Electronics Forum | Wed May 17 12:08:04 EDT 2006 | Mark
Hello, I have recived from customer PCB where he found that big SMD electrolytic capacitor just fell off. I checked this boards (FR4 , Au/Ni coating). I noticed that all solder remained on the termination of capacitors and looks ok but on the boar
Electronics Forum | Mon Jun 26 12:23:11 EDT 2006 | Rob
Yep, Book a holiday and let someone else sort it out. Otherwise e-mail me and I'll talk you through pallets, rigidisers, printer tooling, spray mount, Kapton tape, local fiducials (panels can strech & shrink) etc. Oh, yeah - for the connectors you
Electronics Forum | Tue Aug 01 12:16:10 EDT 2006 | Vernon
Had a similar problem on a high speed drilling machine. It took 1 month before I found it. In the leadscrew ball nut, there was a guide tube which the balls circulate through. at the end of the tube is a shaped lip. This lip was damaged and the balls
Electronics Forum | Mon Jul 31 10:51:11 EDT 2006 | Chunks
OK so you're stuck with gold. Not all that bad unless you're paying for it. Gold is very flat compared to HASL, so you should have no problems printing. This should lead to good placement as well. But after oven you mat have a big contrast betwee
Electronics Forum | Wed Aug 23 12:14:15 EDT 2006 | jdengler
At a previous job we had a kit to splice the belts. It was a clamping and squeeze device and a soldering iron with a flat blade. You would cut the ends for a suare edge, put the belt in the clamp unit with a small gap. Use the iron to melt both en
Electronics Forum | Thu Sep 14 18:10:12 EDT 2006 | SWAG
Good point Russ but we do builds that comprise of 50 of this and 100 of that. Our high average issue might be around 400 or 500 parts but most are under 100. 20,40,60 flat over-issue gets us set-up and error scrap. 2% of 50 is 1 part. 2% of 500
Electronics Forum | Thu Oct 12 08:12:51 EDT 2006 | realchunks
I have, but not for what you are trying. Different ovens and styles react differently when you try this, so you have to experiment to see how far you can go. Why do you think different temps top and bottom will solve the coplanairty issue? Is this
Electronics Forum | Fri Nov 10 09:09:48 EST 2006 | russ
That is great point John, it definitely gets you closer to apples vs apples. Remeber one time when we were compared to a another Mfgr that made a square box of plastic for one of our customers we made the PCB the fit into that box, we had wires, fi
Electronics Forum | Mon Nov 20 19:49:03 EST 2006 | davef
Sorry for stating this incorrectly. It should been: Bow & twist for bare boards and panels: IPC-A-610 Acceptability of Electronic Assemblies, 10.6: 1.5% for PTH only and 0.75% for SMT, acording to test method TM-650, method 2.4.22 IPC-6012, par. 3.
Electronics Forum | Wed Jan 24 11:22:46 EST 2007 | pr
Do you still have the vacuum plates in? If so, you can set the grid-lok up in the "fixed mode" (not sure what they call it,where it won't set for each board), then you could run without side clamps and the Vacuum should be enough to keep it from movi
