Electronics Forum | Mon Oct 01 02:51:24 EDT 2001 | haran
What is the main problem in running Mictor connector in SMT? What should be the stencil opening for the through hole lead?Is there any way we can eliminate touch up for the through hole lead as I understand from others that the main problem in runnin
Electronics Forum | Mon Apr 13 12:07:58 EDT 1998 | Tim Velardo
Wondering if anyone has information on percentage of components that we can expect to "lose" during our SMT process. We are new to SMT, using QUAD machines and feel we are losing to many parts during our process. We are spending a lot of touch-up ti
Electronics Forum | Wed Nov 28 07:44:33 EST 2001 | stefwitt
Justin, you will find measuring equipment at http://www.omega.com All sensor signals are in uV or mV and require a signal amplifier. If you get an amplifier with display, you can program a conversion factor for mV to board stretch and it will show a
Electronics Forum | Wed May 08 10:05:42 EDT 2002 | Claude_Couture
Maybe the problem is not the cutter, but the arm that advance the tape in the adjacent feeder gets actuated at the same time as the active feeder. line-up a feeder in pickup position visually, then turn the crank until the roller or feeder advance me
Electronics Forum | Mon Jul 01 22:24:10 EDT 2002 | Por
Thanks for your advise Normally, We do not add any liquid flux (clean or No-clean) during touch up process but this case is an error. Lonco 23F is Nc flux. but our board is clean. However, there are 6 boards that found the white residue and our
Electronics Forum | Thu Jul 18 13:55:29 EDT 2002 | slthomas
Greg, So you mean that on a Class II board with 6000 connections (in our case, the board has about 1800 parts) you would average somewhere in the neighborhood of 540 connections touched up? My gawd, man, what are you building? We'd have to hire ab
Electronics Forum | Thu Oct 31 15:32:33 EST 2002 | slthomas
Whoa, I have (for a long time) been under the impression that lead can only be absorbed via the mucus membranes, not through skin as in the hands. Did I miss something?? Not that I behave would much differently, other than donning gloves whenever I
Electronics Forum | Mon Dec 16 21:34:05 EST 2002 | grantp
Hi, Yes, the stencil does touch the PCB. Is there another method? Sorry to sound a bit dumb on that, however I don't have a lot of experience with automated stencil printing, and manual has been working well up to now with this BGA. Regards, Gra
Electronics Forum | Mon Feb 03 23:55:58 EST 2003 | MA/NY DDave
Hi If this is the tombstoning I know which is evidenced by parts touching each other and some obvious colored material at the edges just wash them again real good. Now you might want to do some IR tests just in case you will have a reliability hit.
Electronics Forum | Wed Feb 26 16:06:34 EST 2003 | slthomas
Something else I just thought of, and MikeK touched on it briefly, is what you'll be cleaning. If you need to be capable of removing both epoxy and solder paste, for instance, you need to look at chemistry and processes that will clean both, and the
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