Electronics Forum: problem (Page 661 of 1311)

Hardware for ROHS builds

Electronics Forum | Fri Nov 03 15:51:48 EST 2006 | gcolbert

Hi all I'm gathering Manufacture part numbers that are ROHS for a future build and ran into a problem. The hardware (nuts and bolts for heat sinks, etc. is not ROHS. Does anyone know a harware manufacture that carries ROHS parts. I talked to McMaste

Lead Free paste

Electronics Forum | Tue Nov 07 15:08:59 EST 2006 | russ

here are my thoughts on kester, I have rec'd a sample to qualify here and we cannot even get it out of the cartridge it is so dryed out. Rep informed me that Kester has a problem with its chemistry right now. Product is Mfgr'd in off shore location

Lead Free paste

Electronics Forum | Mon Nov 27 10:19:52 EST 2006 | Earl Jr

Jeff, I suspect you are just the guy running the line. The things you asked are not anything out of the norm. Go into your manufacturing engineering's office, grab that video game out of their hands and tell them you're not giving it back to them unt

"Gap" in completed solder joint between lead and pad

Electronics Forum | Thu Nov 30 16:14:33 EST 2006 | darby

Maybe ask your customer where they got this idea from? It is possible they may have even got this idea from some white paper or article where they are trying to explain something else and show drawings with no solder between the pad and lead. It may

Smt 'pick and place' machine issues

Electronics Forum | Wed Nov 29 00:26:39 EST 2006 | mack3000

Hello everyone, I've been facing some issues regarding:- 1)missing components 2)overturn 3)misalignments Why does this occur?Is it because of the machines?The programming?Or handling issues? What steps are needed to be taken to counter this problem

Solderbridges wave soldering

Electronics Forum | Mon Dec 04 20:11:45 EST 2006 | billwestiet

Lots of answers, but none to the question you asked. I don't know of any ppm standards, none would be a good place to start. If you have a particular re-occuring problem with a specific connector or location, e-mail me. bill@ietechnology.net Is t

ENIG-BLACK PAD!!!!

Electronics Forum | Thu Dec 21 22:17:42 EST 2006 | davef

Waving the board will sweap away the crud of black pad and to produce a solderable surface, but this surface may have too much solder and may not be very flat. This can create problems when printing paste and placing and soldering components, depend

BGA rework with unplugged vias PCB

Electronics Forum | Thu Dec 21 13:33:46 EST 2006 | ppcbs

The problem with super glue is that is has a cyanide base that turns into a toxic gas and evaporates when heated. See IPC-7095. Via's should be fully plugged with solder mask at the fab house. If your PCB designers are not up to speed on IPC requi

Streaking at Screen Printing

Electronics Forum | Fri Dec 15 07:40:40 EST 2006 | kvanzill

Thank you for the suggestions, I did change blades and we did try another printer, problem still exists and it is across several different products but only that line. One thought is aperature size since we over print for other reasons due to part d

Foam Fluxer problems

Electronics Forum | Mon Dec 18 12:17:17 EST 2006 | russ

Real tough to foam that no-clean formula there. Most no-cleans are notoriously difficult to foam. I assume that you have both a pressure and a flow regulator. low pressure and high flow are keys to fowm head height as well as S.G. also make sure


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