Electronics Forum | Fri May 17 15:51:32 EDT 2002 | davef
First thing that comes to mind is that your �dip & look� testing at 240�C clearly doesn�t represent the in-use application of 215�C. So, what are the test results at 215�C? Other questions are: * Can we assume that the solderability of other compon
Electronics Forum | Fri Jan 24 09:04:54 EST 2003 | russ
How are these connectors and dips oriented? If the leads are parallel as opposed to perpendicular to to the wave this can promote bridging depending on spacing and length. The long leads showing icicling are most likely either inadequate heat OR the
Electronics Forum | Wed Feb 12 16:23:30 EST 2003 | russ
I agree with DDave, You have something else wrong! .100 dips with .05" lead protrusion should not bridge (in fact I would think that it would be almost impossible). Tell us about your machine, (laminar flow, A-wave, etc.., size of nozzle, wave heig
Electronics Forum | Wed Jun 11 19:20:12 EDT 2003 | slthomas
Clearly someone from the equipment side will explain to me why this is an oversimplification, but what is the difference between providing support to the purchaser of second hand equipment and the guy that bought it new, assuming they're paying the s
Electronics Forum | Fri Aug 08 08:34:28 EDT 2003 | mleber
Problem areas are always ground connections. 20 pin dips have great flow on 18 of 20 pins, caps have poor upflow on the ground side only etc. That's my problem. 90% of the pwb looks great. Bottomside - awesome. Ground connections do not meet the 75%
Electronics Forum | Wed Oct 01 13:39:13 EDT 2003 | arturoflores
They take the solder in a dip and look solderability test but when in normal reflow process we got some pins that do not get wet and the appearance is as follows: -Pillow effect on the toe(no front fillet is formed) -There is a sheet of flux between
Electronics Forum | Wed Nov 19 16:35:27 EST 2003 | davef
We'd be incluned to dip the BGA ball in tacky flux, place the BGA on the PTH interposer, reflow that suka, and get on with things. [Take the people involved out to lunch with the money you save on not buying a stencil.] On damaging the glop top, we'
Electronics Forum | Sat Aug 14 21:31:31 EDT 2004 | Daveylau
I'm currently working in a SMT factory in China. I'd like to know what preparation that I would need to change from leaded to lead free soldering. 1.Starting with the PCB production, things that I need to concern about are solder mask, Cu protection
Electronics Forum | Mon Sep 27 10:56:01 EDT 2004 | grayman
First, for new stencil-you must ask you stencil dealer to put the markings before shipping it to you. Second, for old stencil-you buy some old angle bar or any metal plate about 1 inch by 1 inche. you engrave the markings on that plate and screw it
Electronics Forum | Wed Oct 20 15:58:09 EDT 2004 | chezm
Hi, I am looking for someone to repair my Universal Digitizer/Programmer model 6892. I can not get the "@" sign after loading the GEN.exe to UIC and also the X,Y display, over the digitizing table is blank. I think, there is a hardware issue. An
