Electronics Forum | Tue Aug 04 14:28:39 EDT 2020 | ttheis
Yes, I am certain it is 240 corner grounded delta. It confuses many electricians and it took me some time to understand. It is fed from a 480:240 delta 200A transformer. As I mentioned, they have a lot of Bridgeport 3ph machines and cnc machines conn
Electronics Forum | Tue Sep 03 14:34:39 EDT 2002 | dragonslayr
All valuable insights are provided by the other posters to this thread. I'd like to add a bit more, if I may. Being environmental friendly is a must. I would not advocate dumping toxic metals to the sewer. In a past worklife, a steel mill, I was r
Electronics Forum | Fri Oct 18 17:04:38 EDT 2002 | ereno
We have a connector mfg that claims that their design is good and does not contribute to the problem that we are having. The problem is evidence of poor soldering. All other components that surround this connector have very good solder joints, with t
Electronics Forum | Wed Jun 06 16:00:24 EDT 2012 | davef
I’ve used “QI Macros SPC Software for Excel [http://www.qimacros.com/excel-spc.html ]“ It is very easy to use. Here's a step-by-step development of a run chart * http://peltiertech.com/Excel/Charts/RunChtLines.html * http://elsmar.com/pdf_files/p%
Electronics Forum | Mon Oct 19 13:40:45 EDT 2020 | johndep7
I have seen a post or two about this but I haven't found a definite answer. My company recently has had random batches coming out of the Aqueous Wash with grey/dull solder. This has been an ongoing issue, we have replaced basically everything in the
Electronics Forum | Thu Nov 16 06:13:16 EST 2000 | Adam Seychell
I am currently building a home PCB etching tank based on the ammonia/ammonium sulfate chemistry. The etching system consists of a etching tank, and an electrolytic copper recovery tank. The result is a infinitely replenishable etching system without
Electronics Forum | Thu May 20 11:55:04 EDT 1999 | Parvez
hi everybody, We've been doing some studies on assembly of CSPs. We assembled these packages on micrivia-in-pad patterns. These are 15/13.5/11 mil pads with 6 mil design microvia, using photo/laser/plasma tech. We are seeing voids, as big as the micr
Electronics Forum | Sat Jan 23 09:36:35 EST 1999 | Parvez Patel
Hi Everyone, We plan to build, for reliability/experimental/research purpose some CSPs (namely Tessera microBGA 46-I/O 0/75mm pitch and TI 64 I/O 0/8 mm pitch). the various factors that we plan to evaluate are the reliability and assembly concerns fo
Electronics Forum | Tue Apr 07 17:17:46 EDT 1998 | Steve Gregory
| I was at the Southcon show in Orlando and saw a PCB depanelization machine which was basically a rotary saw which cut through the scoring on the panel. I don't remember the name of the company though so I can't get any info on this. Does anyone k
Electronics Forum | Fri Feb 13 12:53:09 EST 1998 | Energy Technology Systems
ETS, Energy Technology Systems, would like to prove the capabilities of the CUREFLOW System (Solder Reflow and Curing Ovens)to you first hand. If your company is in the market to purchase a new reflow oven and would like to make that purchase ris
