Electronics Forum | Sun Feb 11 23:32:43 EST 2007 | M.Haris
1. After reflow some boards start producing bumps/bubbles which damage the internal layers causeing PCBs failed in Electrical-testing. How can I eradicate this problem from my assembling process? 2. If SMT components are mounted on non-rigid FLEX PC
Electronics Forum | Tue Feb 27 13:26:53 EST 2007 | jmelson
Does anyone know how wide a doorway you need to accomodate a Philips CSM84? I don't mind taking off covers and accessories to make it a bit narrower, if that will help. The spec sheet indicates the smallest dimension is 53" (1350 mm) which I'm hopi
Electronics Forum | Tue Feb 27 18:26:21 EST 2007 | jmelson
The machine is 2000 miles away, and the eBay auction has not closed yet. I'm working from what pictures and spec sheets I can find on the net right now. If I do win the bidding, I will need to be sure there is an opening wide enough for the machine
Electronics Forum | Wed Feb 28 08:55:03 EST 2007 | John S.
We've been considering adding reflow, MSL, and other "process" specifications to our component drawings. Presently, we have a review process for component compatibility. Does anyone else try to enforce these specs? Has your experience been that th
Electronics Forum | Mon Mar 05 11:24:16 EST 2007 | samir
Something the "placement guys" don't tell the customers... Cpk is an easily "massagable" number. You just take some data points and reduce the variation a bit, or even play around with your spec limits, or a combination of the two to get the highes
Electronics Forum | Thu Apr 05 09:18:14 EDT 2007 | pjc
Please note that pin holes and blow holes are not always defects. The latest IPC 610A Rev D workmanship standard has them as process indicators- depending on Class. I don't have the document handly while writing this. It would be good to look that up
Electronics Forum | Thu Apr 19 11:45:34 EDT 2007 | Cal
Hi PeteB... I dont think you will find any Specs...but that I do not know. What I do know is it depends on the make up of your PCB and Components. Obvious haveing components that may be sensitive to heat the less you want to run or pass through. Re
Electronics Forum | Wed May 09 13:37:07 EDT 2007 | jmills
Greetings Tried to search past threads without an answer. I have a resistor that just fits the between pads. Some of the resisitor were installed without the termnation sitting on the pad and are infact sitting on solder a good .020 to .025 above th
Electronics Forum | Fri Jun 15 09:52:35 EDT 2007 | cyber_wolf
The proper method is to load a flat plate into the X-Y-Z table. The plate size should be as large as the largest board you run. Indicate the entire area of the plate with a dial indicator. I don't remember the exact spec, but try to stay within .2mm.
Electronics Forum | Mon Jun 25 19:36:36 EDT 2007 | bga_kid
If you calculate CFM using the numbers you have provided you are pulling 1396CFM out of the oven. I am not sure what Hellers spec is but I know a Speedline OmniExcel Air machine should be set at 300CFM. I do know for a fact that to much exhaust can s
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