper under gold plating from oxidization before soldering. Gold plating can extend the PCB self-life and improve the solderability for 2nd re-flow. 2. Provide a good bonding strength. For Chip on Board process that Gol
Electronics Forum | Thu Jan 07 14:11:08 EST 2021 | dontfeedphils
What is everyone using for assembled circuit board/finished good storage? I'm looking for ideas. Most of my assemblies will have some sort of wire pigtail soldered to one side of the PCBA, so they won't sit "flat", and I'll have a large enough vari
Electronics Forum | Fri Jun 09 15:17:28 EDT 2023 | oxygensmd
I will sell my X5 soon, in September, as my scheduling comes true. Used EKRAs have really good price because they are good printers. I saw most of them between 4000-20000 EUR depends on configuration and vintage. My E5 was around 8k€ 10 years ago, X
Electronics Forum | Fri Sep 22 00:57:44 EDT 2023 | hazira1991
The actual root cause not yet define. But i do check all that you stated all good setting parameter. 1 week before run the problematic batch, i had run another batch which all the BGA were good no solder short. Just recently i run another batch 21 pc
Electronics Forum | Tue Aug 27 16:41:41 EDT 2024 | stephendo
Always be nice with sales reps. They have contact with lots and lots of different people. The best ones know what's what and are willing to explain things. They are not all equal but if you are lucky you will find one that can teach you things or tel
