Electronics Forum | Tue Apr 17 08:54:09 EDT 2001 | davef
Process capability indices are pretty well documented. Consider: 1 A good general SPC book like: Statistical Quality Control; EL Grant & RS Leavenworth; Mcgraw-Hill; ISBN 0078443547 2 Other good books are: Statistical Process Control For SMT; WS
Electronics Forum | Mon Jun 25 20:35:44 EDT 2001 | davef
According to J-STD-004 "Requirements for Soldering Fluxes", fluxes are classified by their chemical composition, activity level and halide content. In this scheme, each flux type is identified by a 4-character designator, where: * First two character
Electronics Forum | Thu Mar 02 09:23:05 EST 2006 | Bob R.
I never understood the statement "process indicator". The 7095 committee used that wording but didn't explain it. Other than really unusual cases such as champagne voiding, BGA voids are not a reliability issue. A half dozen studies have come to t
Electronics Forum | Wed Nov 15 09:11:58 EST 2006 | sliebl
Thanks for the info, Paul. Not being familiar with the Mydata machines, I'm not sure how you can't have the problem of running out of feeder room? Once my machines are 'full' of feeders, I can't fit anything else on them and need to split programs a
Electronics Forum | Mon Dec 18 04:03:30 EST 2006 | greg york
Good solvent wipe will normally show some discoloration of the same colour as resist, but not scientific enough as you cant gauge the amount coming off, ideally none. But is an indicator of the issue. I have been meaning to do a swab with an indicato
Electronics Forum | Fri Jun 15 09:52:35 EDT 2007 | cyber_wolf
The proper method is to load a flat plate into the X-Y-Z table. The plate size should be as large as the largest board you run. Indicate the entire area of the plate with a dial indicator. I don't remember the exact spec, but try to stay within .2mm.
Electronics Forum | Wed Jan 23 08:41:42 EST 2008 | operator
Actually we don't have local fume extraction at our soldering stations. We have 4 going at a time. I was researching last night and found this website. http://www.engineeringtoolbox.com/air-change-rate-room-d_867.html It indicates 10-15 air changes p
Electronics Forum | Fri Jul 09 19:20:49 EDT 2010 | rway
This table, is it in a database? And is it indicating the number of component, solder insp. etc based on one board or one panel? It needs to be based on the total number of inspection on your panelized pcb. The equation works, you may just be look
Electronics Forum | Mon Sep 20 14:15:32 EDT 2010 | dekhead
"System Suspended While Cover is Opened" indicates front or rear cover opened; not the head being raised. Therefore there is an issue with one of the cover interlocks not being made properly. Note there are 2 switches on each (NO and NC) one goes int
Electronics Forum | Wed Feb 16 12:47:58 EST 2011 | dennisfo
I've been here approx. 3 months. It was indicated that Xylene has alwas been used but it was never indicated that bubbles were not present in the past (ignored or touchup). I have a sample of Humiseal 73 thinner ordered for testing. We've been thinne