Electronics Forum | Fri Nov 04 22:16:56 EST 2005 | mika
I forgot to mention something about the local fiducial marks: In the "old days" where board stretch was a factor to count with; the use of local fid's around a fine pitch component was sometimes necessary; not to forget that the pick & place machines
Electronics Forum | Fri Oct 20 08:55:48 EDT 2006 | nodlac
Hi Steve- Not being familiar with CS machines as you are...but do you need to use fiducials for a 20mil QFP? If so...OK...just curious. Also, it would be nice to know the reference point that the board designer uses... Board corner, Centroid, part c
Electronics Forum | Mon May 07 16:07:05 EDT 2012 | davef
Start with targets based on the stencil thickness (for height) and stencil thickness times the aperture size (for volume). * Set reasonable upper and lower control limits (+ 25% and –25 % of the targets, for example). * Next, check the printer set-u
Electronics Forum | Thu Dec 06 23:38:40 EST 2012 | sarason
Usually an accident that was perfectly for-seeable, due to a breaking of the rules, or an injury exacerbated by not wearing the appropriate safety gear can kick people along to be sensible. A little pep talk along about doing the right thing after a
Electronics Forum | Wed Oct 02 13:54:39 EDT 2019 | fundomikey
Hello, I have a problem with settings vision for LED (similar to this one: https://www.lumex.com/news/SML-LXIL0603-narrow-beam.html) on JUKI KE3020. The LED is mounted on the side. At the beginning I would like to say that laser recognition is impos
Electronics Forum | Sat Jan 06 11:39:56 EST 2001 | Steve Thomas
On a related note, I'm wondering if any of the newer devices have any way to factor in paste not releasing from the corners, or for that matter, radiused, oval, or round apertures. We have an LSMII, and all it does it let you draw a rectangle around
Electronics Forum | Sat Sep 30 12:14:32 EDT 2000 | jarnopy
Hi Maybe you have too small apertures in stencil. Good apertures size is 90% from pad. And one thing what you can try is that you cut your stencils(blades) aperture corners round (i mean like a oval). I hope that these advices can help you.
Electronics Forum | Wed May 03 10:18:43 EDT 2000 | Stefan Witte
Greg, at least on three different brand machines, I was working on, the offsets rotated with the board. If you start out at 0 deg. and the offset in the top left corner than it is on top right at 90 deg., bottem right at 180 deg. and bottem left at 2
Electronics Forum | Wed Jan 17 20:08:23 EST 2001 | John Dwinell
Hello All, I am looking for any insight RE: reworking the Xilinx 4044XL 40x40 BGA chip. A customer of mine has no trouble removing it, however, when installing with their BGA rework station, the corner solderballs consistently collapse. Has anyone
Electronics Forum | Wed Jan 17 20:33:19 EST 2001 | davef
The corner balls are supposed to collapse, but at roughly the same time as the other balls collapse. Also, those balls are located in the place that isthe easiest to get hot. Think about cranking-up the bottom heat, waiting, and slowing down the pr
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