Electronics Forum | Tue May 14 02:01:56 EDT 2013 | leeg
We are having numerous issues placing BGA and IC's on a Juki 750 using laser, the machine has been recently calibrated but we are getting twist and misplacement quite often, any ideas?
Electronics Forum | Tue May 19 13:53:53 EDT 2015 | dyoungquist
Parts will self align using Pb free paste as well. If your parts are not self aligning with Pb free paste, you have a problem with either your paste or the oven profile you are using.
Electronics Forum | Fri Aug 04 05:10:57 EDT 2000 | Dougie
Hi, We use a mixture of plastic tape carriers and paper tape carriers for placing chip components. We are experiencing a problem which I know is a problem across the industry...when using the plastic carriers, the chip components stick to the tape c
Electronics Forum | Wed May 17 03:56:20 EDT 2000 | Wolfgang Busko
Avichai: What kind of PCB are you using, when do you detect that shift (right after placement, before reflow, after reflow), does the shift always appear to be the same or do you see a variation, are you able to identify the process-step where it hap
Electronics Forum | Wed May 17 12:22:54 EDT 2000 | JAX
Ramot, Without further explanation everyone here is just taking stabs at it..... Sounds normal, I'm game! Have you looked at board finish(HASL?)?? Measured paste height?? Are they always off in the same direction? If not, Handling?? What are the sp
Electronics Forum | Fri May 05 11:11:05 EDT 2000 | Stefan Witte
The placement defect rate also depends on the shape of the components. 0402's have a higher defect rate than 0805's for example. If the board is very dense populated, chances are that a misplaced part knocks off another part and all of the sudden the
Electronics Forum | Mon Sep 10 16:07:37 EDT 2001 | johnw
Hi guys HELP!!!!!!!!!! I have been tasked with working out a chart to show calibration acCuracy and that my machines are in control I say to myself I know they are cause I have no misplacement of fine pitch but this is not good enough for my co
Electronics Forum | Thu Mar 14 23:20:05 EST 2002 | alanwilson
Missing and misplaced components could be down to board supports set too high or too low. Check the ZO and make sure the deflection is set ok at various points across the board. Check the other usuals such as sticking nozzles, correct size nozzle for
Electronics Forum | Tue Nov 30 17:26:41 EST 2004 | donb
Thanks for the advice folks, but we only have one Fuji Engineer in Australia, and he is in Asia for training. I haven't looked at the machine yet, but am told it is misplacing small parts. It may only be the camera that needs calibrating, but I won't
Electronics Forum | Sun Mar 25 12:21:35 EDT 2007 | diesel_1t
http://www.freescale.com/files/32bit/doc/package_info/AN2920.pdf hopefully this help you. also we always look on X ray for some misplacement; you can see like a dark circle and another lighter circle with an offset between both circles (meaning dar
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