Electronics Forum | Thu Aug 30 22:36:36 EDT 2001 | davef
While I don't understand why, this topic comes-up fairly often on SMTnet. [That the topic recurs indicates there truely is a problem and I'm just too doopy to understand it.] Several things: 1 Check the fine SMTnet Archives. 2 Some glue suppliers kn
Electronics Forum | Thu Sep 06 10:58:49 EDT 2001 | davef
If your words imaged correctly, it seems a bit strange to have a trace that is wider than the pad where it connects, because we�re used to seeing a narrower trace connecting to a wider pad. It�s tough to determine what the designer was thinking abou
Electronics Forum | Thu Sep 13 17:57:59 EDT 2001 | davef
You're correct. It is curious. Possible angles to look at are: 1 WS609 loves moisture in the air. In high humidity shops, this paste hakes-on liquid. If this is the case, you should also see slumping, resulting in fine pitch bridging, and solder
Electronics Forum | Fri Sep 28 09:30:07 EDT 2001 | kmorris
Just had a similar phenomenon 2 days ago. May relate to your issue --- or not. Like you, I did a once over looking for mechanical obstruction & couldn't find any. Ran a thermal profile on the offending PCB & all checked out. Looked in end of oven
Electronics Forum | Fri Sep 14 15:23:41 EDT 2001 | davef
I saw your earlier postings on the topic, but am not familiar with Print Pro-E Drawings. Have you tried the common Gerber viewers? Like: * View Mate (View only) - http://www.lavenir.com * CamCAD (View only) - http://www.camcad.com * GC-Prevue (View
Electronics Forum | Tue Sep 25 14:38:05 EDT 2001 | nwyatt
1. SRT has been recently calibrated - problem is too many hands in the machine and careless mistakes. The profile is good and has been recently checked by a fellow from Genrad. 2. We are relying on the left over solder from the previous joint and
Electronics Forum | Wed Sep 26 16:32:40 EDT 2001 | davef
Placing a component the correct side up: * May affect heat dissipation. [Umm, that sounds like stretch, but who knows what designers think about?] * Allows reading the markings on those components that have markings, however cryptic the notation of
Electronics Forum | Tue Oct 09 11:50:44 EDT 2001 | Marc Peo
Hello Darby! Mike is correct in saying that reversing the conveyor can be done but the position of the cooling zone would be troublesome. I am guessing that you are looking at a left to right machine that you would like to run right to left or vice
Electronics Forum | Mon Oct 15 10:57:32 EDT 2001 | davef
Before this wave solder pallet salesman blather gets too far out-of-control, let�s stop for a minute. The three major approaches you have are: 1 SELECTIVE SOLDERING: Using: * Specialty wave soldering machine to solder specific areas of a board * P
Electronics Forum | Thu Oct 25 16:48:29 EDT 2001 | Cemal Basaran
We can inspect and measure strain field in anything larger than 320nm with Laser techniques we have. We can do this measurements during fatigue testing. Of course thick intermetallic region as a solid region is a problem due to the fact that you ha
