Electronics Forum | Fri Sep 07 14:51:36 EDT 2001 | Claude Couture
What kind/brand of machine are we talking about? Are the missing parts randomly distributed or are specific to a feeder/placement/pattern? Does your machine remember where to resume placement if you reset it in the middle of a pattern placement? We h
Electronics Forum | Thu Dec 07 19:54:55 EST 2006 | davef
We agree with "guest" above. This a "chip bonder" type material used to improve the reliability of array type devices. "A relative comparison of the N50 values is given below: No underfill = 1.0X (baseline) Corner bond = 1.3X Non reworkable underfi
Electronics Forum | Thu Sep 11 15:23:31 EDT 2003 | Peter L.
I have come across a rash of failed assemblies that have 0805 capacitors and resistors, bottom side glued, wave soldered and washed. Trouble shooter reported touching up the solder joints on a few areas and the boards would pass test. I had a look a
Electronics Forum | Wed Dec 06 21:59:37 EST 2006 | SMTrework
Hello, we rework BGA packages that come back from the field. I've seen on occasion a black and or red "epoxy" substance from the manufacturer on the corner of some board's BGA chips that I imagine are applied to increase corner bond of the chip to th
Electronics Forum | Mon Nov 17 08:01:44 EST 2003 | stefwitt
The format is X,Y Theta of the component center for all placement machines. Gerber data can be useless, unless you have the reference from pin 1 to the component center. Some machines offer a CAD convertion tool. I don't know any machine, which can
Electronics Forum | Thu Nov 27 02:52:33 EST 2003 | Giordano Trecca
I'm using a CIM software (http://www.aiscorp.com/products_npi_circuitcam.htm) to import gerber files and produce pick&place programs and paper/paperless documentation. It's very friendly, useful and fast, but not cheap. I don't know any other softwa
Electronics Forum | Fri May 29 02:08:08 EDT 2009 | cobar
Check that you are getting an even spray pattern from the fluxer.Check that the chip wave nozzle is clean and if possible feed the PCB in to the wavesolder unit at 90 � or 180�.
Electronics Forum | Tue May 26 06:56:40 EDT 2009 | xinxi
Hi! From your post, it seem like the wave did not really touch the component. You probably need to get the both wave height correct and that it hits the component.It is normal for solder to come through the PCB when using chip wave. The through-hole
Electronics Forum | Mon Oct 16 17:46:49 EDT 2006 | Dan
Recently I was given a bad Bios Link from Toshiba which fried my Bios and now my laptop boots to a black screen. I recently unsoldered and removed the existing Bios chip and have ordered anotherfor replacement. Unfortunately while removing, i damag
Electronics Forum | Wed Dec 06 22:46:39 EST 2006 | SMTrework
Hi Dave, This is manufacturer applied epoxy / adhesive to minimize package "lifing" from chassis flexing and thius board flexing. I have seen the complete array area covered with this black or red epoxy in some cases (i.e. the underfill that I've
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