Electronics Forum | Mon Apr 01 17:20:45 EDT 2013 | davef
In thinking about troubleshooting tombstoning {TS} defects, seek balance: * Pads the same size * Same amount of paste on each pad * Component placed with the same amount of contact on each pad * Heating the same on each pad, no via connection to a gr
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 | Thu Sep 26 16:05:52 EDT 2013 | hegemon
JBC is a great performer, but tips can get a bit expensive. If you are working smaller parts like 0402 and 0201 capacitors, go with the JBC Nano Station. We have 3 stations, each with dual Nano soldering irons. The balance of our stuff is H*kko Fo
Electronics Forum | Wed Nov 13 16:48:19 EST 2013 | spoiltforchoice
I would expect any half decent machine to place 0603 parts slap bang on target to the typical defined accuracy for such parts on most machines of perhaps ~60 microns or better. Self correction during reflow is IMHO much less pronounced with lead-free
Electronics Forum | Tue Feb 04 05:15:40 EST 2014 | spoiltforchoice
Take a look at the ROI tools supplied my MyData and others and draw inspiration from there. Presumably if you are looking at a higher speed line you are looking at higher throughput than you currently achieve or possibly fewer/shorter shifts? The eco
Electronics Forum | Thu May 29 22:06:24 EDT 2014 | proy
Hi You might want to join and post this on my Yahoo Assembleon users group, it is new so we only have 6 or so members, but as it grows it will be more and more useful. My 2c worth is that a sapphire might be kind of old and problematic for support
Electronics Forum | Tue Mar 01 15:42:16 EST 2016 | gregp
Bought a Machine from Tach Shebby at Fastex. It was on a skid at the customers facility ready to ship. I pay Fastex (wire transfer)...three weeks later the machine still hasn't shipped because he is trying to renegotiate his buy price with the owne
Electronics Forum | Tue Dec 19 16:30:23 EST 2017 | charliedci
We have several selective soldering machines, that because of several minutes of process time per PCB, one operator can keep 2 or sometimes 3 machines loaded and running. Other days only 1 machine is running but operator does not have enough time to
Electronics Forum | Thu Dec 20 09:50:44 EST 2018 | stephendo
Once a long time ago I had a board where the cap beside a tantalum shifted in the oven. I phoned our HQ plant and was told that they had the same issue and that it was the tantalum capacitor outgassing. We just applied a dot of glue to the cap. Try b
Electronics Forum | Mon Oct 24 07:15:53 EDT 2022 | umar
Hi All SMT Expert and Members, Any one can help or share how to set the attrition formula at SMT machine pick and place process, FYI, I had a product with high mix low volume with qty running per model is less than 50 pcs, the pcb and place machi
