Electronics Forum | Fri Jan 16 23:46:38 EST 1998 | Scott
| I have a problem! The solder on my pc boards look great comeing out | of my reflow oven. They go thrue the rest of the prossese | and at the end at the qc station it's cold or whitish or gray not shiny. | does any one have a idea on how to correct
Electronics Forum | Thu Feb 28 07:57:52 EST 2002 | caldon
Marcos- BGA's and soldering manually is difficult. Typically soldering BGAs requires reflow just as a reflow oven does, so I recommend a rework station. Go to http://www.empf.org/html/empfset.htm and download Jan 2002, Dec 2001, Sep 2001, Aug 2001,
Electronics Forum | Sat Apr 20 03:04:23 EDT 2002 | yngwie
I've just got a job in a new company and my 1st assignment is to draft the High Mix Low Volume Implementation plan. Currently this company is under a massive JIT process. It is impossible to balance capacity in a non-repetitive high-mix manufacturing
Electronics Forum | Wed Jun 05 17:14:40 EDT 2002 | davef
First, I suggest that people search the SMTnet Archives in just about every response that I make. Second, you need to work on your DOE jargon * Factors. Independent or input variables * Effects. Results. Dependent or output variables. Third, the
Electronics Forum | Wed Jul 10 22:45:06 EDT 2002 | davef
A field meter would be nice. Suppliers are: http://www.sar101.com/cpf/handheld.htm We like: M265, Stat Arc II [Monroe Electronics, 100 Housel Avenue, Lyndonville, NY 14098 800-821-6001]. It would be good to words like 'chopper stabalized' in the d
Electronics Forum | Tue Sep 03 22:32:04 EDT 2002 | davef
Naw, alcohol and solvents won't do dip. Hold-off on: * Destructive testing. [Athough this will convince you to move on to other things.] * Rework of the solder connections. [Although this will correct the problem.] Consider investigating your aque
Electronics Forum | Thu Oct 31 08:39:35 EST 2002 | Jim M.
There is an old saying that i try to follow called "Your Price is too high" "It's unwise to pay too much, but it's unwise to pay to little.When you pay to much, you lose a little money, that is all. when you pay too little , you sometimes lose every
Electronics Forum | Sun Dec 08 22:20:39 EST 2002 | grantp
Hi, We have been manufacturing a PCB, however it's been quite tricky to profile, as the edges of the PCB are reflowing before the center of the PCB. I have looked at the design, and there is a small power plane for 2.5 Volt in the center of the PCB
Electronics Forum | Wed Feb 26 17:05:42 EST 2003 | davef
Q1: Are the markings on resistors the actual value? A1: Generally, resistor marking indicates the value of the device, where the first two digits are the value and the third digit is the multiplier. Q2: Do AOI machines look for these markings or do
Electronics Forum | Tue Mar 04 18:05:03 EST 2003 | msivigny
Hello Maribel, One way you justify the use of an AOI is to calculate how many defects the system will potentially detect before reflow, associate a repair cost per defect and make the calculation. For an AOI to be effective in this regard, it must sc
