Electronics Forum | Tue Mar 13 19:27:33 EDT 2018 | maustin
I have an old Zevatech 740 machine that, until recently, was running well. In the last few weeks, the RH head has started giving me issues. When it picks up a component (and early on in most of my programs it will be picking up chip resistors or ca
Electronics Forum | Wed Dec 21 17:11:47 EST 2005 | Mike Dolbow www.atotalgps.com
Has any one considered the melting eutectic of the plated part verses the eutectic of the paste it self. Inter metallic solids can form when mixing metals. Thus this causes solder joint reliability. Also a lot of vendors are putting out pure tin prod
Electronics Forum | Thu May 06 18:06:43 EDT 1999 | JohnW
| | Can anyone pls email me a typical temperature profile for wave soldering process. | | | | Thank you vey much. | | | | rdgs... | | | Typical depends on the processes you're developing. | | Key factors in my experience are flux type and requi
Electronics Forum | Thu May 06 18:07:59 EDT 1999 | JohnW
| | | Can anyone pls email me a typical temperature profile for wave soldering process. | | | | | | Thank you vey much. | | | | | | rdgs... | | | | | Typical depends on the processes you're developing. | | | | Key factors in my experience are f
Electronics Forum | Thu Feb 27 15:13:35 EST 2003 | stockley
Oh dear, I tried not to respond but i couldn't help myself. Stop me if I go off into the woods. My guess, Chris, based on your fleeting reference to GF files, is that your SMT machines are Siemens Siplace. If this is so then package orientation def
Electronics Forum | Mon Nov 06 10:29:28 EST 2000 | Dean Stadem
All of the replies have merit. Here is another one. Because the cause of the tombstoning is wetting forces that are imbalanced, and one end wets faster or more readily than the other, the 0402 lifts up on that end easily because of its low mass. Incr
Electronics Forum | Tue Oct 24 12:20:35 EDT 2000 | JohnW
Adam, Did some work on this a bit back via some good old Taguchi DOE and like Dave(the guru)F say's your component terminations is a big factor but I also foundthat the amount of flux you put on as well as the preheat's has an effect, generally we f
Electronics Forum | Mon Feb 26 19:56:24 EST 2001 | davef
SMTnet Archives used to have copious amounts of information on a pin-in-hole [e.g., pin-in-paste, paste-in-hole, etc] reflow process, but much of that appears lost with the conversion to the new and improved site format. In getting started, check:
Electronics Forum | Tue May 08 19:28:29 EDT 2001 | mparker
Received my copy of the standard about a month ago. Seems straightforward and gets away from the percentage nightmare. Mark Twain said it best with "There are 3 kinds of lies in this world - lies, damn lies and statistics!!" Now I have some nagging
Electronics Forum | Thu Oct 14 18:02:31 EDT 1999 | JohnW
Bryan, 0402's tombstonning isn't that uncommon and usually the 1st reaction is alway's the pad size aint right. If you've followed the IPC guidline's normally you should be fine but I'd double check the component supplier's spec's as well. brian's p
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