Electronics Forum | Tue May 02 05:35:07 EDT 2000 | Donnie
There are a number of different things to ask youreself here. What type of flux are you using. 330, 351, 310 etc. Do you have a hot air knife? As for the residue, that's gonna show on almost any wave soldered pcb. We have fought the issue for a long
Electronics Forum | Thu Apr 27 21:04:33 EDT 2000 | Dave F
Ron: Good news: Nicolet makes excellent machines. Bad news: I�m unaware of a machine with the capabilities you seek. * X-ray machines lack of resolution needed in relation to the crack geometries encountered within a high density single material.
Electronics Forum | Thu Apr 27 21:20:38 EDT 2000 | Dean
Here are some pointers to use during your X-ray inspection. Microcracking is virtually impossible to determine with X-ray. However, I suspect you are looking for "hard" opens. Those are much easier to find visually. If using a paste-and-place pro
Electronics Forum | Thu Apr 27 05:16:42 EDT 2000 | Wolfgang Busko
Despite the fact that one might get the "solution" set up in place there�s no guarantee that there�re no problems for you. I wouldn�t give to much of the decisions out of hand, I would have my own responsible people in the taskforce to accompany and
Electronics Forum | Tue May 02 14:19:26 EDT 2000 | Bill Schreiber
There are two primary causes of epoxy adhesive bond failure, heat and over exposure to moisture. Ultrasonic cavitation is a only a mechanical "scrubbing" action on a microscopic level. However, if the adhesive bond is week or has small areas of det
Electronics Forum | Fri Apr 21 23:12:35 EDT 2000 | Dean
Larry... I believe CCD offsets are not active on the IP3. Light levels and offsets are only availble in proper. Use Front Light. Use a P-pattern with bright lead, dark back background (I think #3)... The trick is to sample the lead width at the br
Electronics Forum | Fri Apr 21 13:26:15 EDT 2000 | Bob
I'm working on a project that requires that I analyze a signal from the parallel port of my computer and use it to turn on relays. There are about 19 relays to control, and I designed all the gates to get each one on, but there is a problem with keep
Electronics Forum | Wed Apr 19 22:45:31 EDT 2000 | Dave F
Rich: You should raise the issue until someone BIG smacks you!!! We were getting deliveries from our distributors and virtually every part number had an opened dry pack. We kept SCAR'n the dudes until they came in and sat down. It took a while ..
Electronics Forum | Thu Apr 20 21:45:10 EDT 2000 | Dave F
Wister: Oooo, I understand now what you mean by "an open." Sorry, I was (am) a bit dense. Your hypothesis is reasonable. On the other hand, have you looked at the traditional causes of tomb stoning also? For a defect to be a "tomb stone," it doe
Electronics Forum | Mon Apr 17 19:42:34 EDT 2000 | Russ Cutler
We just bought a new Heller 1800 EXL reflow oven for reflowing SMT boards. We us a low temp RMA solder paste with 2% silver. Everything we build is to IPC Class 3 specifications. We have approximately 600 different types of circuit boards we build
