Electronics Forum | Mon Dec 06 10:26:56 EST 1999 | Dave F
Yins: We all use "Mnemonic" words or phrases to help in remembering facts. As part of our on-going training, we're trying to use a mnemonic to help people remember the resistor color code. Certainly, we "sailors" learned one that doesn't fit wit
Electronics Forum | Fri Dec 10 08:58:19 EST 1999 | Dave F
Glen: Thanks for the clarification. I agree with Wolfgang that fluxer setup could be the source of the problem. Bottom-side wave solder shorting has a fairly wide range of potental causes. For instance slow conveyor speed can produce the same con
Electronics Forum | Mon Dec 06 17:17:57 EST 1999 | Brian W.
I have not used a vision inspection system for this. We used a digital x-y coordinate measurement system. With this, we could find the center of the part and then measure where it was in relation to a fixed point, like a fiducial. Some of the syst
Electronics Forum | Wed Nov 24 11:38:42 EST 1999 | John Thorup
Hi Wade As Steve says - are you sure that the lead is in solution? Particulate lead like solder balls is much easier to remove. The answers are going to depend on total output in gallons, maximum flow required and what has to be removed. If you're
Electronics Forum | Fri Nov 12 10:20:53 EST 1999 | Wolfgang Busko
Now an than I hear, read about the same thing but without mentioning specific frequencies. It�s something that worries me in the back of my mind but not in actual daily workflow. Our boards go up to 50Mhz with digital bus systems and are made with no
Electronics Forum | Thu Nov 11 18:39:06 EST 1999 | John Thorup
Assuming that you are going to solder them into a board rather than socket them, yes. The thickness of the gold plating in this application will usually make up a large enough percentage of the total joint to threaten enbrittlement. Use a small sol
Electronics Forum | Tue Nov 09 11:32:32 EST 1999 | Dave F
Wolfgang: "Our desire is to get what we design" ... Wanting to get what you ask for ... ummm sounds like a risky proposition!!! ;-) Two things: 1 Go to the Hadco site and get their "boiler-plate." Use it and some of the Earl Moon specs in the SMTn
Electronics Forum | Thu Nov 04 13:53:12 EST 1999 | Clifford Peaslee
Eric, You can connect NT systems together with little problem, using ethernet network cards with twisted pair cables and a hub. The only expense is the NT operating systems. NT also has a personal web server, so you can have your own Intranet. For y
Electronics Forum | Mon Oct 25 16:12:52 EDT 1999 | Joe
Dave: Thanks for the info, I appreciate it. You start off by naming a +/- 2 sigma process, is that equivalant to an AQL of 0.25 ? What is a 6 sigma equivalant to? You mentioned the AQL at incoming inspection, what should that be in relationship to
Electronics Forum | Wed Oct 20 19:36:45 EDT 1999 | Dennis O'Donnell
Hi Mark: Running a wire under a BGA is possible, however if you plan to mount the BGA over the wire you would want to make sure that the wire insulation will withstand the heat of the reflow temperature. A more reliable way would be to lay a trace