Electronics Forum | Mon Aug 14 21:57:53 EDT 2006 | davef
For background, look here: * http://www.merix.com/technology.php?section=papers&page=pdf/surface_finish_aug_2002.pdf * http://www.empf.org/empfasis/2006/mar06/lfconversion.html * http://www.omnigraph.com/index1.html?content=/subpages/articles/whit
Electronics Forum | Wed Aug 09 01:58:51 EDT 2006 | tk380514
OK i have a question: I have a prototype BOM and i suggested the customer that we use Paste-in-hole for the 1 connector that they want to use, but its quite high component and not very wide: http://www.molex.com/pdm_docs/sd/022272051_sd.pdf If i u
Electronics Forum | Wed Aug 09 07:32:11 EDT 2006 | mumtaz
The curled legs may push the paste out of the hole, making things messy. This also will decrease your volume of paste which means your solder joints are not as robust as you would like. Also with this process, voiding can be a big issue depending o
Electronics Forum | Wed Aug 09 11:45:25 EDT 2006 | SWAG
We have an OmniFlo 7, 2000 vintage reflow. We are having conveyor problems. I checked the encoder and speed control board and everything is good per tech. manual operations. We removed the chains a couple months ago and thoroughly soaked/cleaned t
Electronics Forum | Thu Aug 10 07:04:41 EDT 2006 | CL
Good Morning SWAG, We have had similar problems with our Heller 1800 EXL's when the chains would build up oil and debris. The only way we could get them clean was to put them into a self cleaning oven and carbonize the residues. We then rinsed them
Electronics Forum | Wed Aug 09 13:30:29 EDT 2006 | dsoohoo
I am searching (though so far unsuccessfully) for an SMT adhesive that I can get in both white and black as opposed to the common red. My company does a lot of work with LED's and the red bonder has a tendency to affect the light output of LED's with
Electronics Forum | Thu Aug 10 10:00:40 EDT 2006 | slthomas
Temp. and humidity levels are dependant upon your chemical (paste and adhesive) specifications. Ballpark I'd say 70�F and 40%-45% RH are good targets, as our paste spec. says optimal ranges are 70-77� and 30-70 RH. As far as air quality, if you bui
Electronics Forum | Fri Aug 11 12:45:10 EDT 2006 | mpm fan
It's been awhile but isn't there a sensor to tell the middle conveyor when it is lined up with the incoming and outgoing rails? If so that would explain why the table goes into Z axis overtravel. It still means your Y isn't working but makes it less
Electronics Forum | Mon Aug 14 11:30:25 EDT 2006 | SWAG
We had centernest to I/O track alignment problems that were not predictable on 3000. Z-axis height seemed good with relation to I/O tracks but y was misaligned. Ended up replacing y-axis stepper and trouble went away. Also have had trouble with z-
Electronics Forum | Fri Aug 11 16:19:39 EDT 2006 | T. Oaks
Hi, We have a issue with current leakage between pins on an SSOP 28 in a low frequency RF application and there is a suspicion that it is being caused by something in the flux residue. We have had the bad boards analyzed and a 'high' Chloride level w
