Electronics Forum: in slight (Page 1 of 4)

Losing parts in reflow

Electronics Forum | Wed Jun 13 16:09:28 EDT 2007 | rgduval

The parts were soldered in place on the first side. Any recommendations on material for this kind of fixture? I've shimmed boards off the belt before with titanium wave plows...but, I'd love to find something slightly more elegant.

Paste in hole question

Electronics Forum | Mon Aug 18 15:18:08 EDT 2008 | realchunks

Open the same size as the via's anular ring. Any slight off print will wet its way back into the via hole.

Bubbles in Conformal Coating

Electronics Forum | Tue Feb 03 11:42:54 EST 2009 | lmartenson

We use PVA and I have had bubbles that came from the pressure in the pressure pot being to high. Also the material filter was slightly clogged. I'm not sure of your setup hope this helps.

Voiding in uBGA's w/blind uvia's in pads

Electronics Forum | Sat Nov 24 22:15:16 EST 2001 | Glenn Robertson

Tony, I'm not sure if even baking will stop the voids if you have gaps in the plating. It probably doesn't take much moisture or even trapped air. I'm not speaking from a lot of direct experience here, so please run the tests and let us know wh

Component Loss in CP643

Electronics Forum | Tue Sep 27 15:57:43 EDT 2005 | stepheniii

Ceramic caps are denser than most other components and I"ve found the tops can be slightly rounded. You may want to slow down the turret speed for some parts. Do you ever get a location where there should be a part but there is not? If the part fly

Component Loss in CP643

Electronics Forum | Wed Sep 28 10:39:40 EDT 2005 | stepheniii

I didn't mean where the vision looks. I meant where the nozzle meets the component. I"ve seen a slight doming of these components. Although now that I think of it, Fugi nozzles would be less affected than some other machine nozzles. Assumming a syme

Pin in Paste assistance

Electronics Forum | Tue Dec 15 09:26:37 EST 2020 | stivais

Have you tried cutting the leads shorter (or lift the connector slightly) so that they barely protrude at the other side of the PCB? Just for testing purpose, for mass production you should find a connector with shorter leads then. This should help w

Trace Elements in Solder

Electronics Forum | Wed Jun 26 11:13:09 EDT 2002 | robbied

Can anyone help? Our Solder bar suppier is discontinuing the Sn63 Pb37 solder that they currently supply us. Another company has offered us a 'direct replacement' which is their own Sn63 Pb37 solder bar. The only problem I have with this is that the

Porosity in Good Plating

Electronics Forum | Tue Jul 08 20:43:03 EDT 2003 | davef

AlCapone: We have an understanding similar to yours, but slightly different. * At 230*C gold dissolves in to solder at the following rate: 63/37: 197 uinch/sec [5 um/sec]. So for a typical ENIG solderability protection, the gold is gone in about a s

Component Loss in CP643

Electronics Forum | Wed Sep 28 01:32:15 EDT 2005 | Mika

Try vision type 12 for capacitors, this will give you much better acceptance in the vision inspection, since those are slightly rounded. Resistors works normally fine with vision type 10. If you have a component that is very hard to get pass the visi

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