Electronics Forum | Fri Mar 22 09:22:44 EST 2002 | itempea
Steve, don't forget that the first assessment you should make is whether a CP6 is what you really need. It's highly reliable, fast, but no so flexible. For a low volume, high mix, it might not be your best bet. Other things to consider: - the exper
Electronics Forum | Mon Apr 01 15:46:35 EST 2002 | stepheno
Do you have double "sign-offs"? I.E. two operators look at each reel that gets changed? That helps a lot. One place I worked had labels made up that had the operator put down what the part was and the time and two sets of initials. What I have nev
Electronics Forum | Tue Apr 09 08:49:43 EDT 2002 | davef
Hey Bud. Allow me to 'turn' your point about 'grain structure' just a bit. Fast cooling rates / coarse grain structures was a bit of red herring in the early 80's. Faster cooling DOES produce finer grained solder connections. Accelerated testing of
Electronics Forum | Thu Apr 11 04:03:28 EDT 2002 | mwoodall
The Alpha metals Hi Check 500 is used to measure paste deposit thickness. The paste height is found from a micrometer reading determined by focussing a beam of light on a track adjacent to a paste deposit and then onto the solder paste. I've measure
Electronics Forum | Thu Apr 11 19:06:59 EDT 2002 | tmarc
We are using 1mm pitch BGAs with a great quantity of via(s) under the component. Very shortly we will be placing CSPs with .65mm pitch. Our via(s) are solder masked, however we generally have a percentage of them that the masking is thin enough that
Electronics Forum | Sun Apr 14 14:13:25 EDT 2002 | davef
I assume you're looking at stencil fab equipment because you need 'faster turns' than you can get from available stencil suppliers. While you're assessing this, consider other alternatives, such as: * Dispensing paste. [A very funny SMTNetter, livin
Electronics Forum | Thu Apr 18 09:30:30 EDT 2002 | davef
Brian, Such a deal, how could you NOT take it? Two comments: * In the words of our ex-president Wild Bill, �Ah feel yer pain.� * TANSTAAFL [There Ain't No Such Thing As A Free Lunch] from RA Heinlein's �The Moon is a Harsh Mistress� That being s
Electronics Forum | Mon Apr 15 18:59:12 EDT 2002 | davef
Points are: * Seminal study is: "Evaluation of Low Residue Soldering for Military and Commercial Applications: A Report from the Low Residue Soldering Task Force," published by Sandia National Labs in June 1995. Look here http://www.smtnet.com/forums
Electronics Forum | Sun Apr 28 07:34:34 EDT 2002 | hany_khoga
Dear Tom : I hope I �m not too late. We produce PC motherboards with some buses exceeding the speed of 100MHz . we use no clean flux and it is OK even with the residues you can see under a microscope. But according to our own experience through a mo
Electronics Forum | Wed Apr 17 21:02:00 EDT 2002 | ianchan
Hi mates, back over at our side, bad service is not only prevalent in the machine service industry, it occurs even in esteemed department stores and restaurants...etc. only in recent years has our local government revamped the quality of service, s
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