Electronics Forum | Tue Mar 07 14:03:45 EST 2006 | slthomas
The cheapest method I've found to measure anything in that size range is a reticle for a stereo microscope. I don't remember the resolution but it was 2 or 5 mil, I think. It's not rocket science but it's a nice tool for small scale measurements tha
Electronics Forum | Tue Dec 02 07:56:40 EST 2008 | realchunks
Wow, rocket science with Nasa specs! I like it. I don't see the trick question here, so I'll continue.... IPC simply states over hang of round or flattened (coined) leads is acceptable (class 1, 2, & 3) if it "does not violate minimum electrical c
Electronics Forum | Tue May 17 01:32:34 EDT 2022 | sarason
Another method would be to do a screen dump on a Juki 2070,2080 machine, but that gets you back to the chicken and egg scenario. My program PCBSynergy doesn't reverse out the board file from a machine file while Ealead does . Also the programs EPU, F
Electronics Forum | Wed Nov 29 10:50:24 EST 2000 | blnorman
Vacuum casting (same process used to make solid rocket motors) should remove any air from the paste. We had thought of pressurizing the tubes to remove the residual paste, but that would entrap air. The problem of tubes sitting out for different
Electronics Forum | Thu Feb 22 20:53:44 EST 2001 | davef
You're not sposed to pull the mask from the BGA when reworking it!!!! ;-) Well, if you insist. You can be as fancy as you want. Basically, all you need to do form a dam to prevent the solder from flowing from the pad to the via and starving the
Electronics Forum | Thu May 16 15:05:20 EDT 2002 | Hussman69
No need to make rocket science out it. Buy an AOI mchine. If that's too expensive, scrap a board to use as a sample. Can't do that, use a digital camera and snap a couple pix of a good board and make some kick ass work instructions to use. Can't
Electronics Forum | Wed Aug 07 08:46:38 EDT 2002 | davef
The time and temperature required for baking moisture from your boards varies according to the conflicting desires to: * Remove enough entrapped moisture. * Desire to retain solderability of solderable surfaces. Search the fine SMTnet archives for s
Electronics Forum | Fri Mar 04 17:19:31 EST 2005 | davef
Mrduckmann2000: Why do you want to do this? * Removing a non-washable / peelable temporary solder resist [TSR] is going become very tedious, because they do not release well from small / tight / isolated features. * Clay from washable resists will
Electronics Forum | Mon Aug 21 08:34:09 EDT 2006 | Chunks
Larry, You always seem to twist things back to your wave solder process, ya nut! Anyway, why over simplify things when you are trouble shooting a process? The K.I.S.S. process was invented by your generation so I thought you of all people would l
Electronics Forum | Fri Oct 12 14:46:56 EDT 2007 | chef
All- good points and to be clear not all is in fun and jest. I support ROHS for the environmental issues. Get the lead out is my mantra, there's alot to consider for sure. I prefer to migrate that way, in time. Most my jobs are ROHS already, just a f
