Electronics Forum | Fri Jun 10 12:11:49 EDT 2005 | chunks
QS and ISO can really play a part here. If so, the best way I found was to run parallel T-couple ports to the thermocouples of the oven. Now you can run a board and gather all your thermal information and set your temps. Now use parallel ports to
Electronics Forum | Mon Jun 13 07:44:15 EDT 2005 | bandjwet
Peter: Based on our company's experience with removing a variety of different coatings, including parylene, the BGA's can be removed. We would use a chemical etch followed by a neutralizing process. We would then reflow the devices and pry them off
Electronics Forum | Fri Jun 03 15:18:04 EDT 2005 | mmjm_1099
Hello, I was wondering about specs on SMT stencil ordering. I am looking to make some sort of template for aperature layout of some parts. I was wondering some issues that you have all came across or made to change to better suit your boards. For ins
Electronics Forum | Fri Jun 03 16:40:48 EDT 2005 | Andrea
I have a customer who has put a restriction against pure tin finish components. We have gotten our BOMs compliant with all but 5 parts. Fairchild p/n FDD6512A, FQD12N20C, IRLM120A Bournes 3214G-1-501E Sprague 10TS-D10 I am looking for a standard pr
Electronics Forum | Thu Jun 09 09:08:09 EDT 2005 | russ
It's normal for us when we review design. We have found that in the Y axis we need .015" whereas in the X axis we can use .005" spacing. this relates to our nozzle size vs. pickup skew etc... This wouldn't apply if there are parts taller than XXX
Electronics Forum | Thu Jun 09 08:37:49 EDT 2005 | james
Just wondering if anyone else out there has been able to reduce Set-up time on SMT Machines. We are a contract manufacturer and run several different models in one day on 4 different machines. We currently have 40-50% downtime due to set-up time.
Electronics Forum | Mon Jun 13 09:17:05 EDT 2005 | russ
Some machines may require that the two locals be used to calculate a center point where some (probably most) just use them as a second positional identifier. The fiducials are programmed as just XY and just prior to placement the machine will read th
Electronics Forum | Wed Jun 15 00:33:11 EDT 2005 | Frank
You didn't state if you are using all CAD data or not. If you are not using any CAD data then all bets are off. If you global fid XY data and all your placement XY data are all from CAD data, but you are manually teaching your local fids, then they
Electronics Forum | Tue Jun 14 15:03:15 EDT 2005 | slthomas
In that the machine times out and waits for a feeder refill and doesn't just skip that part and leave the space empty, it's not a defect. I have found 500ppm *fairly* easily attained in SMT depending on the board mix and how you define (1) a defect,
Electronics Forum | Thu Jun 16 22:14:51 EDT 2005 | davef
16 thou pitch parts: Use a 5 thou laser cut electropolished stencil with 0.008"x0.045" apertures and type 3 solder paste. Bridges Connecting or Partially Connecting Adjacent Leads or Lands * Excessive solder paste * Excessive component placement pre
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